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Vitamin B12 is a water-soluble vitamin essential to many key functions in the body
Results (Be warned this is a tiny study!) 31 patients were in the study, 21 were women, 19 of them were over 65 years old
Research cited by Gameday Mens Health found that oral vitamin B12 absorption was limited to just 50% at low dosages and only 1% at higher dosages, while injected B12 reaches the bloodstream at nearly 100% bioavailability
A smaller quantity may lead to frequent reorders, while a larger quantity may not be suitable if the plan is still being adjusted
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