Oregano oil is a common choice for SIBO thanks to carvacrol, but form matters....

https://www.yankee-bookmarkings.win/for-sibo-many-prefer-capsules-over-liquid-to-skip-the-aftertaste-look-for

Oregano oil is a common choice for SIBO thanks to carvacrol, but form matters. Many prefer capsules over liquid to avoid the potent taste. If you are working with a practitioner, a 2 to 4 week window is a typical timeframe to assess your comfort.