Soya lecithin

Studies in people

• Open question

  Food allergy reactions²

  In children with delayed soya allergy, most reacted to the placebo, not to soya lecithin, though one child had a slight reaction.

• Benefit

  Blood vessel health³

  In postmenopausal women, soy lecithin improved cholesterol balance but did not clearly change blood vessel function.

• Open question

  Soybean allergy risk⁵

  Soya lecithin contains tiny traces of soy proteins, but these rarely triggered allergy antibodies in soybean-allergic patients.

Study type not stated

• Concern

  Soy allergy risk⁶

  Soya lecithin can carry small amounts of soy proteins that some soy-allergic people react to.

Single cases of misuse or overdose

One person or one incident, such as an accidental overdose or a mistake in a kitchen or factory. They are real, but a single case does not show what happens at normal amounts, so the signal does not count them.

• Blood-thinning medicine effect⁴

  In one woman, soya lecithin seemed to stop her blood-thinning medicine from working properly.

How it’s made and used

• Soy protein in foods⁷

  Soya lecithin and some margarines and soy oils were found to contain soy protein.

The signal at the top counts the findings in people and in animal and lab studies. A concern in studies of people outranks animal and lab studies, and “No concerns” needs at least one finding in people. When most findings in people point one way, the page leans that way (“Mostly”), and every finding is still shown. Findings whose study type is not stated are shown but not counted. This page is a reference, not medical advice. It describes what regulators and published research say. Talk to a doctor or dietitian about your own diet.