Polyglutamic acid(γ-PGA)(CAS:25513-46-6)

Poly‑γ‑glutamic acid (γ‑PGA) is a water‑soluble, biodegradable natural anionic polymer whose high water‑holding capacity, viscosity, metal‑chelation and tastelessness make it valuable in the food industry. Low‑molecular‑weight γ‑PGA serves as an anti‑freeze agent, thickener and bitterness‑masking agent, improving the texture, moisture retention and shelf life of frozen foods, breads and noodles; in beverages it enhances taste, promotes calcium and magnesium absorption, and prevents tea scum formation. In cosmetics, γ‑PGA’s excellent moisturizing, water‑retention and antioxidant properties are incorporated into creams, masks and sunscreens to increase skin hydration, delay dryness and improve vitamin solubility. Its bio‑flocculating and metal‑chelation abilities make it an ideal additive for environmental water treatment, efficiently removing heavy metals and dyes from wastewater while being readily biodegradable. In pharmaceutical and health care, γ‑PGA is employed as a drug carrier and bio‑adhesive to formulate controlled‑release oral or topical delivery systems, enhancing drug stability and reducing side effects, and as a moist wound‑dressing material that promotes healing. These multifunctional attributes give γ‑PGA broad commercial prospects in food, cosmetics, eco‑friendly water treatment and medical‑health applications, excluding feed uses.