γ-Poly(L-glutamic acid) is widely used in biomedical applications due to its biocompatibility and biodegradability. It serves as a drug delivery carrier, enhancing the solubility and stability of therapeutic compounds. In the cosmetic industry, it is utilized as a moisturizing agent, improving skin hydration and elasticity. Additionally, it is employed in agriculture as a biodegradable fertilizer additive, promoting plant growth and nutrient absorption. Its ability to form hydrogels makes it valuable in tissue engineering for scaffolding and wound healing. In the food industry, it acts as a thickening and stabilizing agent, enhancing texture and shelf life of products. Its versatility and eco-friendly properties make it a key material in various fields.