NOW Foods Peppermint Oil is a 100% pure essential oil steam-distilled from Mentha piperita — one of the most versatile, researched, and popular essential oils available. Rich in menthol and menthone, peppermint oil has demonstrated clinical efficacy for tension headache relief when applied topically to the forehead, improved cognitive performance and alertness when inhaled, respiratory comfort and airway opening during diffusion, and nausea relief via aromatherapy. In natural product formulations it provides a cooling, refreshing sensation and potent antimicrobial activity. NOW Foods verifies menthol and menthone content through GC/MS testing to confirm therapeutic quality and purity. Always dilute in a carrier oil before skin application — neat peppermint oil can cause sensitization. Keep away from the faces of infants and young children.