When you talk about collagen, you probably think of tighter skin, but the benefits of collagen are great and go beyond just a youthful appearance. Collagen is the most abundant protein in your body and is responsible for youthful and firm skin, strong nails and healthy hair, but collagen also strengthens your bones, joints, tendons, blood vessels and organs. When we are young, our body produces enough collagen, unfortunately this production already decreases with the age of 25 and from the age of 40 this decrease is even faster. A number of factors also play a major role here, such as ...