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 S4.1: prohibited at all times. Specified. [1]
S4.1 · 2026 rules apply from 1 January 2026. Any 2027 material below concerns future rules from 1 January 2027; it is not current clearance.
Laboratory evidence
Alpha-naphthoflavone, also called 7,8-benzoflavone in the List, was studied as an aromatase inhibitor in human placental microsomes. The cited experiment assessed biochemical inhibition and related chemical derivatives, not treatment outcomes in people. [2]
- Abstract reviewed; laboratory activity does not establish an effective or safe human treatment.
Exposure evidence
WADA’s 2026 explanatory notes say this synthetic substance has been found in supplements. The notice does not identify specific brands, batches or an analytical prevalence estimate. [3]
- This is an official exposure statement, not an independently appraised product-assay dataset.
What remains uncertain
- No verified clinical indication or adequate compound-specific human safety evidence was established. Do not substitute beta-naphthoflavone identity records.
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
- Alpha-naphthoflavone aromatase inhibition study ↗Accessed 2026-11-10 · Primary-study abstract and metadata
Abstract and bibliographic record
- WADA 2026 explanatory notes ↗Accessed 2026-11-10 · Relevant document text opened
p. 1, S3 and S4 explanatory notes
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.