But it is not a sustainable solution to vitamin A deficiency.

Some, such as vitamin D, have hormone like functions as regulators of mineral metabolism, or regulators of cell and tissue growth and differentiation (such as some forms of vitamin A).

1. Micronutrient supplements for children (vitamin A and zinc)

Vitamin (B12) as a factor to cure the liver cancer (Not published).

Dark skinned people may be less efficient at making vitamin D because melanin in the skin hinders vitamin D synthesis however, a recent study has found novel evidence that low vitamin D levels among Africans may be due to other reasons.

Monitors won't give you Vitamin D but sunlight will...

Others function as antioxidants (e.g., vitamin E and sometimes vitamin C).

Physiology Factor X is synthesized in the liver and requires vitamin K for its synthesis.

Opponents maintain that there are better ways to deal with vitamin A deficiency.

In general, supplements containing all eight are referred to as a vitamin B complex.

For example, green vegetables typically contain vitamin A, dark orange and dark green vegetables contain vitamin C, and vegetables like broccoli and related plants contain iron and calcium.

It's very destructive, but it also catalyzes the production of vitamin D in the skin, vitamin D being a molecule that we very much need for our strong bones, the health of our immune system, and myriad other important functions in our bodies.

Pregnant or breastfeeding women should consult a doctor before taking a vitamin D supplement.

More than two thirds of children in least developed countries received vitamin A supplements.

B12 that is to be used in these supplements is typically grown from vegan sources (such as bacteria).

Vitamin D The human body can synthesize vitamin D when skin is exposed to ultraviolet radiation from the sun.

UNICEF helped to mount extensive campaigns to immunize children against measles and provide vitamin A.

Within about 20 minutes of ultraviolet exposure in light skinned individuals (three to six times longer for pigmented skin), the concentrations of vitamin D precursors produced in the skin reach an equilibrium, and any further vitamin D produced is degraded.

Palmitate is attached to the alcohol form of vitamin A, retinol, to make vitamin A stable in milk.

The result of the assay was that the liver of the burbot has three to four times the potency in vitamin D, and four to 10 times in vitamin A, than good grades of cod liver oil.

Despite the phasing down of National Immunization Days, vitamin A supplementation coverage remained steady.

UNICEF also ensured that vitamin A was available in the affected areas, as well as in Kenya and the Darfur region of Sudan.

Over those 12 years, about eight million children worldwide died from vitamin A deficiency.

The 4.4 million Filipino kids with vitamin A deficiency might not mind so much.

Expose yourself regularly to the sun or at least to natural light, to get sufficient vitamin D and prevent depression.

In the United Republic of Tanzania and Zambia, UNICEF successfully advocated for the inclusion of vitamin A in national planning frameworks and budgets.

Over 500 million capsules from the Micronutrient Initiative were supplied to 74 countries in 2004.

In June 2005, researcher Peter Beyer received funding from the Bill and Melinda Gates Foundation to further improve golden rice by increasing the levels of or the bioavailability of pro vitamin A, vitamin E, iron, and zinc, and to improve protein quality through genetic modification.

He'd already smuggled vitamin C into the camp, and now he managed to get hold of supplies of marmite on the black market.

To be sure, handing out vitamin pills or adding vitamin A to staple products can make a difference.

For example, recent data show that even a moderate deficiency of Vitamin A results in higher mortality.

But it is not a sustainable solution to vitamin A deficiency. And, while it is cost effective, recent published estimates indicate that golden rice is much more so.

Most physicians in North America and Europe never see a single case of vitamin A deficiency in their professional lifetimes.

Both are great deals. But golden rice would cost just 100 for every life saved from vitamin A deficiency.

Because the problem there is just as severe, but it is more sinister, because vitamin D deficiency, from a lack of ultraviolet B radiation, is a major problem.

Retinyl palmitate is an antioxidant and a source of vitamin A added to low fat milk to replace the vitamin content lost through the removal of milk fat.

In 2004, UNICEF supported vitamin A supplementation programmes in 89 countries with high child mortality.

Every year, about 500,000 children become blind as a result of vitamin A deficiency, and 70 die within a year of losing their sight.

Recent research shows the pivotal role of the stellate cell, a cell type that normally stores vitamin A, in the development of cirrhosis.

From 1996 to 2000, this Commission implemented three major intervention strategies targeting children and pregnant women vitamin A and iron supplementation, fortification of food products and dietary diversification

Greenpeace calls golden rice a failure, because it has been in development for almost 20 years and has still not made any impact on the prevalence of vitamin A deficiency.

The effects of osteomalacia are thought to contribute to chronic musculoskeletal pain, There is no persuasive evidence of lower vitamin D levels in chronic pain sufferers.

The presence of this compound in human skin enables humans to manufacture vitamin D3 from ultraviolet rays in the sun light, via an intermediate isomer pre vitamin D3.

Providing Vitamin A for a year costs as little as 1.20 per child, while providing Zinc costs as little as 1.00.

A study from the British medical journal The Lancet estimates that, in total, vitamin A deficiency kills 668,000 children under the age of five each year.