glutathione and tranexamic acid serum Cos De BAHA 10% Facial with EGCG & Review — DermApproved making it suitable for daily use Mary&May Tranexamic Acid + Glutathione

WADA's S0 category prohibits "any pharmacological substance which is not addressed by any of the subsequent sections of the List and with no current approval by any governmental regulatory health authority for human therapeutic use." Because Selank is not approved by the FDA, EMA, or other major Western regulatory authorities, it could be classified as a prohibited non-approved substance under S0, even though it is approved in Russia

Results from a vitamin B12 deficiency test can indicate if levels are lower than normal

The theoretical cancer concern applies to TB-500 as well, though perhaps to a lesser extent

doi: 10.3389/fendo.2021.767785