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CAS Clears Ysaora Thibus of Doping Charges Over Kissing Contamination Defense

The tribunal found that nine days of kisses could transfer trace ostarine from her partner’s saliva, resulting in the dismissal of WADA’s four-year ban appeal.

Paris 2024 Olympics - Fencing - Women's Foil Team Classifications 5-8 - Grand Palais, Paris, France - August 01, 2024. Ysaora Thibus of France is seen during the bout against China. REUTERS/Albert Gea
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Overview

  • The decision upholds the International Fencing Federation tribunal’s earlier ruling and permanently ends WADA’s challenge.
  • Judges accepted that Race Imboden’s ostarine use from January 5, 2024, led to cumulative transfer through repeated intimate contact.
  • Expert testimony established that trace amounts of ostarine in saliva can contaminate an intimate partner without deliberate ingestion.
  • CAS ruled that Thibus bore no fault or negligence under strict liability anti-doping rules when the substance entered her system.
  • The ruling secures her eligibility and preserves her results from the 2024 Paris Games, where she placed fifth in team foil and 28th individually.