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A blood test can determine if you have low B12 levels

Certain medications use sublingual delivery specifically to bypass first-pass metabolism in the liver

Some research suggests that athletes with poor or marginal nutritional status for vitamin B12 may have decreased ability to perform high intensity exercise

By inhibiting NNMT, it alters the balance of S-adenosylmethionine (SAM) and nicotinamide metabolism, affecting DNA methylation patterns and histone modifications

Days Per Week This is where things got interesting because there were a lot of conflicting opinions

But it's not FDA-approved and there isn't an official prescription drug for it