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Is Vitamin D Supplementation Useful for Weight Loss Programs? A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Department of Biology, College of Science, University of Bahrain, Sakhir Campus P.O. Box 32038, Bahrain
Medicina 2019, 55(7), 368; https://doi.org/10.3390/medicina55070368
Received: 5 May 2019 / Revised: 10 July 2019 / Accepted: 10 July 2019 / Published: 12 July 2019
(This article belongs to the Special Issue The Role of Vitamin D in Obesity)
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Abstract

Background and Objectives: The controversy about the impact of vitamin D supplementation on weight loss treatment was observed in several randomized controlled trials (RCTs). This meta-analysis investigates the effects of vitamin D supplementation (cholecalciferol or ergocalciferol) on weight loss through holistic measurements of Body Mass Index (BMI), weight and waist circumference. Materials and Methods: Google Scholar, WOS, PubMed and Scopus were explored to collect relevant studies. The selected articles focused on vitamin D supplementation in overweight and obese individuals with different conditions. Eleven RCTs were included into this meta-analysis with a total of 947 subjects, with a mean of the follow-up from 1 to 12 months and different vitamin D interventions (from 25,000 to 600,000 IU/monthly of cholecalciferol). Results: The meta-analyzed mean differences for random effects showed that cholecalciferol supplementation deceases the BMI by −0.32 kg/m2 (CI95% −0.52, −0.12 kg/m2, p = 0.002) and the waist circumference by −1.42 cm (CI95% −2.41, −0.42 cm, p = 0.005), but does not statistically affect weight loss −0.43 kg (CI95% −1.05, +0.19 kg, p = 0.17). Conclusions: This meta-analysis lays the foundation for defining the potential clinical efficacy of vitamin D supplementation as a potential therapeutic option for weight loss programs, but further studies are needed to confirm the validity of these findings and delineate potential underlying mechanisms. View Full-Text
Keywords: obesity; diet; metabolic syndrome; bariatric surgery; diabetes obesity; diet; metabolic syndrome; bariatric surgery; diabetes
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Perna, S. Is Vitamin D Supplementation Useful for Weight Loss Programs? A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Medicina 2019, 55, 368.

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