So regardless of what blood tests exhibit, always take a high-quality B12 supplement. (Look for it as methylcobalamin—ideally, blended with adenosylcobalamin—rather than as cyanocobalamin. With methylcobalamin and adenosylcobalamin, your liver doesn’t have to do any work to convert the B12 into a usable form.) Lack of B12 is a very real deficiency with very real health consequences. And as mentioned earlier, almost every person in the U.S. is B12 deficient in some way. Also, take steps to restore your gut’s normal levels of
