PEOPLE with low vitamin B-12 low in the blood a decade now, after testing, showed early signs of dementia, the disease decreased mental abilities and one's memory. Dementia can affect your way of thinking, planning, and memory recall.
However, blood tests commonly performed are not sufficient to detect vitamin B-12. Vitamin B-12 appears only when the researchers looked at methylmalonic acid (which increases when the body lacks vitamin B-12) or holotranscobalamin (indicating active vitamin B-12).
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