Description

Essential vitamin required as a cofactor for red blood cell formation, DNA synthesis, and nerve myelination; deficiency causes fatigue, anemia, and neurological symptoms. Injectable B-12 is FDA-approved and standard-of-care for documented deficiency (e.g., pernicious anemia, malabsorption); its inclusion in “metabolic support” or “energy” blends for people without a documented deficiency is a wellness/off-label use, since supplementing beyond normal levels has not been shown to boost energy or metabolism in non-deficient individuals.