Lecithin is possibly effective in treating liver disease, according to WebMD. Lecithin reduces the amount of fat in the liver of patients who are fed intravenously. Supplements that contain lecithin treat dementia, gallbladder disease, high cholesterol, eczema and certain types of depression.
Lecithin serves as a food additive to keep ingredients from separating in a mixture. Skin moisturizers contain lecithin as a main ingredient. Lecithin helps keep eye medications in contact with the cornea. The substance is a fat essential to every cell in the body, and lecithin is found naturally in soybeans and egg yolks, notes WebMD.
Pharmaceutical companies use lecithin as a source of choline for dementia treatments. Lecithin is a type of phosphatidylcholine, which include substances that help brain functions such as memory. Studies done on lecithin as a treatment for brain disorders achieved variable results, according to Drugs.com. Lecithin also seems to help lower cholesterol, even though studies in the 1970s and 1980s were inconclusive in patients with hardened arteries. Lecithin has been touted as a substance that helps the immune system, even without clinical trials as of November 2014.
The recommended dosage of lecithin for neurological conditions varies between 1 and 35 grams, states Drugs.com. The substance has no known contraindications and side effects are rare. Toxic levels have not been established.