Individuals with B12 deficiency, which can occur due to dietary restrictions (e.g., vegan or vegetarian diets), gastrointestinal disorders affecting absorption, older age, or certain medical conditions that interfere with B12 absorption
This enzyme catalyzes the N-methylation of nicotinamide using S-adenosyl-L-methionine (SAM) as a methyl donor, effectively creating a "metabolic drain" that depletes both NAD+ precursors and cellular methylation capacity
if the precipitate re-dissolves completely with gentle warming and shaking, the solution may be usable
After reconstitution, the solution should be clear or slightly yellow-tinged
People with fatigue, plant-based diets, digestive disorders, or busy lifestyles often benefit greatly from B-12 shots
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