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Some patients notice improved energy or mental clarity within 2448 hours, whilst others experience no immediate change, particularly if deficiency is severe
Additionally, its ability to optimize energy utilization may help maintain lean muscle mass during weight loss
But it is still unclear whether B12 injections can promote weight loss in humans
SUBJECTIVE WELL-BEING AND MENTAL CLARITY Beyond metabolic measures, research participants frequently report improved mood, mental clarity, and subjective well-being
There may be moderate side effects, such as mild discomfort at the injection site
and the conversion of 5-methyltetrahydrofolate to tetrahydrofolate
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