In a decision issued on 4 October 2019, the Badminton World Federation accepted expert scientific evidence that the presence of banned substance clenbuterol (of concentration 0.04ng/mL) in a urine sample provided by a Thai athlete was due to inadvertent consumption of contaminated meat.

The report of the Doping Hearing Panel Decision can be read here:

https://extranet.bwfbadminton.com/docs/document-system/81/210/382/BWF%20v%20%20Ms%20Ratchanok%20Intanon%20_%20BWF%20ID%2035642%20_%20Reasoned%20Deision.pdf