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A review of Vitamin B12 in dermatology

Unverified anecdotal reports from online forums mention various effects, though these cannot be confirmed without proper clinical investigation and may not represent causal relationships: Unverified reports of hormonal changes : Some users mention changes in libido or sexual function, though no causality has been established Theoretical cardiovascular concerns : Based on its purported vascular effects, though no clinical evidence exists Injection site reactions : Pain, redness, or swelling when administered subcutaneously Gastrointestinal symptoms : Nausea or abdominal discomfort in some reports Unknown long-term effects : No data exists on prolonged use or cumulative toxicity A significant safety concern involves product quality and contamination

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