Anecdotally, some users report experiencing gastrointestinal issues like nausea, diarrhea, or constipation, as well as headache, fatigue, or irritation at the injection site
Vitamin B12 is an essential nutrient involved in: Energy production Nervous system health Red blood cell formation Brain function Metabolism support Low B12 levels can sometimes contribute to fatigue, weakness, and difficulty maintaining energy throughout the day
"2022 Prohibited List: Substances and Methods Prohibited at ALL Times (in- And OUT-Of-Competition)" (PDF)
Tissue repair accelerates
Cross-viral species recognition by coronavirus-reactive T cells has been well described, with SARS-CoV-2-reactive T cells being reported in samples taken before SARS-CoV-2 circulated in humans