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Oral vitamin B12 versus intramuscular vitamin B12 for vitamin B12 deficiency: a systematic review of randomized controlled trials

Sourander, Andre, et al

Clinical trials tested doses ranging from 250mcg to 1mg daily, with most protocols settling around 300-500mcg for optimal fat metabolism support

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However, the large number of significant correlations noted in this study between Parasutterella relative abundance and EWAT metabolites strongly supports the relevance of this genus to the EWAT metabolome

Tiaminal B12 shots might help some patients more