Peppermint oil is defined by its high menthol content (35-45%), which activates TRPM8 cold receptors to produce an unmatched cooling sensation among the mint family, accompanied by a sharp, penetrating freshness. Its antispasmodic action on intestinal smooth muscle makes it one of the best-studied herbal remedies for gut complaints: a double-blind placebo-controlled trial found that 75% of IBS patients given enteric-coated peppermint oil capsules achieved a >50% reduction in total symptom score versus 38% on placebo.^[1] Broad phytochemical reviews confirm additional analgesic, anti-inflammatory, and antimicrobial activities driven by menthol and menthone.^[2]