How quickly do b-vitamins change in the body?

Depends. Thiamine deficincy sometimes responds in a few hours to replacement. This is an uncommon sitution where you have somebody who is shaky, can't move there eyes, and has profound memory problems who has not eaten properly in quite some time. We see this sometimes with skid row alcoholics. B12 deficiency responds more slowly on the order to weeks to months.

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How quick do b-vitamins change in the body?

B Vitamins. All B vitamins are water soluble and are therefore not stored up in the body and rapidly eliminated, most often by the kidney. Some B vitamins go through a metabolic process in the liver before being excreted by the kidney. It is very difficult to overdose on B vitamins because the body takes what it needs and excretes the rest rather quickly. Read more...