In some cases, the cosmetic effect of lecithin does as much for the mental outlook of persons as it does for their physical well-being. It has been found to eliminate the yellow or yellow-brown plaques on the skin or around the eyes caused by fatty deposits. It is a natural tranquilliser which is beneficial in nervous exhaustion. It can produce great alertness in elderly people. Some studies have indicated that lecithin increases the gamma globulin in the blood. This helps fight infection. It provides an increased immunity against pneumonia. It has also been found to lower blood pressure in some people. In combination with vitamin E, it has proved helpful in lowering the requirements of insulin in diabetics. It has also proved valuable in the treatment of certain skin ailments, including acne, eczema and psoriasis.