Lemon Oil Citrus limonum Lemon oil is an antibacterial, mood booster, and flavor enhancer. It is popular in natural and commercial cleaning products. Its high terpene content aids in pain relief, reduction of nausea and vomiting, and works on dopamine channels. It aids in cancer, stress, protection from free radicals, and increases concentration and focus. It has the ability to increase the uptake of other nutrients such as Vitamin A, Vitamin B6, Vitamin C, and Vitamin E while providing a flavor popular with both kids and adults.