A vitamin produced by the body when exposed to ultraviolet light or obtained from dietary sources. Vitamin D3 is a hormone that has an important role in calcium and phosphorus metabolism. Technically, vitamin D3 is not a vitamin because the body can produce it. Also known as cholecalciferol.
- Vitamin E
In the ATBC cancer prevention trial, men given alpha-tocopherol (vitamin E) had a lower incidence of prostate cancer than men given a placebo. The vitamin E-treated group also had significantly lower death rates from prostate cancer. However, newer studies from a trial called SELECT showed that taking vitamin E can actually be harmful. According to […]
- Vitamin K
particularly prothrombin and also factors VII, IX, and X. Vitamin K1 is made by plants, whereas vitamin K2 is of bacterial origin and is the important form for people. All other forms of vitamin K are converted to vitamin K2 in the body. There are a number of closely related compounds of the vitamin K2 […]
- Vitamin O
Not a true vitamin but rather a pricey health supplement that is composed largely of salt water (plus some germanium, a trace element dangerous to health). The US Federal Trade Commission (FTC) charged the manufacturer of Vitamin O with fraud for touting it as a cure for cancer and heart disease. The FTC said advertisements […]
- Vitamin P
An old name for substances now known as bioflavinoids. They are no longer considered to be vitamins by the strict definition of that word.
- Vitamin requirements, infant
Vitamins are organic substances that are essential in minute quantities for the proper growth, maintenance, and functioning of the baby. Vitamins must be obtained from food because the body cannot produce them. The exception is vitamin D, which can be produced by the skin when it is exposed to the sun. There are four fat-soluble […]