Oregano oil is a common SIBO support tool. I prefer capsules over liquid-they...

https://www.thistradinglife.com/health/best-oregano-oil-capsules-for-sibo-top-rated-supplements-for-gut-health-support

Oregano oil is a common SIBO support tool. I prefer capsules over liquid-they bypass the upper gut to prevent burning. Look for high carvacrol content, the active compound