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What Are Vitamins? What Vitamins Do I Need?

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Photo Reporting: Nutrition / DietWhat Are Vitamins? What Vitamins Do I Need?

Vitamins are organic compounds which are needed in small quantities to sustain life. We get vitamins from food, because the human body either does not produce enough of them, or none at all. An organic compound contains carbon. When an organism (living thing) cannot produce enough of an organic chemical compound that it needs in tiny amounts, and has to get it from food, it is called a vitamin.

Sometimes the compound is a vitamin for a human but not for some other animals. For example, vitamin C (ascorbic acid) is a vitamin for humans but not for dogs, because dogs can produce (synthesize) enough for their own needs, while humans cannot.

Put simply, a vitamin is both:

An organic compound (contains carbon).

An essential nutrient the body cannot produce enough of on its own, so it has to get it (tiny amounts) from food.

There are currently 13 recognized vitamins.

According to Medilexicon's medical dictionary:

A vitamin is One of a group of organic substances, present in minute amounts in natural foodstuffs, that are essential to normal metabolism; insufficient amounts in the diet may cause deficiency diseases.

Fat soluble and water soluble vitamins

There are fat-soluble and water-soluble vitamins. Fat-soluble vitamins are stored in the fat tissues of our bodies, as well as the liver. Fat-soluble vitamins are easier to store than water-soluble ones, and can stay in the body as reserves for days, some of them for months.

Water-soluble vitamins do not get stored in the body for long - they soon get expelled through urine.

Water-soluble vitamins need to be replaced more often than fat-soluble ones.

Vitamins A, D, E and K are fat-soluble.

Vitamins C and all the B vitamins are water-soluble.

Fat-soluble vitamins are absorbed through the intestinal tract with the help of fats (lipids).

List of vitamins Vitamin A.

Chemical names (vitaminer) - retinol, retinal, and four carotenoids (including beta carotene).

Fat soluble.

Deficiency may cause night-blindness and keratomalacia (eye disorder that results in a dry cornea)

Good sources - liver, cod liver oil, carrot, broccoli, sweet potato, butter, kale, spinach, pumpkin, collard greens, some cheeses, egg, apricot, cantaloupe melon, milk.

Vitamin B1.

Chemical name (vitaminer) - thiamine

Water soluble.

Deficiency may cause beriberi, Wernicke-Korsakoffsyndrome

Good sources - yeast, pork, cereal grains, sunflower seeds, brown rice, whole grain rye, asparagus, kale, cauliflower, potatoes, oranges, liver, and eggs.

Vitamin B2.

Chemical name (vitaminer) - riboflavin

Water soluble.

Deficiency may cause ariboflavinosis

Good sources - asparagus, bananas, persimmons, okra, chard, cottage cheese, milk, yogurt, meat, eggs, fish, and green beans.

Vitamin B3.

Chemical names (vitaminer) - niacin, niacinamide Water soluble. Deficiency may cause pellagra

Good sources - liver, heart, kidney, chicken, beef, fish (tuna, salmon), milk, eggs, avocados, dates, tomatoes, leafy vegetables, broccoli, carrots, sweet potatoes, asparagus, nuts, whole grains, legumes, mushrooms, and brewer's yeast.

Vitamin B5.

Chemical name (vitaminer) - pantothenic acid

Water soluble.

Deficiency may cause paresthesia

Good sources - meats, whole grains (milling may remove it), broccoli, avocados, royal jelly, fish ovaries.

Vitamin B6.

Chemical names (vitaminer) - pyridoxine, pyridoxamine, pyridoxal Water soluble.

Deficiency may cause anemia, peripheral neuropathy

Good sources - meats, bananas, whole grains, vegetables, and nuts. When milk is dried it loses about half of its B6. Freezing and canning can also reduce content.

Vitamin B7.

Chemical name (vitaminer) - biotin

Water soluble.

Deficiency may cause dermatitis, enteritis

Good sources - egg yolk, liver, some vegetables.

Vitamin B9.

Chemical names (vitaminer) - folic acid, folinic acid Water soluble.

Deficiency may cause pregnancy deficiency linked to birth defects

Good sources - leafy vegetables, legumes, liver, baker's yeast, some fortified grain products, sunflower seeds. Several fruits have moderate amounts, as does beer.

Vitamin B12.

Chemical names (vitaminer) - cyanocobalamin, hydroxycobalamin, methylcobalamin Water soluble.

Deficiency may cause megaloblastic anemia

Good sources - fish, shellfish, meat, poultry, eggs, milk, and dairy products. Some fortified cereals and soy products, as well as fortified nutritional yeast.

Vitamin C.

Chemical names (vitaminer) - ascorbic acid

Water soluble.

Deficiency may cause megaloblastic anemia

Good sources - fruit and vegetables. The Kakadu plum and the camu camu fruit have the highest vitamin C contents of all foods. Liver also has vitamin C.

Vitamin D.

Chemical names (vitaminer) - ergocalciferol, cholecalciferol Fat soluble.

Deficiency may cause rickets, osteomalacia

Good sources - produced in the skin after exposure to ultraviolet B light from the sun or artificial sources. Found in fatty fish, eggs, beef liver, and mushrooms.

Vitamin E.

Chemical names (vitaminer) - tocopherols, tocotrienols Fat soluble.

Deficiency is uncommon. May cause mild hemolytic anemia in newborns Good sources - kiwi fruit, almonds, avocado, eggs, milk, nuts, leafy green vegetables, unheated vegetable oils, wheat germ, and wholegrains.

Vitamin K.

Chemical names (vitaminer) - phylloquinone, menaquinones Fat soluble.

Deficiency may cause bleeding diathesis

Good sources - leafy green vegetables, avocado, kiwi fruit. Parsley contain a lot of vitamin K.

Written by Christian Nordqvist

Source/Copyright: Medical News Today





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