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What You Can Expect After a B12 Shot Most people notice a difference within a few days sometimes even within hours
The NIH Office of Dietary Supplements and the American Academy of Family Physicians identify the following groups as most vulnerable: Adults over 50 Age-related decline in stomach acid production reduces the ability to release B12 from food proteins
Most importantly, arrive with realistic expectations
Most products provide 500 to 1000mcg of B12, despite the Recommended Daily Allowance (RDA) being significantly lower
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