Essential oil of lemon is expressed, or squeezed out of the peel of the fruit. It has a refreshing scent which stimulates the liver, has a gentle, calming effect and is perhaps the most effective oil for disinfecting room air using a diffuser. Helps build immunity against colds, influenza, and other viral infection; detoxifies and assists lymphatic drainage; refreshes the mind and helps to improve mental clarity. Soothes stomach cramps and indigestion (especially in children); rejuvenates congested and slack skin; uplifts depression, mood swings, anxiety, and emotional stress.