Phan Thanh Tam, Nguyen Hai Van and Nguyen Ngoc Hieu 2025. Research on the production of high-purity calcium lactate from poultry eggshells and their application in food . Vietnam Journal of Science, Technology and Engineering. 67, 2 (Jun. 2025), 67-73. DOI:https://doi.org/10.31276/VJSTE.2024.0054.