Enzymes help with specific functions that are vital to the operation and overall health of the human body. They help speed up chemical reactions and are essential for respiration, digestion, muscle ...

Manganese is essential for antioxidant defense and cellular protection, as well as bone and cartilage formation. Manganese does not have a Recommended Dietary Allowance. Manganese deficiency is rare.

Euny Hong is the former supervising editor at Investopedia.com. She is also the author of two critically-acclaimed, published books. Dr. JeFreda R. Brown is a financial consultant, Certified Financial ...