Description

Vitamin B12 is present in foods of animal origin, such as dairy products and eggs. Thus, vegetarians are more prone to a dietary deficiency of this important nutrient. Likewise, low vitamin B12 seems to happen more in elderly individuals than younger groups. It is estimated that 10% to 30% of individuals over the age of 50 cannot properly metabolise vitamin B12. Methylcobalamin is the form of vitamin B12, active in the central nervous system. It is essential for cell growth and replication. For some people the liver does not convert cyanocobalamin, common supplemental form of vitamin B12, into adequate amounts of methylcobalamin needed for neuronal functioning. Methylcobalamin may exert its neuroprotective effects through enhanced methylation, acceleration of nerve cell growth or its ability to maintain healthy homocysteine levels.