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While B12 injections are generally safe, they can cause side effects in some individuals, including mild pain at the injection site, nausea, dizziness, or headaches
In vitro studies have documented that GHK-Cu treatment (1-10 M) increases proliferation of outer root sheath keratinocytes by 30-60% and dermal papilla cells by 20-40%, cell populations critical for hair shaft formation and follicle cycling regulation
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