Collagen is a fibrous protein that makes up the connective tissues like the bones, cartilages, skin, hair, and nails. It makes up about 25% of all proteins in the body, making it the most abundant and most important protein for human health. Doctor’s Best Collagen Types 1 & 3 Powder contains pure collagen that supports the growth and maintenance of these connective tissues. It provides the body with the raw materials needed maintain tissue strength and flexibility. Log on to http://www.tasmanhealth.co.nz/doctors-best-collagen-types-1-3-powder/ for more details!!