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, it’s no surprise that collagen has become a widely sought-after ingredient in the wellness and beauty communities. But collagen’s efficacy is still pretty up in the air. Frustrated? Here’s what we know. Some studies show that taking collagen supplements for several months can improve skin elasticity.Credit:iStock What is collagen? Collagen is one of the most abundant proteins in the body. In fact, collagen is "the main structural protein that forms the connective tissue throughout our body, from skin to bones, muscles, tendons and ligaments," said Dr. Shari Marchbein, a board-certified dermatologist based in New York. It’s no wonder that the bottled up version of this protein […]