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Search Results (2,204)

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Journal = Nutrients
Section = Nutrition and Metabolism

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12 pages, 563 KiB  
Article
Beyond Metabolism: Psychiatric and Social Dimensions in Bariatric Surgery Candidates with a BMI ≥ 50—A Prospective Cohort Study
by Marta Herstowska, Karolina Myśliwiec, Marta Bandura, Jędrzej Chrzanowski, Jacek Burzyński, Arkadiusz Michalak, Agnieszka Lejk, Izabela Karamon, Wojciech Fendler and Łukasz Kaska
Nutrients 2025, 17(15), 2573; https://doi.org/10.3390/nu17152573 - 7 Aug 2025
Abstract
Background: Super morbid obesity (SMO), defined as a body mass index (BMI) ≥ 50 kg/m2, represents a distinct and increasingly prevalent subgroup of patients undergoing bariatric surgery. Compared to individuals with lower BMI, patients with BMI ≥ 50 kg/m2 often [...] Read more.
Background: Super morbid obesity (SMO), defined as a body mass index (BMI) ≥ 50 kg/m2, represents a distinct and increasingly prevalent subgroup of patients undergoing bariatric surgery. Compared to individuals with lower BMI, patients with BMI ≥ 50 kg/m2 often exhibit unique clinical, psychological, and social characteristics that may influence treatment outcomes. Objective: This study aimed to compare demographic, metabolic, and psychiatric profiles of patients with BMI ≥ 50 kg/m2 and non-super morbid obesity (NSMO; BMI < 50 kg/m2) who were evaluated prior to bariatric surgery. Methods: A total of 319 patients were recruited between December 2022 and December 2023 at a bariatric center in Gdansk, Poland. All participants underwent a comprehensive preoperative assessment, including laboratory testing, psychometric screening (BDI, PHQ-9), and psychiatric interviews. Patients were stratified into class IV obesity and NSMO groups for comparative analysis. Results: Patients with BMI ≥ 50 kg/m2 were significantly older and more likely to report a history of lifelong obesity, family history of obesity, and childhood trauma. They had higher rates of obesity-related health problems such as hypertension, obstructive sleep apnea, and chronic venous insufficiency, as well as worse liver function and lipid profiles. Although the overall psychiatric burden was high in both groups, patients with BMI ≥ 50 kg/m2 reported fewer prior diagnoses of depression and eating disorders, despite similar scores on screening tools. Conclusions: Patients with BMI ≥ 50 kg/m2 represent a clinically distinct population with elevated metabolic risk, complex psychosocial backgrounds, and possibly underrecognized psychiatric burden. These findings underscore the need for multidisciplinary preoperative assessment and individualized treatment strategies in this group of patients. Full article
(This article belongs to the Section Nutrition and Metabolism)
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15 pages, 3724 KiB  
Article
Exploring the Association Between Multidimensional Dietary Patterns and Non-Scarring Hair Loss Using Mendelian Randomization
by Lingfeng Pan, Philipp Moog, Caihong Li, Leonard Steinbacher, Samuel Knoedler, Haydar Kükrek, Ulf Dornseifer, Hans-Günther Machens and Jun Jiang
Nutrients 2025, 17(15), 2569; https://doi.org/10.3390/nu17152569 - 7 Aug 2025
Viewed by 69
Abstract
Background: Androgenetic alopecia (AGA) and alopecia areata (AA) impose significant psychosocial burdens. While pharmacological and surgical treatments exist, the role of dietary factors remains underexplored due to methodological limitations in observational studies. This Mendelian randomization (MR) study investigates causal relationships between 187 dietary [...] Read more.
Background: Androgenetic alopecia (AGA) and alopecia areata (AA) impose significant psychosocial burdens. While pharmacological and surgical treatments exist, the role of dietary factors remains underexplored due to methodological limitations in observational studies. This Mendelian randomization (MR) study investigates causal relationships between 187 dietary exposures and hair loss, leveraging genetic variants to address confounding biases. Methods: Genome-wide association study (GWAS) data from 161,625 UK Biobank participants were analyzed, focusing on food preferences and intake patterns. Genetic instruments for each of the 187 dietary exposures were selected at a genome-wide significance threshold (p < 5 × 10−8), with rigorous sensitivity analyses (MR-Egger, MR-PRESSO) to validate causality. Outcomes included AA and AGA datasets from the FinnGen consortium. Results: MR analysis identified 18 specific dietary exposures significantly associated with non-scarring hair loss (FDR < 0.05). Protective effects emerged for antioxidant-rich dietary exposures, represented by higher preferences for melon, onions, and tea. Elevated risks were observed for certain exposures, including croissants, goat cheese, and whole milk. Alcohol consumption exhibited the strongest risk associations. Our extensive analysis of alcohol intake, combining data from multiple studies, consistently identified it as a significant risk factor for both alopecia areata and androgenetic alopecia. Conclusions: These findings imply modifiable dietary patterns in hair loss pathophysiology. A dual strategy is proposed: prioritizing polyphenol-rich plant foods while minimizing pro-inflammatory triggers like processed carbohydrates and alcohol. Clinically, tailored dietary adjustments—reducing ultra-processed foods and alcohol—may complement existing therapies for hair loss management. Full article
(This article belongs to the Section Nutrition and Metabolism)
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19 pages, 1376 KiB  
Article
The Effect of Short-Term Healthy Ketogenic Diet Ready-To-Eat Meals Versus Healthy Ketogenic Diet Counselling on Weight Loss in Overweight Adults: A Pilot Randomized Controlled Trial
by Melissa Hui Juan Tay, Qai Ven Yap, Su Lin Lim, Yuki Wei Yi Ong, Victoria Chantel Hui Ting Wee and Chin Meng Khoo
Nutrients 2025, 17(15), 2541; https://doi.org/10.3390/nu17152541 - 1 Aug 2025
Viewed by 472
Abstract
Background/Objectives: Conventional ketogenic diets, although effective for weight loss, often contain high total and saturated fat intake, which leads to increased low-density lipoprotein cholesterol (LDL-C). Thus, the Healthy Ketogenic Diet (HKD) was developed to address these concerns. It emphasizes calorie restriction, limiting net [...] Read more.
Background/Objectives: Conventional ketogenic diets, although effective for weight loss, often contain high total and saturated fat intake, which leads to increased low-density lipoprotein cholesterol (LDL-C). Thus, the Healthy Ketogenic Diet (HKD) was developed to address these concerns. It emphasizes calorie restriction, limiting net carbohydrate intake to 50 g per day, prioritizing unsaturated fats, and reducing saturated fat intake. However, adherence to the HKD remains a challenge in urban, time-constrained environments. Therefore, this pilot randomized controlled trial aimed to investigate the effects of Healthy Ketogenic Diet Ready-To-Eat (HKD-RTE) meals (provided for the first month only) versus HKD alone on weight loss and metabolic parameters among overweight adults. Methods: Multi-ethnic Asian adults (n = 50) with a body mass index (BMI) ≥ 27.5 kg/m2 were randomized into the HKD-RTE group (n = 24) and the HKD group (n = 26). Both groups followed the HKD for six months, with the HKD-RTE group receiving HKD-RTE meals during the first month. Five in-person workshops and mobile health coaching through the Nutritionist Buddy Keto app helped to facilitate dietary adherence. The primary outcome was the change in body weight at 6 months. Linear regression was performed on the change from baseline for each continuous outcome, adjusting for demographics and relevant covariates. Logistic regression was performed on binary weight loss ≥ 5%, adjusting for demographics and relevant covariates. Results: In the HKD group, participants’ adherence to the 50 g net carbohydrate target was 15 days, while that in the HKD-RTE group was 19 days over a period of 30 days. Participants’ adherence to calorie targets was 21 days in the HKD group and 23 days in the HKD-RTE. The average compliance with the HKD-RTE meals provided in the HKD-RTE group was 55%. The HKD-RTE group experienced a greater percentage weight loss at 1 month (−4.8 ± 3.0% vs. −1.8 ± 6.2%), although this was not statistically significant. This trend continued up to 6 months, with the HKD-RTE group showing a greater percentage weight reduction (−8.6 ± 6.8% vs. −3.9 ± 8.6%; p = 0.092). At 6 months, the HKD-RTE group had a greater reduction in total cholesterol (−0.54 ± 0.76 mmol/L vs. −0.05 ± 0.56 mmol/L; p = 0.283) and LDL-C (−0.43 ± 0.67 mmol/L vs. −0.03 ± 0.52 mmol/L; p = 0.374) compared to the HKD group. Additionally, the HKD-RTE group exhibited greater reductions in systolic blood pressure (−8.3 ± 9.7 mmHg vs. −5.3 ± 11.0 mmHg), diastolic blood pressure (−7.7 ± 8.8 mmHg vs. −2.0 ± 7.0 mmHg), and HbA1c (−0.3 ± 0.5% vs. −0.1 ± 0.4%) than the HKD group (not statistically significant for any). Conclusions: Both HKD-RTE and HKD led to weight loss and improved metabolic profiles. The HKD-RTE group tended to show more favorable outcomes. Short-term HKD-RTE meal provision may enhance initial weight loss, with sustained long-term effects. Full article
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22 pages, 11011 KiB  
Article
Flavonoid Extract of Senecio scandens Buch.-Ham. Ameliorates CTX-Induced Immunosuppression and Intestinal Damage via Activating the MyD88-Mediated Nuclear Factor-κB Signaling Pathway
by Xiaolin Zhu, Lulu Zhang, Xuan Ni, Jian Guo, Yizhuo Fang, Jianghan Xu, Zhuo Chen and Zhihui Hao
Nutrients 2025, 17(15), 2540; https://doi.org/10.3390/nu17152540 - 1 Aug 2025
Viewed by 195
Abstract
Background/Objectives: Senecio scandens Buch.-Ham. is a flavonoid-rich traditional medicinal plant with established immunomodulatory properties. However, the mechanisms underlying the immunoregulatory and intestinal protective effects of its flavonoid extract (Senecio scandens flavonoids—SSF) remain unclear. This study characterized SSF’s bioactive components and evaluated [...] Read more.
Background/Objectives: Senecio scandens Buch.-Ham. is a flavonoid-rich traditional medicinal plant with established immunomodulatory properties. However, the mechanisms underlying the immunoregulatory and intestinal protective effects of its flavonoid extract (Senecio scandens flavonoids—SSF) remain unclear. This study characterized SSF’s bioactive components and evaluated its efficacy against cyclophosphamide (CTX)-induced immunosuppression and intestinal injury. Methods: The constituents of SSF were identified using UHPLC/Q-Orbitrap/HRMS. Mice with CTX-induced immunosuppression were treated with SSF (80, 160, 320 mg/kg) for seven days. Immune parameters (organ indices, lymphocyte proliferation, cytokine, and immunoglobulin levels) and gut barrier integrity markers (ZO-1, Occludin, Claudin-1 protein expression; sIgA secretion; microbiota composition) were assessed. Network pharmacology combined with functional assays elucidated the underlying regulatory mechanisms. Results: Twenty flavonoids were identified in SSF, with six prototype compounds detectable in the blood. The SSF treatment significantly ameliorated CTX-induced weight loss and atrophy of the thymus and spleen. It enhanced splenic T- and B-lymphocyte proliferation by 43.6% and 29.7%, respectively; normalized the CD4+/CD8+ ratio (1.57-fold increase); and elevated levels of IL-2, IL-6, IL-10, TNF-α, IFN-γ, IgM, and IgG. Moreover, SSF reinforced the intestinal barrier by upregulating tight junction protein expression and sIgA levels while modulating the gut microbiota, enriching beneficial taxa (e.g., the Lachnospiraceae_NK4A136_group, Akkermansia) and suppressing pathogenic Alistipes. Mechanistically, SSF activated the TLR/MyD88/NF-κB pathway, with isoquercitrin identified as a pivotal bioactive constituent. Conclusions: SSF effectively mitigates CTX-induced immunosuppression and intestinal damage. These findings highlight SSF’s potential as a dual-functional natural agent for immunomodulation and intestinal protection. Subsequent research should validate isoquercitrin’s molecular targets and assess SSF’s clinical efficacy. Full article
(This article belongs to the Section Nutrition and Metabolism)
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14 pages, 3410 KiB  
Article
Gut Hormones and Postprandial Metabolic Effects of Isomaltulose vs. Saccharose Consumption in People with Metabolic Syndrome
by Jiudan Zhang, Dominik Sonnenburg, Stefan Kabisch, Stephan Theis, Margrit Kemper, Olga Pivovarova-Ramich, Domenico Tricò, Sascha Rohn and Andreas F. H. Pfeiffer
Nutrients 2025, 17(15), 2539; https://doi.org/10.3390/nu17152539 - 1 Aug 2025
Viewed by 218
Abstract
Background: Low-glycemic index (GI) carbohydrates like isomaltulose (ISO) are known to enhance incretin release and to improve postprandial glucose control at the following meal (an effect known as second meal effect, or SME), which is particularly beneficial for individuals with metabolic syndrome (MetS). [...] Read more.
Background: Low-glycemic index (GI) carbohydrates like isomaltulose (ISO) are known to enhance incretin release and to improve postprandial glucose control at the following meal (an effect known as second meal effect, or SME), which is particularly beneficial for individuals with metabolic syndrome (MetS). This study aimed to assess the most effective preprandial interval of ISO- or saccharose (SUC) snacks (1 h vs. 3 h preload) to enhance prandial incretin responses to a subsequent meal. Methods: In a randomized crossover design, 15 participants with MetS completed four experimental conditions on four non-consecutive days, combining two preload types (ISO or SUC) and two preload timings (Intervention A: 3 h preload; Intervention B: 1 h preload). Specifically, the four conditions were (1) ISO + Intervention A, (2) SUC + Intervention A, (3) ISO + Intervention B, and (4) SUC + Intervention B. The order of conditions was randomized and separated by a 3–7-day washout period to minimize carryover effects. On each study day, participants consumed two mixed meal tests (MMT-1 and MMT-2) with a standardized preload (50 g ISO or SUC) administered either 3 h or 1 h prior to MMT-2. Blood samples were collected over 9 h at 15 predefined time points for analysis of glucose, insulin, C-peptide, and incretin hormones (GLP-1, GIP, and PYY). Results: The unique digestion profile of ISO resulted in a blunted glucose ascent rate (ΔG/Δt: 0.28 vs. 0.53 mmol/L/min for SUC, p < 0.01), paralleled by synonyms PYY elevation over 540 min monitoring, compared with SUC. ISO also led to higher and more sustained GLP-1 and PYY levels, while SUC induced a stronger GIP response. Notably, the timing of ISO consumption significantly influenced PYY secretion, with the 3 h preload showing enhanced PYY responses and a more favorable SME compared to the 1 h preload. Conclusions: ISO, particularly when consumed 3 h before a meal (vs. 1 h), offers significant advantages over SUC by elevating PYY levels, blunting the glucose ascent rate, and sustaining GLP-1 release. This synergy enhances the second meal effect, suggesting ISO’s potential for managing postprandial glycemic excursions in MetS. Full article
(This article belongs to the Section Nutrition and Metabolism)
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24 pages, 2735 KiB  
Article
Dietary Intake of a Milk Sphingolipid-Rich MFGM/EV Concentrate Ameliorates Age-Related Metabolic Dysfunction
by Richard R. Sprenger, Kat F. Kiilerich, Mikael Palner, Arsênio Rodrigues Oliveira, Mikaël Croyal, Marie S. Ostenfeld, Ann Bjørnshave, Gitte M. Knudsen and Christer S. Ejsing
Nutrients 2025, 17(15), 2529; https://doi.org/10.3390/nu17152529 - 31 Jul 2025
Viewed by 323
Abstract
Background/Objectives: Nutraceuticals containing milk fat globule membranes (MFGMs) and extracellular vesicles (EVs) are purported to abate age-related metabolic dysfunction due to their richness in milk sphingolipids. As such, nutraceuticals offer a compelling strategy to improve metabolic health through dietary means, especially for elderly [...] Read more.
Background/Objectives: Nutraceuticals containing milk fat globule membranes (MFGMs) and extracellular vesicles (EVs) are purported to abate age-related metabolic dysfunction due to their richness in milk sphingolipids. As such, nutraceuticals offer a compelling strategy to improve metabolic health through dietary means, especially for elderly persons who are unable to adhere to common therapeutic interventions. To address this, we examined the effects of supplementing aged sedentary rats with an MFGM/EV-rich concentrate. Methods/Results: In a 25-week study, 89-week-old male rats received either a milk sphingolipid-rich MFGM/EV concentrate or a control supplement. Analysis of metabolic health using a battery of tests, including MSALL lipidomics of plasma, liver, and other peripheral tissues, revealed that MFGM/EV supplementation promotes accretion of unique sphingolipid signatures, ameliorates ceramide biomarkers predictive of cardiovascular death, and has a general lipid-lowering effect. At the functional level, we find that these health-promoting effects are linked to increased lipoprotein particle turnover, showcased by reduced levels of triglyceride-rich particles, as well as a metabolically healthier liver, assessed using whole-body lipidomic flux analysis. Conclusions: Altogether, our work unveils that MFGM/EV-containing food holds a potential for ameliorating age-related metabolic dysfunction in elderly individuals. Full article
(This article belongs to the Special Issue Diet and Nutrition: Metabolic Diseases---2nd Edition)
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12 pages, 1734 KiB  
Article
Lipid-Modulating Effects of Sargassum fulvellum Fermented by Lactococcus lactis KCCM12759P and Leuconostoc mesenteroides KCCM12756P in Ovariectomized Mice
by Hyun-Sol Jo, Young-Eun Cho and Sun-Mee Hong
Nutrients 2025, 17(15), 2527; https://doi.org/10.3390/nu17152527 - 31 Jul 2025
Viewed by 176
Abstract
Background/Objectives: Estrogen deficiency contributes to dyslipidemia and visceral adiposity, increasing cardiovascular risk in postmenopausal women. Sargassum fulvellum (Sf), a brown seaweed rich in bioactive compounds, possesses lipid-regulating properties that may be enhanced by lactic acid bacteria fermentation. This study aimed to evaluate [...] Read more.
Background/Objectives: Estrogen deficiency contributes to dyslipidemia and visceral adiposity, increasing cardiovascular risk in postmenopausal women. Sargassum fulvellum (Sf), a brown seaweed rich in bioactive compounds, possesses lipid-regulating properties that may be enhanced by lactic acid bacteria fermentation. This study aimed to evaluate the effects of fermented S. fulvellum (SfLlLm), prepared using Lactococcus lactis and Leuconostoc mesenteroides, on lipid metabolism and adipose tissue remodeling in an ovariectomized (OVX) mouse model of estrogen deficiency. Methods: Female C57BL/6 mice underwent ovariectomy and were fed an AIN-76A diet supplemented with either unfermented Sf or SfLlLm for eight weeks. Sham-operated and 17β-estradiol-treated OVX groups served as controls. Serum lipid levels—total cholesterol, triglycerides, LDL-C, and HDL-C—were assessed, and histological analysis of visceral adipose tissue was conducted to evaluate adipocyte morphology. Results: OVX-induced estrogen deficiency led to increased total cholesterol, triglycerides, and LDL-C, along with hypertrophic changes in visceral adipocytes. Supplementation with fermented Sargassum fulvellum (SfLlLm) markedly improved these parameters, reducing total cholesterol by 6.7%, triglycerides by 9.3%, and LDL-C by 52.9%, while increasing HDL-C by 17.5% compared to the OVX controls. SfLlLm also normalized visceral adipocyte size and distribution. These effects were comparable to or exceeded those of 17β-estradiol treatment. Conclusions: Fermented SfLlLm ameliorated dyslipidemia and visceral adiposity under estrogen-deficient conditions. These findings support its potential as a functional dietary intervention for managing postmenopausal lipid disorders and associated metabolic complications. Full article
(This article belongs to the Special Issue Diet and Nutrition: Metabolic Diseases---2nd Edition)
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4 pages, 149 KiB  
Editorial
Managing Obesity: The Need for Individualized Therapy
by Karolina Szewczyk-Golec and Iga Hołyńska-Iwan
Nutrients 2025, 17(15), 2498; https://doi.org/10.3390/nu17152498 - 30 Jul 2025
Viewed by 179
Abstract
Obesity, overweight, malnutrition, and metabolic diseases have been the subject of scientific research and have attracted the attention of health organizations for years [...] Full article
16 pages, 1702 KiB  
Article
Does Salt Form Matter? A Pilot Randomized, Double-Blind, Crossover Pharmacokinetic Comparison of Crystalline and Regular Glucosamine Sulfate in Healthy Volunteers
by Chuck Chang, Afoke Ibi, Yiming Zhang, Min Du, Yoon Seok Roh, Robert O’Brien and Julia Solnier
Nutrients 2025, 17(15), 2491; https://doi.org/10.3390/nu17152491 - 30 Jul 2025
Viewed by 323
Abstract
Background: Crystalline glucosamine sulfate (cGS) claims to be a stabilized form of glucosamine sulfate with a defined crystalline structure intended to enhance chemical stability. It is proposed to offer pharmacokinetic advantages over regular glucosamine sulfate (rGS) which is stabilized with potassium or [...] Read more.
Background: Crystalline glucosamine sulfate (cGS) claims to be a stabilized form of glucosamine sulfate with a defined crystalline structure intended to enhance chemical stability. It is proposed to offer pharmacokinetic advantages over regular glucosamine sulfate (rGS) which is stabilized with potassium or sodium chloride. However, comparative human bioavailability data are limited. Since both forms dissociate in gastric fluid into constituent ions, the impact of cGS formulation on absorption remains uncertain. This pilot study aimed to compare the bioavailability of cGS and rGS using a randomized, double-blind, crossover design. Methods: Ten healthy adults received a single 1500 mg oral dose of either cGS or rGS with a 7-day washout between interventions. Capillary blood samples were collected over 24 h. Glucosamine and its metabolite concentrations were quantified by Liquid Chromatography-High Resolution Mass Spectrometry (LC-HRMS), and pharmacokinetic parameters—including maximum concentration (Cmax), time to reach Cmax (Tmax), and area under the curve (AUC)—were calculated. Results: Mean AUC0–24, Cmax, Tmax, and T½ values for glucosamine and glucosamine-6-sulfate (GlcN-6-S) were comparable between cGS and rGS. Although the AUC0–24 for glucosamine was modestly higher with rGS (18,300 ng·h/mL) than with cGS (12,900 ng·h/mL), the difference was not statistically significant (p = 0.136). GlcN-6-S exposure was also similar between formulations (rGS: 50,700 ng·h/mL; cGS: 50,600 ng·h/mL), with a geometric mean ratio of 1.39, a delayed Tmax (6–8 h) and longer half-life, consistent with its role as a downstream metabolite. N-acetylglucosamine levels remained stable, indicating potential homeostatic regulation. Conclusions: This pilot study found no significant pharmacokinetic advantage of cGS over rGS. These preliminary findings challenge claims of cGS’ pharmacokinetic superiority, although the small sample size limits definitive conclusions. Larger, adequately powered studies are needed to confirm these results. Full article
(This article belongs to the Special Issue Bone-Health-Promoting Bioactive Nutrition)
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13 pages, 982 KiB  
Article
Salivary pH Modulation and Antimicrobial Properties of Oregano-Oil Jelly in Relation to Menstrual and Menopausal Status
by Georgiana Ioana Potra Cicalău, Gabriela Ciavoi, Ioana Scrobota, Ionut Daniel Venter, Madalin Florin Ganea, Marc Cristian Ghitea, Evelin Claudia Ghitea, Maria Flavia Gîtea, Timea Claudia Ghitea, Csaba Nagy, Diana Constanta Pelea, Luciana Dobjanschi, Octavia Gligor, Corina Moisa and Mariana Ganea
Nutrients 2025, 17(15), 2480; https://doi.org/10.3390/nu17152480 - 29 Jul 2025
Viewed by 244
Abstract
Background: Salivary pH plays a critical role in oral health by influencing enamel demineralization, buffering capacity, and the ecology of oral microbiota. Essential oils such as Origanum vulgare (oregano) possess well-documented antimicrobial properties that may reduce acidogenic bacterial activity. However, the effects of [...] Read more.
Background: Salivary pH plays a critical role in oral health by influencing enamel demineralization, buffering capacity, and the ecology of oral microbiota. Essential oils such as Origanum vulgare (oregano) possess well-documented antimicrobial properties that may reduce acidogenic bacterial activity. However, the effects of edible delivery systems like jellies on salivary pH modulation and their potential interactions with hormonal states remain poorly understood. Methods: This study evaluated the in vitro antimicrobial activity of an oregano-oil-based jelly formulation against standard bacterial (Staphylococcus aureus, Streptococcus pyogenes, and Escherichia coli) and fungal (Candida albicans) strains using the Kirby–Bauer disc diffusion method. Additionally, a human trial (n = 91) measured salivary pH before and after administration of the oregano-oil jelly. Participants were characterized by age, smoking status, menopausal status, and presence of menstruation. Multiple linear regression was used to identify predictors of final salivary pH. Results: The oregano-oil jelly demonstrated strong in vitro antimicrobial activity, with inhibition zones up to 8 mm for E. coli and C. albicans. In vivo, mean unstimulated salivary pH increased from 6.94 to 7.07 overall, indicating a mild alkalinizing effect. However, menstruating participants showed a significant decrease in final pH (from 7.03 to 6.78). Multiple regression identified menstruation as a significant negative predictor (β = −0.377, p < 0.001) and initial pH as a positive predictor (β = +0.275, p = 0.002). Menopausal status was not a significant predictor, likely due to the small sample size. Conclusions: Oregano-oil jellies may represent a promising natural approach to support oral health by increasing salivary pH and providing strong antimicrobial activity. However, physiological states such as menstruation can significantly modulate this response, underscoring the importance of personalized or phase-aware oral care strategies. Further studies with larger, diverse cohorts and controlled hormonal assessments are needed to validate these findings and optimize product formulations. Full article
(This article belongs to the Section Nutrition and Metabolism)
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17 pages, 1402 KiB  
Article
A 3-Week Inpatient Rehabilitation Programme Improves Body Composition in People with Cystic Fibrosis with and Without Elexacaftor/Tezacaftor/Ivacaftor Therapy
by Jana Koop, Wolfgang Gruber, Franziska A. Hägele, Kristina Norman, Catrin Herpich, Stefan Dewey, Christian Falkenberg, Olaf Schnabel, Burkhard Weisser, Mario Hasler and Anja Bosy-Westphal
Nutrients 2025, 17(15), 2439; https://doi.org/10.3390/nu17152439 - 25 Jul 2025
Viewed by 250
Abstract
Background: The introduction of cystic fibrosis transmembrane conductance regulator modulators, especially the triple therapy elexacaftor, tezacaftor, ivacaftor (ETI), has improved outcomes in people with cystic fibrosis (pwCF), reducing underweight but increasing overweight rates. Objectives: This study investigates the effect of ETI on appetite [...] Read more.
Background: The introduction of cystic fibrosis transmembrane conductance regulator modulators, especially the triple therapy elexacaftor, tezacaftor, ivacaftor (ETI), has improved outcomes in people with cystic fibrosis (pwCF), reducing underweight but increasing overweight rates. Objectives: This study investigates the effect of ETI on appetite control, body composition, and energy balance during a 3-week inpatient rehabilitation programme with regular exercise. Methods: In 54 pwCF (38 on ETI, 16 without ETI), changes in body composition (fat mass index, FMI; fat-free mass index, FFMI) and energy balance (calculated from body composition changes) were assessed. Appetite control was evaluated via plasma peptide YY (PYY) levels and post-exercise meal energy intake. Results: The programme significantly increased BMI (+0.3 ± 0.1 kg/m2; CI 0.1–0.4) and energy balance (+4317 ± 1976 kcal/3 weeks), primarily through FFMI gains (+0.3 ± 0.1 kg/m2; CI 0.1–0.4). Despite higher post-exercise meal energy intake and a tendency towards lower PYY levels in the ETI group, changes in body composition and energy balance did not differ between groups. This is explained by a higher prevalence of exocrine pancreatic insufficiency in the ETI group (92% vs. 50%, p < 0.001). Small sample sizes limit the interpretation of data on appetite control and energy intake. Conclusions: A 3-week inpatient rehabilitation programme improved body composition in pwCF, without resulting in a more positive energy balance with ETI therapy. This is due to a higher prevalence of pancreatic insufficiency in this group. Full article
(This article belongs to the Section Nutrition and Metabolism)
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18 pages, 2650 KiB  
Article
Prevention of Metabolic Impairment by Dietary Nitrate in Overweight Male Mice Improves Stroke Outcome
by Ellen Vercalsteren, Dimitra Karampatsi, Carolina Buizza, Gesine Paul, Jon O. Lundberg, Thomas Nyström, Vladimer Darsalia and Cesare Patrone
Nutrients 2025, 17(15), 2434; https://doi.org/10.3390/nu17152434 - 25 Jul 2025
Viewed by 345
Abstract
Background/objectives: Being overweight increases the predisposition to obesity and type 2 diabetes (T2D), which significantly elevate stroke risk and the likelihood of severe post-stroke disability. Dietary nitrate (NO3) supplementation can mitigate obesity and metabolic impairments, making it a promising [...] Read more.
Background/objectives: Being overweight increases the predisposition to obesity and type 2 diabetes (T2D), which significantly elevate stroke risk and the likelihood of severe post-stroke disability. Dietary nitrate (NO3) supplementation can mitigate obesity and metabolic impairments, making it a promising approach to halt overweight people from developing overt obesity/T2D, thereby potentially also improving stroke outcome. We determined whether NO3 supplementation prevents overweight mice from progressing into obesity and T2D and whether this intervention improves stroke outcome. Methods: An overweight condition was induced via 6 weeks of a high-fat diet (HFD), after which animals were randomized to either a HFD or a HFD with NO3 supplementation. After 24 weeks, when HFD-mice without NO3 developed obesity and T2D, all animals were subjected to transient middle cerebral artery occlusion and stroke outcome was assessed via behavioral testing and infarct size. The effect of NO3 on post-stroke neuroinflammation, neurogenesis, and neovascularization was analyzed by immunohistochemistry. Results: Sustained NO3 supplementation in overweight mice did not prevent obesity or insulin resistance. However, it attenuated weight gain, prevented hyperglycemia, and significantly improved functional recovery after stroke, without affecting infarct size. Moreover, NO3 decreased post-stroke neuroinflammation by reducing microglial infiltration. NO3 did not affect stroke-induced neurogenesis or vascularization. Conclusion: These results highlight the potential of NO3 supplementation to prevent metabolic impairment in the overweight population and improve stroke prognosis in this large group of people at risk of stroke and severe stroke sequelae. Full article
(This article belongs to the Section Nutrition and Metabolism)
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14 pages, 1004 KiB  
Article
Beyond Weight Loss: Comparative Effects of Tirzepatide Plus Low-Energy Ketogenic Versus Low-Calorie Diet on Hepatic Steatosis and Stiffness in MASLD
by Luigi Schiavo, Biagio Santella, Monica Mingo, Gianluca Rossetti, Marcello Orio and Vincenzo Pilone
Nutrients 2025, 17(15), 2409; https://doi.org/10.3390/nu17152409 - 24 Jul 2025
Viewed by 485
Abstract
Background: Metabolic dysfunction-associated steatotic liver disease (MASLD) is the most common chronic liver condition globally, strongly linked to obesity, insulin resistance, and type 2 diabetes (T2D). Tirzepatide (TZP), a dual GIP/GLP-1 receptor agonist, improves glycemic control and reduces body weight and the [...] Read more.
Background: Metabolic dysfunction-associated steatotic liver disease (MASLD) is the most common chronic liver condition globally, strongly linked to obesity, insulin resistance, and type 2 diabetes (T2D). Tirzepatide (TZP), a dual GIP/GLP-1 receptor agonist, improves glycemic control and reduces body weight and the liver fat content in patients with obesity and T2D. However, its effect on liver-specific outcomes such as steatosis and fibrosis remains incompletely characterized. Low-energy ketogenic therapy (LEKT), a nutritional strategy characterized by carbohydrate restriction and nutritional ketosis, may enhance hepatic β-oxidation and reduce hepatic lipogenesis. To date, however, the combination of TZP and LEKT has not been studied in patients with metabolic dysfunction-associated steatotic liver disease (MASLD). This study aimed to compare the hepatic and metabolic effects of TZP combined with either LEKT or a conventional low-calorie diet (LCD) over a 12-week period. Methods: Sixty adult patients with MASLD undergoing TZP therapy were prospectively assigned to either an LEKT or a conventional LCD, with 30 participants per group. As primary endpoints, the controlled attenuation parameter (CAP, an index of hepatic steatosis) and liver stiffness measurement (LSM, an index of liver fibrosis) were assessed at the baseline and after 12 weeks using FibroScan®. Secondary outcomes included changes in body mass index (BMI), glycated hemoglobin (HbA1c), and liver enzymes. Adherence to both diet and pharmacological treatment, as well as tolerability, were systematically monitored throughout the intervention period. Results: Both groups showed significant reductions in body weight (TZP + LEKT, p = 0.0289; TZP + LCD, p = 0.0278), with no significant intergroup difference (p = 0.665). CAP and LSM improved significantly in both groups, but reductions were greater in the TZP + LEKT group (CAP −12.5%, p < 0.001; LSM −22.7%, p < 0.001) versus LCD (CAP −6.7%, p = 0.014; LSM −9.2%, p = 0.022). Between-group differences were statistically significant for both CAP (p = 0.01) and LSM (p = 0.03). Conclusions: Based on these preliminary findings, we support the hypothesis that the combination of TZP and LEKT may be superior to TZP with an LCD in reducing hepatic steatosis and stiffness in individuals with obesity. Full article
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19 pages, 3827 KiB  
Article
A Refined Carbohydrate-Rich Diet Reduces Vascular Reactivity Through Endothelial Oxidative Stress and Increased Nitric Oxide: The Involvement of Inducible Nitric Oxide Synthase
by Karoline Neumann, Nina Bruna de Souza Mawandji, Ingridy Reinholz Grafites Schereider, Emanuelle Coutinho de Oliveira, Julia Martins Vieira, Andressa Bolsoni-Lopes, Jones Bernardes Graceli, Julia Antonietta Dantas, Lorena Silveira Cardoso, Dalton Valentim Vassallo and Karolini Zuqui Nunes
Nutrients 2025, 17(15), 2395; https://doi.org/10.3390/nu17152395 - 22 Jul 2025
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Abstract
Background/Objectives: The consumption of refined carbohydrates has increased globally. It is associated with inflammation and oxidative stress, both recognized as risk factors for cardiovascular disease. This study investigated the effects of a refined carbohydrate-rich diet on the vascular reactivity of rat aorta. Methods: [...] Read more.
Background/Objectives: The consumption of refined carbohydrates has increased globally. It is associated with inflammation and oxidative stress, both recognized as risk factors for cardiovascular disease. This study investigated the effects of a refined carbohydrate-rich diet on the vascular reactivity of rat aorta. Methods: We acclimatized adult male Wistar rats for two weeks and then randomly assigned them to two experimental groups: a control (CT) group and a high-carbohydrate diet (HCD) group. The CT group received standard laboratory chow for 15 days, while the HCD group received a diet composed of 45% sweetened condensed milk, 10% refined sugar, and 45% standard chow. After the dietary exposure period, we evaluated the vascular reactivity of aortic rings, gene expression related to inflammation, superoxide dismutase activity, and biochemical parameters, including cholesterol, triglycerides, fasting glucose, and glucose and insulin tolerance. Results: The results demonstrate a reduction in vascular reactivity caused by endothelial alterations, including increased NO production, which was observed as higher vasoconstriction in the presence of L-NAME and aminoguanidine and upregulation of iNOS gene expression. In addition, increased production of free radicals, such as O2-, was observed, as well as immune markers like MCP-1 and CD86 in the HCD group. Additionally, the HCD group showed an increase in the TyG index, suggesting early metabolic impairment. GTT and ITT results revealed higher glycemic levels, indicating early signs of insulin resistance. Conclusions: These findings indicate that short-term consumption of a refined carbohydrate-rich diet may trigger oxidative stress and endothelial dysfunction, thereby increasing the risk of cardiovascular complications. Full article
(This article belongs to the Section Nutrition and Metabolism)
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12 pages, 1261 KiB  
Article
Sex Differences in the Association Between the Korean Healthy Eating Index and Liver Enzymes Among Korean Adults
by Seong-Uk Baek and Jin-Ha Yoon
Nutrients 2025, 17(14), 2372; https://doi.org/10.3390/nu17142372 - 20 Jul 2025
Viewed by 27938
Abstract
Background/Objectives: Dietary quality plays a crucial role in maintaining liver function. In this study, we examined sex differences in the association between dietary quality and elevated liver enzyme levels in Korean adults. Methods: This study included a nationwide sample of 15,997 males and [...] Read more.
Background/Objectives: Dietary quality plays a crucial role in maintaining liver function. In this study, we examined sex differences in the association between dietary quality and elevated liver enzyme levels in Korean adults. Methods: This study included a nationwide sample of 15,997 males and 22,300 females in South Korea. Dietary assessment was performed using the Korean Healthy Eating Index (KHEI), an evidence-based dietary quality index that quantitatively reflects adherence to Korean dietary guidelines (range 0–100). Serum levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were measured, with individuals classified as having elevated AST or ALT levels when values were ≥40 IU/L or ≥35 IU/L, respectively. Logistic regression analysis was performed to examine the association between the KHEI and elevated AST or ALT levels stratified by sex. Odds ratios (ORs) and 95% confidence intervals (CIs) were determined. Results: Among the males, a 10-point increase in the KHEI score was inversely associated with the likelihood of having elevated AST (OR: 0.90; 95% CI: 0.85–0.96) and ALT (OR: 0.96; 95% CI: 0.92–1.00) levels, respectively. Among the females, there was no clear association between the KHEI and elevated AST (OR: 0.98; 95% CI: 0.91–1.05) or ALT (OR: 1.00; 95% CI: 0.95–1.05) levels. Conclusion: Further research is warranted to elucidate the underlying mechanisms of the observed sex-specific associations and guide the development of targeted dietary interventions for liver health in males and females. Full article
(This article belongs to the Special Issue Nutritional Support for Improving the Life Quality in Liver Disease)
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