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Dietary Deficiency: People following a strict vegan or vegetarian diet may have lower B12 intake since its found primarily in animal products

In fact, this group can be deficient in many of our essential vitamins and minerals

The relation of methylenetetradrofolate reductase gene Mutation and Cystathionine -synthase Gene Mutation Exist in cerebral infarction

Furthermore, comparing with CC and CT, schizophrenia patients with TT genotype exhibited greater deficits on the verbal fluency test (VFT) and more difficulties on the Wisconsin Card Sorting Test (WCST), but not in California Verbal Learning Test (CVLT) performance 48