I get a monthly injection of vitamin B 12
This article by Cludia Barros Coelho, M.D., Ph.D., overviews some of the claims about dietary supplements and what the research shows to be true
Side effects vary but may include acne or oily skin, changes in libido, mood fluctuations, fluid retention, and changes in red blood cell count
doi:10.3389/fnins.2018.00866
Safety Profile Across all six human trials and the extensive preclinical work, the safety picture is quite clean: No serious adverse events attributed to the compound No effect on IGF-1 No impairment of glucose tolerance or insulin sensitivity No genotoxic activity Most common side effects: mild injection site irritation, occasional headache or fatigue all transient This is genuinely one of the better-characterized peptides from a safety standpoint, largely because it actually went through a formal development process with proper clinical oversight
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