Meltdbutta

Vitamin D is a fat soluble family of compounds known as vitamins D1, D2 and D3. It is obtained from food, and, uniquely among the vitamins, it can be made in the skin through the action of SUNLIGHT.

What does it do for your body?

The biologically active form of vitamin D is a hormone known as calcitriol.

BONE - The most important role of vitamin D is to regulate the absorption and use of calcium and phosphorus, which are vital for normal growth and development of bones and teeth. Vitamin D stimulates intestinal absorption and re-absorption in the kidneys as well as maintaining blood levels of calcium and phosphorus. It enables bones and teeth to harden by increasing the deposition of calcium and may also assist in the movement of calcium across body cell membranes.

CELL GROWTH - Vitamin D is involved in normal cell growth and maturation and so may play a part in cancer prevention. In laboratory experiments calcitriol does seem to have anticancer properties, inhibiting the growth of human colon cancer, skin cancer, breast cancer and prostate cancer in test tube experiments.

THE IMMUNE SYSTEM - Vitamin D may also be involved in immune system regulation and play a part in the prevention and treatment of infectious diseases. Parts of the bone marrow which produce immune cells are receptive to vitamin D.

FERTILITY - Vitamin D is essential for strong pelvic bones and therefore plays an indirect role in fertility.

HORMONES - Vitamin D plays a role in the secretion of insulin by the pancreas thus aiding in the regulation of blood sugar. It also affects the parathyroid gland and a hormone that it produces.

NERVOUS SYSTEM - Vitamin D ensures the functioning of healthy nerves and muscles by regulating the level of calcium in the blood. Calcium is vital for normal nerve impulse transmission and muscle contraction.

Absorption: - When taken orally vitamin D is absorbed with fat through the intestinal walls. Vitamin D can be stored the fat cells of the liver, skin, brain and bones in amounts sufficient for many months consumption. Exposure to sunlight in spring, summer and autumn makes up for any shortfall in dietary vitamin D and even short exposure to sunlight during these times is adequate although there may be problems in winter months in some climates. Babies under 12 months have stores of vitamin D which they accumulate while in the womb.

The production of vitamin D in the body is blocked by anything which blocks ultra violet light including skin pigment, smog, fog, sunscreen, windows and hats.


taken from
http://www.go-symmetry.com/vitamin-d.htm


melty

Candytan

The production of vitamin D in the body is blocked by anything which blocks ultra violet light including skin pigment, smog, fog, sunscreen, windows and hats.

Tan NUDE!

fungirlz

......
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