Peppermint essential oil is u003cstrongu003emuch more concentratedu003c/strongu003e than the extract. If you choose to use the oil, I would only use 4-5 drops. (Be careful when adding it in!) You also want to make sure that you're using food grade essential oils that are PURE, and not mixed with other oils. If the oil doesn't have nutrition facts, it's not meant to ingest. Personally I use u003ca href=u0022https://www.doterra.com/US/en/site/freshwaterpeachesu0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003eu003cstrongu003eDoterrau003c/strongu003eu003c/au003e, but any quality oil will work! *affiliate link*