Although its often mistaken for the aroma of peppermint, due to the menthol, its menthol content is negligible as compared to that of peppermint oil. Spearmint oil can be a replacement for peppermint when it is unavailable. It can help with irregular periods. It promotes the hormone estrogen which facilitates menstruation and ensures good uterine and sexual health. spearmint also known to have a relaxing and cooling effect on the brain, Helping those to concentrate. It can also help cure headaches and other stress related issues. Spearmint can also help treat asthma. It can also help with spasmodic coughs, giving a cooling and relaxing effect on the nerves. It has the ability to sooth any muscle strain from coughing. Pair with lavender in your diffuser for a relaxing peaceful state of mind.