VITAMINS – VITAMIN A; D; K | Medsarticles. Medical Weblog

VITAMINS – VITAMIN A; D; K

An excess of Vitamin A is recognised to cause certain illnesses, and some explorers in the Arctic and Antarctic who have eaten the livers of seals and polar bears — which contain an enormous quantity of Vitamin A — have died from the effects of this.

Vitamin D is found in fish oils, dairy products, eggs. It is also produced in the body by the action of ultraviolet light on substances in the skin. And so in Australia a deficiency of this vitamin is rare.

Vitamin D is necessary for the calcium and phosphorous metabolism of the body and, so, the normal structure of bone. As with Vitamin A, an excess intake can cause serious symptoms.

Vitamin Ê also is a fat-soluble vitamin, and it is used in the liver in the manufacture of prothrombin, an essential factor in the clotting of blood.

Vitamin Ê occurs in green vegetables, and also some of the bacteria which normally live in the bowel manufacture this vitamin which we absorb and use.

An excess of Vitamin Ê has not been shown to cause any serious side-effects.

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