Vitamin B12 and Alzheimer's disease

Researchers from the Karolinska Institute in Sweden have added further evidence to the theory that vitamin B12 could help to prevent Alzheimer's disease. The researchers followed 271 people, aged between 65 and 79 at the start of the study, for seven years. Those with high levels of vitamin B12 were at a lower risk of developing Alzheimer's over the course of the study. One of the ideas behind this theory is that vitamin B12 - which is found in meat, fish, eggs and milk - reduces the level of a harmful chemical called homocysteine which is known to raise the risks of both strokes and dementia and the study found that those with higher levels of homocysteine were at greater risk.