Some people take lecithin to treat conditions related to the brain, such as Alzheimer's and other forms of dementia, according to WebMD. Lecithin may also be used to treat anxiety and some types of depression.
Lecithin may also be effective in treating liver disease, gallbladder disease, eczema and high cholesterol, notes WebMD. Some people believe that lecithin moisturizes the skin, and it may be added to some eye medicines to help with the proper placement of medicine in the cornea. There is not enough evidence to prove the health benefits of lecithin, as of 2015.
Research suggests that taking lecithin may help to reduce symptoms associated with manic-depressive disorder, including hallucinations, delusion and jumbled speech, states WebMD. Lecithin potentially helps people who are fed intravenously to reduce fat accumulation in the liver. It may be taken for head injuries or for memory impairment due to aging, although it is not proven to be effective.
Lecithin may cause some people to feel full, according to WebMD. Other possible side effects include nausea, diarrhea and pain in the abdomen. There is not enough information to determine if lecithin is safe for nursing or pregnant women. For this reason, pregnant or nursing women should not take lecithin.