Exploring the Role of Protein in Dairy Products: Nutrition, Functionality and Innovation

A special issue of Foods (ISSN 2304-8158). This special issue belongs to the section "Dairy".

Deadline for manuscript submissions: 20 August 2026 | Viewed by 562

Special Issue Editors


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Guest Editor
College of Food Science, South China Agricultural University, Guangzhou 510642, China
Interests: food matrices; powder technology; dairy protein; casein micelle; protein functionality; nutrient delivery
Special Issues, Collections and Topics in MDPI journals
School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
Interests: dairy ingredients; protein–polysaccharide interactions; biopolymer functionality; food colloids and emulsions; nutrient delivery; food soft matter

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Guest Editor
Université Paris-Saclay, INRAE, AgroParisTech, UMR SayFood, 91120 Palaiseau, France
Interests: process engineering; powder technology; food processing and engineering; particle characterization; powder characterization; spray drying; encapsulation; microencapsulation; agglomeration

Special Issue Information

Dear Colleagues,

Dairy products remain a cornerstone of human nutrition, prized for their rich array of essential nutrients, with protein being a central component. Proteins such as casein and whey are not only fundamental to the nutritional prestige of dairy but are also the primary architects of its sensory and functional properties—from the gelation in yogurt and the stretch in cheese to the stability of a protein shake.

The contemporary dairy sector faces a dual challenge of meeting the growing demand for nutritious and delicious products while advancing towards greater environmental and economic sustainability. The key to addressing this challenge lies in a sophisticated understanding of dairy proteins. This Special Issue is dedicated to showcasing research that illuminates the multifaceted role of proteins, driving innovation from raw material processing to the development of next-generation dairy foods. Thus, the Special Issue aims to provide a platform for high-quality research and review articles that analyze the critical aspects of dairy proteins. The scope encompasses the entire journey from “farm to fork,” with a specific focus on the interplay between protein composition, technological functionality, nutritional outcomes, and product engineering. A particular focus will be placed on elucidating how processing conditions, protein structure, and protein–matrix interactions govern techno-functional properties, including gelation, emulsification, and interfacial performance. Studies on alternative or hybrid dairy proteins are also of significant interest.

Dr. Shaozong Wu
Dr. Jinhua Hu
Prof. Dr. Christelle Turchiuli
Guest Editors

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Keywords

  • dairy proteins
  • protein functionality
  • bioactive peptides
  • digestibility and bioavailability
  • sustainable processing
  • product innovation
  • food product engineering
  • food process engineering
  • multi-scale characterization
  • protein alternatives

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Published Papers (1 paper)

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Research

19 pages, 6615 KB  
Article
The Functional Properties and In Vitro Digestibility of Casein-Rich Powder Prepared by Calcium Chelation and Spray Drying
by Dan Hu, Jieyu Tan, Yichun Li, Qiantong Zhong, Zonglin Guo, Jie Lin, Hua Zheng, Hongtao Lei and Shaozong Wu
Foods 2026, 15(10), 1771; https://doi.org/10.3390/foods15101771 - 17 May 2026
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Abstract
To improve the functional performance and digestibility of casein-rich ingredients, this study investigated the effects of trisodium citrate (TC) chelation and spray drying on the functional properties and in vitro digestibility of micellar casein isolate (MCI). TC chelation improved the foaming, emulsifying, gelling, [...] Read more.
To improve the functional performance and digestibility of casein-rich ingredients, this study investigated the effects of trisodium citrate (TC) chelation and spray drying on the functional properties and in vitro digestibility of micellar casein isolate (MCI). TC chelation improved the foaming, emulsifying, gelling, and digestive properties of casein to different extents. Compared with MCI, trisodium citrate-chelated casein (TCC) exhibited significantly enhanced foaming capacity; specifically, the foaming capacities of TCC-40 and TCC-60 increased to 58.0% and 60.0%, respectively. TC reduced particle size, leading to increased foam volume, whereas foam stability decreased at higher chelation levels. In terms of emulsifying properties, TCC-10 exhibited optimal performance, with most emulsion droplet diameters distributed within 1–5 μm. TC chelation induced a significant negative shift in zeta potential (p < 0.05), suggesting improved emulsion stability. Gelation behavior was linked with concentration, showing TCC-40 induced the shortest gelation time (3.98 min) and the highest storage modulus. TC significantly enhanced casein digestibility in both adult and elderly in vitro digestion models, with digestion efficiency in the elderly model approaching that of the adult model. Confocal laser scanning microscopy (CLSM) pictures indicated that calcium chelation reduced gastric floc compactness, facilitating enzymatic access and improving protein hydrolysis efficiency. The study reveals the advantage of calcium chelation on the functional properties and digestibility of casein-based powder. Full article
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