By: James Taylor / Reuters Vitamin C is the most important component of vitamin C-rich fruits and vegetables and it plays a critical role in protecting the body against many diseases, including cancers, heart disease, diabetes and high blood pressure.
The main form of vitamin c, vitamin C 6 , is found in the skin, muscle and connective tissues.
The other forms of vitamin a, vitamin A, are also important, but they are mainly found in animal foods and are not used in the human body.
The body converts the other forms to vitamin A. There are many other important components of vitamin A such as alpha-tocopherol and riboflavin.
Vitamin A is also used as an antioxidant.
The key to understanding the effects of vitamin B12 and B6 is that they are not produced by the body and are absorbed through the skin and are therefore not metabolised.
Instead, the body uses them to absorb certain compounds, such as vitamin B6.
In contrast, the liver is the major organ in the body that converts the B12 from the food into the essential amino acid l-ascorbic acid, or lecithin.
L-ascorbic acid is a precursor of vitamin D3 and the body needs this precursor to synthesise the other essential vitamin D. Lecithin, which is found mainly in the tissues of the body, is a cofactor for the synthesis of vitamin E. The liver is also essential for the production of the neurotransmitter serotonin.
The amount of vitamin I that is needed for normal metabolism is higher than the amount of the other minerals, including calcium, iron and zinc, in most people.
However, some individuals have lower amounts of vitamin J. There is an imbalance in the amount and type of vitamin K in the brain.
Vitamin K is a fat soluble vitamin that helps regulate blood pressure and can play a role in many diseases.
In addition, it is thought to protect the liver from cancer.
It also protects against heart disease and some types of diabetes.
Vitamin C The body synthesises vitamin C from its own vitamin A and is the first step in its synthesis of the essential fatty acids l-palmitate and l-cholecalciferol.
This process takes about seven to eight days.
It is a form of beta-carotene that is converted into carotenoids, which are antioxidants and protect the body from free radicals.
The vitamin C is then further converted to vitamin B3, vitamin B2, vitamin D and vitamin E in the liver.
The breakdown of vitamin-C-rich foods is very rapid, although the liver converts the product to the two forms of the vitamin A that are needed for healthy metabolism.
This means that some foods that are fortified with vitamin C will have a higher concentration of vitamin G and less of the active form of the nutrient.
The concentration of the latter forms of these vitamins can also be higher than that of the more active form.
The active form is found most in foods that contain vitamin A-rich foodstuffs.
These include meat, fish and fortified cereals.
Vitamin B-12 The body produces vitamin B-13 which can be found in certain foods, such a salmon or tuna.
The human body makes about 30 per cent of its vitamin B1 by the action of vitamin M, which breaks down the active vitamin A to form vitamin B7.
The remainder of the remaining vitamin B is produced by a process called the B-1-1 cycle.
The remaining 20 per cent is converted to form B-2 and B-3.
The conversion of vitamin H into vitamin B9 is a critical step in the conversion of B-6 to vitamin C. The levels of the vitamins in the blood are high, which means the body will absorb some of the B9 in food, especially if it is high in the form of l-alpha-tocotrienol, a fatty acid found in some fruits and in some vegetables.
The skin, muscles and connectives of the human eye absorb more vitamin B13 from the foods they are consumed from.
Vitamin E The body makes vitamin E from the fatty acids in fatty fish, milk, nuts, seeds, flax seeds, soybean oil and other foods.
The process of converting the B6 to B12 is very fast.
The level of the two B12 forms varies depending on the food, but the conversion is rapid and the level of vitamin e in the diet will decrease over time.
Vitamin D The body does not produce vitamin D from vitamin A or from vitamin D2, but it does make vitamin D indirectly from vitamin B10, which the body converts into vitamin D, a hormone that stimulates the production and production of nerve cells.
It does not convert the vitamin D form directly into vitamin A; instead, it synthesises the vitamin from the other form.
Vitamin O In the human skeleton,