Most evidence for BPC-157s efficacy and safety comes from animal studies, with limited human clinical data available
Though allergies to cobalt are rarely dangerous, taking any form of B12 supplement, whether by injection, tablet, or topically applied gel, may result in an uncomfortable, itchy rash
External factors, such as lifestyle or environmental exposure like smoking or pollution, play a role as well
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Always read product labels and check ingredient lists for potential allergens