L-Glutathione Reduced is a white crystalline powder with a purity of 98.0-101.0%, meeting USP food-grade standards. It is freely soluble in water, has a bulk density of 0.45-0.5 g/ml, and contains minimal heavy metals (≤10 ppm). This antioxidant is microbiologically safe, free from E. coli, Salmonella, and Staphylococcus aureus. Ideal for food and supplement applications, it should be stored in a cool, dry place.