Checked 2026-11-10. Independent clinical review has not been completed. WADAFUK is independent of WADA and does not provide medical advice or an individual anti-doping determination.
Prohibited at all times
2026 S4.4.1: prohibited at all times. Non-Specified. [1]
S4.4.1 · 2026 rules apply from 1 January 2026. Any 2027 material below concerns future rules from 1 January 2027; it is not current clearance.
Medical-development and safety context
GW501516, also named GW1516 in the List, is a PPAR-delta agonist. WADA’s 2013 alert described its development being stopped after serious preclinical toxicities. HSA’s 2017 warning discussed cancers in mouse and rat studies and an unestablished human safety profile. [2] [3]
- Historical official warnings support a serious hazard concern, not a numerical estimate of cancer risk in humans.
Exposure evidence
The HSA alert documented online bodybuilding products labelled with cardarine/GW501516. This establishes historical marketing context; it should not be described as a new independent chemical assay of current products. [3]
- The separately cited internet-product assay could not be opened and its product-specific findings are not repeated here.
Check the sources.
These are concise editorial paraphrases of selected sources, not a systematic review or a reproduction of source tables. Access depth is shown for each reference; an abstract-only check cannot resolve details found only in a full paper.
- WADA 2026 Prohibited List ↗Accessed 2026-11-10 · Relevant official full-text sections opened
Printed pp. 3, 9–12: introduction, S3, S4 and S5 as applicable
- WADA alert concerning GW501516 (FIA-hosted original notice) ↗Accessed 2026-11-10 · Relevant document text opened
Relevant cited sections
- HSA alert: bodybuilding products sold online contain harmful substances ↗Accessed 2026-11-10 · Relevant document text opened
Relevant cited sections
Check the current official WADA List and the relevant anti-doping authority for your sport, product, route and circumstances. Do not stop or change necessary treatment based on this page. Ask a qualified clinician about health decisions. Missing evidence does not establish safety.