Some essential oils act as blood-purifying agents, such as the angelica and juniper roots, which, as has been pointed out, support uric acid secretion and are useful in the treatment of gout and rheumatoid arthritis. High levels of urea in the blood accompanying some kidney diseases are reduced by the oil of the chamomile, and lactic acid, a waste product of muscle activity, can be discarded with the help of lemongrass and rosemary oils that are equally effective in treating muscle pain. Marsezos adds that essential oils “enhance blood and lymphatic currents to stimulate the elimination of residual products of colloidal nature.” To my knowledge, there is no solid evidence that essential oils prevent or dissolve deposits (mainly cholesterol) on the walls of (These deposits, called atheromatous plaques, lead to atherosclerosis or hardening of the arteries and sometimes to a stroke or angina pectoris.) Nevertheless, Valne recommends garlic, lemon oils for the treatment of atherosclerosis and can definitely say that in this case, it’s probably for preventive or curative action.