Vitamin A was first identified in 1913 because of its crucial role in vision. Subsequent discovery of its many other duties show that a deficiency will cause a broad range of health problems. Vitamin A is not a single compound but actually comprises a fat-soluble family of molecules that includes retinol, retinal, retinoic acid, and…
The mineral zinc is classified as an essential nutrient due to the vital functions it performs in our bodies. It is found in almost every cell of the body with highest concentrations in the liver, pancreas, kidney, bone, and muscle. High concentrations occur in the brain, middle ear, eye, prostate gland, sperm, skin, hair, and nails.…