Building strength in the muscles surrounding your knees especially the quadriceps, hamstrings, and calves, helps distribute pressure evenly and protect the joint. Exercises like leg presses, squats ...

So, it's a collagen implant to help the ACL heal,” said Dr. Wilkes, an OrthoCincy orthopedic surgeon. Here’s how it works: Stitches are placed around the ACL tear to stabilize it.

We asked dermatologists how collagen for the skin works, what to look for and how it can improve the look of fine lines, wrinkles, sagging skin and other aging concerns.

Hyaluronic acid, retinol, collagen and vitamin C all provide benefits for the skin. Some can be obtained through moisturizers, serums and foods, while some are produced naturally.