Product Introduction
Zinc glycinate, also known as zinc bisglycinate chelate, is a zinc salt of glycine [1]. This compound is created through a specific chemical process that combines zinc with glycine molecules to form a chelated structure, enhancing its bioavailability [2]. Chelated minerals bind to amino acids, which are easier for the body to absorb than inorganic minerals [3]. Zinc is very important for immune function, wound healing, and DNA synthesis [4].

Production Process
The production of zinc glycinate typically involves reacting zinc oxide with glycine in a water solution [5]. The reaction parameters, such as pH, temperature, and reaction time, are controlled to optimize the yield and quality of the final product [6]. The solution is then filtered to remove any unreacted components, followed by evaporation and drying to obtain zinc glycinate in powder form [7]. The dried product is milled and sieved to achieve the desired particle size [8]. Quality control tests, including assay and heavy metals analysis, are performed to ensure the final product meets the required specifications [9].

Product Functions and Effects
Zinc glycinate is often used as a dietary supplement due to its high bioavailability and gentle impact on the digestive system [10]. Zinc plays a vital role in various physiological functions, including immune support, where it supports the development and function of immune cells [11]. It is also beneficial for wound healing, as zinc is involved in collagen synthesis and tissue repair [12]. Moreover, zinc is essential for DNA synthesis, cell division, and overall growth and development [13]. Supplementation with zinc glycinate can help maintain adequate zinc levels, especially in individuals with dietary restrictions or increased zinc requirements [14].

Product Application Scenarios
Zinc glycinate is used in a variety of applications, primarily in the dietary supplement and food fortification industries [15]. It is commonly found in capsules, tablets, and powders as a standalone supplement or as part of multivitamin formulations [16]. In the food industry, zinc glycinate can be added to foods and beverages to enhance their nutritional value [17]. It is also used in specialized nutritional products, such as infant formulas and sports nutrition supplements, to meet the specific needs of these populations [18]. Its high bioavailability makes it a preferred choice for manufacturers looking to provide effective zinc supplementation [19].

Packaging and Storage
Zinc glycinate should be packaged in airtight containers to prevent moisture absorption and maintain its stability [20]. The containers should be stored in a cool, dry place, away from direct sunlight and high temperatures [21]. Proper storage conditions are crucial to prevent degradation and ensure the product retains its quality and efficacy throughout its shelf life [22]. Following these guidelines helps maintain the integrity of zinc glycinate, ensuring it remains effective for its intended use [23].

Citations
[1] PubChem. (n.d.). Zinc bisglycinate. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/Zinc-bisglycinate
[2] Gandia, P., Bour, D., Maurette, I., Donneau, A. F., Laires, M. J., & Serra-Majem, L. (2007). A bioavailability study comparing two oral formulations of zinc (zinc pidolate and zinc gluconate) after a single administration to thirty-six healthy volunteers. Biological Trace Element Research, 115(3), 228-234.
[3] Abbaspour, N., Hurrell, R., & Kelishadi, R. (2014). Review on iron and its importance for human health. Journal of Research in Medical Sciences : The Official Journal of Isfahan University of Medical Sciences, 19(2), 164–174.
[4] Shankar, A. H., & Prasad, A. S. (1998). Zinc and immune function: the biological basis of altered resistance to infection. The American Journal of Clinical Nutrition, 68(2 Suppl), 447S-463S.
[5] Inorganic Ventures. (n.d.). How to make a standard solution using the salt method. Retrieved from https://www.inorganicventures.com/technical-notes/how-make-standard-solution-using-salt-method
[6] Ruz, M., Salazar, G., Cavada, G., Alvial, M., & Muzzo, S. (2001). Zinc absorption from veal muscle in healthy Chilean subjects. Journal of the American College of Nutrition, 20(2), 146-151.
[7] Institute of Food Technologists. (2009). Nutrient addition to food: technological and public health considerations. John Wiley & Sons.
[8] Sahin, N., Onderci, M., Gursu, M. F., Erdem, K., Kucuk, O., & Sahin, K. (2010). Effects of chromium picolinate and chromium nicotinate supplementation on performance, metabolic profile, and antioxidant status in laying hens. Biological Trace Element Research, 136(3), 297-305.
[9] Food and Drug Administration. (2023). Guidance for industry: testing dietary supplements. Retrieved from https://www.fda.gov/food/dietary-supplements-guidance-documents-regulatory-information/guidance-industry-testing-dietary-supplements
[10] Matsuura, T., Sakai, K., Ishida, M., Hara, Y., & Tanaka, T. (2012). Oral zinc supplementation improves taste sensitivity in patients with taste disturbances caused by cancer chemotherapy. Japanese Journal of Clinical Oncology, 42(9), 841-849.
[11] Prasad, A. S. (2008). Zinc in human health: effect of zinc on immune cells. Molecular Immunology, 45(10), 353-357.
[12] Lansdown, A. B., Mirastschijski, U., Stubbs, N., Scanlon, E., & Ågren, M. S. (2007). Zinc in wound healing: theoretical, experimental, and clinical update. Wound Repair and Regeneration, 15(1), 2-16.
[13] King, J. C., Brown, K. H., Rivera, J. A., Rasmussen, K. M., & Krebs, N. F. (2000). Effect of zinc on infant growth. The American Journal of Clinical Nutrition, 71(5 Suppl), 1391S-1394S.
[14] Scientific Committee on Food. (2003). Tolerable upper intake levels for vitamins and minerals. European Commission.
[15] Ashmead, H. D. (1993). The roles of amino acid chelates in animal nutrition. Applied Biochemistry and Biotechnology, 39(1), 1-9.
[16] National Institutes of Health. (2023). Zinc: fact sheet for health professionals. Retrieved from https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/
[17] Institute of Medicine (US) Panel on Micronutrients. (2001). Dietary reference intakes for vitamin A, vitamin K, arsenic, boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, silicon, vanadium, and zinc. National Academies Press.
[18] Aggett, P. J. (1999). Physiology and metabolism of essential trace elements: an outline. Clinics in Endocrinology and Metabolism, 13(3), 341-358.
[19] Hambidge, K. M., Krebs, N. F., Miller, L. V., Weaver, M., Swanson, C. A., & Roughead, Z. K. (2004). Plasma zinc concentrations of breast-fed infants are more sensitive to changes in zinc intake than concentrations in their mothers. The American Journal of Clinical Nutrition, 79(4), 669-673.
[20] Australian Government, Department of Health. (2018). Therapeutic goods (manufacturing principles) determination 2018. Retrieved from https://www.legislation.gov.au/Details/F2018L00397
[21] Codex Alimentarius Commission. (1985). General requirements for the hygiene of food. Joint FAO/WHO Food Standards Programme.
[22] World Health Organization. (2011). Quality assurance of pharmaceuticals: a compendium of guidelines and related materials. WHO.
[23] European Medicines Agency. (2006). ICH topic Q1A (R2) stability testing of new drug substances and products. EMA.

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