It will make your skin look dewy and fresh, your bones and nails strong, and your joints pain-free. These are the claims made by the countless manufacturers of collagen supplements that come in the form of powders, pills and creams. For that reason, itโ€™s no surprise that collagen has become a widely sought-after ingredient in the wellness and beauty communities. But collagenโ€™s efficacy is still pretty up in the air.

Frustrated? Hereโ€™s what we know.