Vitamin B12, sometimes also called cobalamin, is one of the largest and most studied of the B complex vitamins This group of vitamins known as B-complex because of biochemical similarities and their close interaction and interdependence in the exercise of their many vital functions. Thus, vitamin B complex are often found together in a variety of common sources of food, and every water-soluble, are secreted from the body together. A deficiency of one of the complex is almost always accompanied by a deficit for each of others. But all that being said, the consequences of failure are different for each vitamin, and deficiency of vitamin B12 are mainly associated with cardiovascular disease, a form anemia, Alzheimer's disease and other dementias, and depression.Vitamin B12 is needed for the construction of the body of the essential amino acid, methionine and the enzyme involved, methionine synthase, an insufficient supply of which could lead to an excess of homocysteine , a protein found naturally in the body, which is known to be associated with an increased risk of cardiovascular disease. But, it is now known that people with Alzheimer's disease is often found at low levels of vitamin B12 in the blood and have high levels homocysteine, which are also associated with vascular dementia frequently. In fact, some studies have suggested that low vitamin B12 and high homocysteine ​​levels can be up to two times the risk of Alzheimer's disease. While conventional medicine remains reluctant to accept a causal relationship, it seems that the “intelligent layman” who is interested in these cases that such a link is more likely. This is especially true when you consider that lack of vitamin B12 in decreased synthesis of methionine, which is known to be essential for methylation reactions, in turn, is essential for healthy nerve cells and found a strong link between neurotransmitters.Research Associations of vitamin B12 deficiency and depression, which is widely used in and out, but still poorly understood and defined conditions. In fact, several studies have suggested that up to 30% of patients with depression severe enough to hospitalization may be a lack of vitamin B12, and the elderly found a lack of vitamin twice as likely to suffer from major depression than those with normal blood levels. Again conventional “wisdom” I prefer these results as an association of observation rather than evidence of a causal relationship. But it is argued that such a link may be due to B12 has a recognized role in the synthesis of methionine and related enzymes, which are vital for the effective implementation of some neurotransmitter whose absence is known to be a factor in Alzheimer's depression.Evidently Alzheimer's, dementia and depression are all conditions that more frequent and severe with age, it is perhaps not surprising that deficiencies of vitamin B12 are also more likely among older people. In fact, less than 10 -15% over 60 years can be a serious deficiency, but a much higher percentage is probably below the threshold required for optimal protection against this dreaded diseases.However visit, these deficits are probably due to a low dietary intake. The recommended daily allowance (RDA) for vitamin B12 was only 2.4 micrograms per day, an amount that should be easily accessible, except perhaps for those following a strict vegetarian diet, since about 3 g of fish or meat Red can provide the amount. For those with a taste for it, more seafood and chicken, turkey, eggs, milk and cheese are also useful, though less exuberant sources.But a good shot of vitamin B12 in food is highly dependent on the acidity of the stomach and digestive enzymes normally, the amount and effectiveness of which decreases significantly with the aging of the body, and the presence in the stomach of a specialized protein called intrinsic factor. The proper functioning of the intrinsic factor requires the presence of enough calcium in the body, another nutrient, which the elderly are of course well known probably deficient. Absorption B12 in supplements is much less problematic, though, because the stomach acid and Digestive enzymes are not required to release the vitamins link proteins. So it's a rare case in which conventional medicine, even

The full story can be read/found on Men Multi Vitamin.com