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Supplement

Soy Lecithin

Soy lecithin is a fatty substance from soybeans, rich in phospholipids such as phosphatidylcholine, which help build cell membranes and carry fats around the body. With no single main use standing out, the best-supported finding is for high cholesterol, where a small trial found LDL cholesterol improved, though the evidence is limited. Another small study saw cortisol go down, but HDL showed no clear difference, and all of this comes from very small groups.

Best evidence
Grade C
Conditions studied
2
Outcomes
7
Graded outcomes
0021

Evidence by condition

  • Strong
  • Moderate
  • Limited
  • Very limited

2 conditions

High Cholesterol: outcomes studied for Soy Lecithin
GradeOutcomeEffectSizeStudiesPeopleStudies list
Low-density lipoprotein (LDL)

Moderate Improvement

Improves (the measure goes down)Moderate effect30 people
High-density lipoprotein (HDL)

No effect

NoneNo effect30 people
TriglyceridesImproves (the measure goes down)1 study30 people

Studies that measured triglycerides

Total cholesterolImproves (the measure goes down)30 people
Mental Resilience: outcomes studied for Soy Lecithin
GradeOutcomeEffectSizeStudiesPeopleStudies list
Cortisol

Small Decrease

Improves (the measure goes down)Small effect80 people
Heart RateImproves (the measure goes down)1 study80 people
Stress Signs and SymptomsImproves (the measure goes down)80 people

Key findings

  • Low-density lipoprotein (LDL)High CholesterolImproves (the measure goes down)
  • CortisolMental ResilienceImproves (the measure goes down)
  • High-density lipoprotein (HDL)High Cholesterol

Studies cited

2 studies from PubMed

  1. Influence of soy lecithin administration on hypercholesterolemiaCholesterol · PMID 21490917
  2. Effects of soy lecithin phosphatidic acid and phosphatidylserine complex (PAS) on the endocrine and psychological responses to mental stressStress · PMID 15512856