bowel syndrome with constipation, and in treating tension headaches. Peppermint oil has been found to be an effective antispasmodic during upper gastric endoscopy, and has shown at least some effectiveness as a general GI tract antispasmodic. Peppermint oil may help with "Hell's Itch", an extreme itching sensation that can occur several days after a sunburn. Use as a pest repellent Peppermint oil is commonly used to repel ants, flying insects, rodents, and spiders. Use as a physical performance enhancer Peppermint oil is used in endurance sports to improve mental and physical stamina. References Food additives