Should you take a collagen supplement?

and is it helpful for hair, skin, joints and/or injury prevention?

I get questions about collagen supplementation all. the. time. Some people swear by its ability to strengthen hair and nails, others take it for skin health or to reduce the appearance of wrinkles, and others for relief with joint pain or injury prevention. But what does the science say? Let’s get into it.

First: what is collagen?
Collagen is a protein fo…