Is Thymosin Alpha-1 prohibited in sport?
Current sport-status snapshot for Thymosin Alpha-1: Not specifically named in the 2026 WADA List; athletes should verify current status and product contents.
DIRECT ANSWER
Thymosin Alpha-1 sport status.
Current sport-status snapshot for Thymosin Alpha-1: Not specifically named in the 2026 WADA List; athletes should verify current status and product contents.
Reviewed August 8, 2026. Each statement links to its evidence record, followed by the primary and official sources used for this answer.
Not specifically named in the 2026 WADA List; athletes should verify current status and product contents.
Open evidence recordNo FDA-approved thymosin alpha-1 drug product identified in the August 2026 source snapshot; products are used in some countries outside the United States.
Open evidence recordAnti-doping rules and product ingredients can change. Athletes should verify the current official list and their product before making a real decision.
Open evidence recordPRIMARY & OFFICIAL SOURCES
Sources for this answer.
3 source records, with duplicates removed.