The Amazing Vitamin D
Tuesday, June 29th, 2010For a vitamin that has just in recent years come into the spotlight, vitamin D has sure made a splash. Technically vitamin D doesn’t fit the classic definition of a vitamin. A vitamin is a substance that is crucial to normal everyday life function but can’t be synthesized in sufficient quantities by an organism, and must be obtained from the diet.
Your skin has the ability to manufacture as much as 10,000 IU of vitamin D after just 20-30 minutes of summer sun exposure. But limiting factors like age, skin color, your geographic latitude and seasonal variation in sunlight, plus the necessity of sunblock all play a role in how much vitamin D is actually produced.
Too much sun damages the skin, creating wrinkles and fine lines, while increasing the risk of skin cancer.
Actually vitamin D more closely resembles a hormone than a vitamin. Hormones are chemical messengers produced by certain glands and cells in your body that bind to specific receptors in order to produce a targeted biological response. The active form of vitamin D, calcitriol is one of the most powerful hormones in the body which has the ability to activate over 2,000 genes – roughly 10% of the human genome.
Read the rest of the story in Life Extension, June 2010, p. 74