* Pure Collagen Hydrolysate + Biotin + Vitamin C + Hyaluronic Acid - Zeal Naturals Multi Collagen Protein is the ultimate collagen supplements for women and men to for joint support, stronger nails, and vibrant skin with the added vitamin C, biotin, and hyaluronic acid.* * Our collagen peptides powder comes from the purest sources and goes through a robust hydrolization process to produce the best-tasting collagen powder. If you're not satisfied, contact us for a full refund. *(Our collagen may retain natural flavors and smells that can be undesirable for some consumers because it is completely unflavored and has zero fillers or binders. Mixing the powder in a flavored beverage can mask the natural flavors and smells.