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The randomized controlled trial is needed

ARG-BPC-157 is relevant when additional L-arginine delivery is experimentally desired or when enhanced stability at ambient conditions is a research requirement

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[4] Why Vitamin B12 Can Cause Gastrointestinal Symptoms The mechanisms underlying gastrointestinal side effects from vitamin B12 supplementation are not fully established, but several factors may contribute to stomach discomfort in susceptible individuals