Under review
Thymosin alpha-1 is listed in the CompoundedGuide registry with no verified FDA-approved product. FDA lists Thymosin alpha-1 among bulk drug substances for use in compounding that may present significant safety risks. Thymosin alpha-1 is not on FDA's 503B Bulks List for outsourcing facilities (list checked 2026-07-25). 50 registered ClinicalTrials.gov studies cite Thymosin alpha-1 (18 completed, 11 recruiting, 10 unknown, 5 not yet recruiting, 3 active not recruiting, 2 withdrawn, 1 enrolling by invitation); registration is not evidence of approval, efficacy, or safety. Identity and regulatory status are pending source collection and editorial review. This is not medical advice.