Doctor’s Best Collagen Types 1 and 3 contains pure collagen protein from Peptan®, which contributes to the growth and maintenance of healthy tissues.* Collagen is the structural protein essential for the strength and flexibility of bones, joints, tendons, ligaments, hair, skin, nails, and other tissues throughout the body.* Vitamin C is added to the formula as an important nutrient required for collagen synthesis by the body.* • Helps support healthy hair, skin and nails* • Helps support the strength and flexibility of bones, joints, tendons and ligaments* • Provides improved bioavailability due to the low molecular weight of component peptides*