There are many health conditions which are successfully treated with essential oils, and many more which are being evaluated scientifically. Unlike most conventional drugs or botanically based remedies, essential oils work through one (or both) of two distinct mechanisms of action. Essential oils have a physical effect on the mind and body through sensory memory. Essential oils also produce physical effects on the body through chemical actions, just like other drugs and botanical products.

Cancer is a major public health problem in many areas of the world. Lung cancer is the leading cause of cancer-related mortality worldwide, in both men and women. Prostate cancer is the second leading cause of death from cancer after lung cancer. Breast cancer, is the most frequently occurring cancer in women and the major cause of cancer deaths worldwide. Several agents including life habits, exposure to chemical agents, and diet have been correlated with risk of cancer development. Besides, pharmacological or nutritional intervention can significantly affect patients’ quality of life by delaying cancer progression.