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These associations were independent of demographic, socioeconomic, lifestyle factors, use of medications that could have an effect on serum vitamin B12 levels, dietary supplement use and fasting time

Older Adults: As we age, the bodys ability to absorb B12 decreases, making supplementation important for older adults

Exercise Plateau: Physical activity is crucial, but over-reliance on exercise without addressing metabolic dysfunction can result in diminishing returns

Various illnesses, such as chronic inflammation of the intestines or years of taking certain stomach acid-inhibiting drugs, can lead to a deficiency of vitamin B 12

CDC summarizes USP guidance: date an opened multi-dose vial at first puncture and discard it within 28 days unless the manufacturer states another opened-vial date. The dose count and 28-day window together require three vials for the 12-week protocol