(Mentha piperita) has a penetrating grassy, mint scent that's mentally stimulating and energy boosting. It helps increase focus, mental clarity, memory, alertness, and concentration while soothing nervous stress. One of the best essential oils for your first aid kit, Peppermint is believed to help relieve headache symptoms and provide relief from nasal and respiratory congestion caused by allergies or the common cold. Widely known as a digestive aid, Peppermint can be used to alleviate common digestive complaints like bloating, cramping, nausea, motion sickness, and upset stomach. It nourishes dry skin and be used in hair care to relieve scalp irritation and dryness, stimulate hair growth, and give hair a shiny, fresh look.