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as levels normalise, improved daytime energy may temporarily affect sleep-wake cycles Individual sensitivity : A small subset of people may be more sensitive to changes in B vitamin levels Formulation factors : Some B12 supplements contain additional ingredients that could affect sleepalways check product labels for stimulants like caffeine For the vast majority of people, vitamin B12 supplementation does not cause sleep disturbances when taken as directed
What the Research Does Not Prove It does not prove safety or effectiveness in humans
If youre over 50 and struggling with joint pain or stiffness, youre not alone
WADA/Sports: If you are a competitive athlete, beware
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