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Patients describe "noticeable" or "significant" energy improvement beginning 2-3 days post-injection, peaking at days 4-5, and gradually declining by day 10-12
The exact dose depends on your specific needs and what your doctor says
B12's star power Still, some people swear by B12 shots
Individual Metabolism and Storage Individual Metabolism and Storage Everyones body processes and stores vitamins slightly differently
Likely related to niacin-like vasodilation from rapid B12 absorption
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