According to the Centers for Disease Control and Prevention, over 40% of Americans take some sort of supplement each day. This amounts to what Market Watch refers to as a staggering $37 billion industry between multivitamins, supplements, and protein powders. Despite those numbers, there’s a growing amount of research suggesting that supplements are, for the most part, unnecessary.
The knee is the largest joint in the body. People use it heavily every day as they walk, run, climb, or jump. As a result, it is also very prone to injury and pain. When these occur, a doctor may recommend exercises to help a person strengthen the muscles around the knee.