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Health conditions, recent illness, pregnancy, breastfeeding, and allergies are reviewed first
It is worth being clear here: in people with normal B12 levels, injections have not been shown to improve athletic performance or endurance
The right starting point is always understanding why your levels are low, whether supplementation is needed, and what form of B12 is most suitable
(2) Gwyer D, Wragg NM, Wilson SL
Most people feel only a mild pinch lasting a few seconds
human research : Most research has been conducted in rodents and small mammals, so it is not yet clear how these findings may translate to humans
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