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For example, vegans or vegetarians may need to add an extra dose of this vitamin since natural B12 sources mainly come from meat, fish, eggs, and dairy. Risks of Excessive Vitamin B12 Intake As we've seen, vitamin B12 is highly important in the body

These factors determine how well the vitamin is absorbed, stored, and utilized

Simultaneously, the preservation of SAM levels maintains cellular capacity for critical methylation reactions including histone modifications, DNA methylation, and protein methylation that regulate gene expression and protein function

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Learn about the food sources of neurotropic vitamins and the symptoms of B vitamin deficiency.