vitamin b12 injections drug interactions injection Are B12 Shots Safe? Royal Palm Beach Medical Group Are B12 Shots Safe? Royal

Bottom Line Do not tolerate headaches, which reduces the ability to work and social activity

Additional studies are needed to measure the absorption and retention of methylcobalamin versus cyanocobalamin in healthy adults

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Generally, for those with a diagnosed B12 deficiency or high risk health conditions, injections might be needed once a week initially until levels are normalized

Without it, even the most promising research questions can yield inconclusive or misleading results

However, the absence of human clinical trials means the safety profile in humans is entirely unknown