EPO is a biennial plant that originated in North America but now grows all over the world. The therapeutic oil is made from the seeds of its plant.

EPO is high in polyunsaturated omega-6 fatty acids, which can help reduce inflammation and discomfort. The data regarding EPO's usefulness in lowering rheumatoid arthritis joint discomfort isn't conclusive, however there is some indication that it can help with morning stiffness. Evening primrose oil is taken orally to treat a different types of disorders. It belongs to Herbal medicine of the Onagraceae family. Oenothera biennis is the scientific name for this plant. Other common names include tree primrose, fever plant, night willowherb, King's-cure-all, scabish, scurvish, sun drop, and suncups.

Peppermint is a sweet-smelling or an aromatic plant. It is produced from the intermingling of water Mint and Spearmint. Peppermint extract is produced from the essential oils of peppermint leaves.