The more energy you use in cold water, the more your body cools off. If you cannot climb out of the water, conserve body heat by remaining as still as possible and reducing the amount of your body exposed to the water. Protect your critical heat loss regions: the head, sides, armpits, and groin.Do not swim unless shore, a raft, or an overturned boat is nearby.hink of hypothermia as the opposite of heat stroke. Cold water dangerously accelerates the onset and progression of hypothermia since body heat can be lost 25 times faster in cold water than in cold air. Hypothermia affects the body's core the brain, heart, lungs, and other vital organs.
Vitamin A is a group of unsaturated nutritional organic compounds, that includes retinol, retinal, retinoic acid, and several provitamin A carotenoids, and beta-carotene. Vitamin A has multiple functions: it is important for growth and development, for the maintenance of the immune system and good vision.itamin A can be found in two principal forms in foods 1  : Retinol, the form of vitamin A absorbed when eating animal food sources, is a yellow, fat-soluble substance. 2  Since the pure alcohol form is unstable, the vitamin is found in tissues in a form of retinyl ester.
What it does for you: The B complex of vitamins (especially B6 and B12) keep blood, nerves, and the immune system functioning properly. A deficiency may be a risk factor for heart disease and stroke. How much you need daily: The recommended dietary allowance (RDA) is 1.3 milligrams for B6 and 2.4 micrograms for B12.