
Peppermint Oil: Is it Toxic?
Peppermint oil is an aromatic and flavoring agent that contains up to 50% menthol. While it is promoted for many ailments, studies showing effectiveness are primarily for some digestive tract illnesses. If small amounts are swallowed, inhaled, or applied to skin or eyes, it can cause irritation and burning. Large doses can cause serious toxicity due to the menthol.