Collagen is a hard, insoluble and fibrous protein that makes up one-third of the protein in the human body. 3 In the majority of collagens, the molecules are packed together to form very similar long thin fibrils. 4. Collagen is the most common protein found in mammals.ere are some key points about collagen. More detail and supporting information is in the main article. 25-27. 1  Protein makes up around 20% of the body's mass, and collagen makes up around 30% of the protein in the human body.
A prolactin test is a blood test that measures the level of the hormone in your body. Find a obsetrician or a gynecologist or a endocrinologist near you.
Prolactin levels may be used for several reasons. Prolactin is a hormone produced by the pituitary gland and its primary role is to help initiate and maintain breast milk production in pregnant and nursing women.Prolactin testing may be used, along with other hormone tests, to help:rolactin is a hormone produced by the pituitary gland and its primary role is to help initiate and maintain breast milk production in pregnant and nursing women. Prolactin testing may be used, along with other hormone tests, to help: