Lecithin is a mixture of fats that are essential to cells in the human body. It can be found in many foods, including soybeans and egg yolks.

In the diet, lecithin is the main source of choline, a nutrient similar to the B vitamins. Lecithin is converted into acetylcholine, a substance that transmits nerve impulses.

People use lecithin for Alzheimer disease and dementia, Parkinson disease, and many other conditions, but there is no good scientific evidence to support these uses.

How does it work ?

Uses & Effectiveness ?

Likely InEffective for

  • Alzheimer disease. Taking lecithin by mouth doesn't seem to improve mental abilities or slow the progression of Alzheimer disease.
There is interest in using Lecithin for a number of other purposes, but there isn't enough reliable information to say whether it might be helpful.

Side Effects

When taken by mouth: Lecithin is commonly consumed in foods. It is likely safe when taken as a supplement in doses up to 30 grams daily for up to 6 weeks. It can cause some side effects including diarrhea, nausea, stomach pain, or fullness.

When applied to the skin: Lecithin is likely safe for most adults.

Special Precautions and Warnings

Pregnancy and breast-feeding: Lecithin is commonly consumed in foods. There isn't enough reliable information to know if lecithin is safe to use in larger amounts as medicine when pregnant or breast-feeding. Stay on the safe side and stick to food amounts.

Egg or soy allergy: Lecithin might cause allergic reactions in people with egg or soy allergies.

Interactions ?

We currently have no information for LECITHIN Interactions.


Lecithin has most often been used by adults in doses of 20-30 grams by mouth daily. Speak with a healthcare provider to find out what dose might be best for a specific condition.

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CONDITIONS OF USE AND IMPORTANT INFORMATION: This information is meant to supplement, not replace advice from your doctor or healthcare provider and is not meant to cover all possible uses, precautions, interactions or adverse effects. This information may not fit your specific health circumstances. Never delay or disregard seeking professional medical advice from your doctor or other qualified health care provider because of something you have read on WebMD. You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you.

This copyrighted material is provided by Natural Medicines Comprehensive Database Consumer Version. Information from this source is evidence-based and objective, and without commercial influence. For professional medical information on natural medicines, see Natural Medicines Comprehensive Database Professional Version. © Therapeutic Research Faculty 2018.