Doctor's Best Pure Collagen Types 1 and 3 contains pure collagen protein, which contribute to the growth and maintenance of healthy tissues. Collagen is the structural protein essential for the strength of bones and flexibility of joints, tendons, ligaments, hair, skin, nails, and other tissues throughout the body.
Collagen Types 1 and 3 Powder is enzymatically hydrolyzed into component peptides with a small molecular size for optimal absorption and utilization by the body. 7.1 oz. 
Helps support healthy hair, skin, and nails
Helps support the strength of bones and flexibility, joints, tendons, and ligaments
Provides improved bioavailability due to the low molecular weight of component peptides