Collagen is a type of protein. Certain foods, such as animal skin and ligaments, are rich in collagen. Collagen is also available as a supplement. Many people hoping to support the health of their ...

There’s a reason we tend to feel sleepy around the same time each night — and why, if we don’t set an alarm, we tend to wake up at the same time in the mornings. As long as we’re not pulling ...

Your immune system defends your body against illness and disease. This complex system comprises the skin cells, blood, bone marrow, tissues, and organs that — when working the way they should — ...