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WADA Prohibition The World Anti-Doping Agency classifies both peptides as prohibited substances: Both listed under Section S0 (Non-Approved Substances) Prohibited at all times (in and out of competition) No Therapeutic Use Exemptions (TUEs) available for either peptide Detection methods under development for anti-doping testing TB-500 and thymosin beta-4 explicitly banned since 2011 WADAs position reflects that neither peptide has regulatory approval from any health authority worldwide
Evidence boundary The largest Phase 2b trial used oral dosing for 24 weeks and did not show statistically significant weight loss versus placebo
Vitamin B12 Absorption and Age Interestingly, the absorption of vitamin B12 from the gut does not decline with age in normal elderly humans
This is to ensure rapid replenishment of body stores to prevent irreversible consequences of deficiency
