Ask the doctor: Can B vitamins help prevent dementia?
However, since the 1980s, many foods have been supplemented with B vitamins. As a result, substantially fewer people have high homocysteine levels. Therefore, for most people there is not much evidence that B vitamin supplements protect against heart disease or various types of dementia. There are a small number of people who are born with genetic defects that cause high homocysteine levels. B vitamin supplements can dramatically lower homocysteine levels in these unusual people, and that probably offers protection against dementia.?
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