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Lectins (raw legumes)
Proteins that bind to sugars on cells. Phytohaemagglutinin in raw or undercooked kidney beans causes acute food poisoning. Proper boiling destroys most of it.
Who reacts
Anyone who eats raw or undercooked beans. Claims that cooked lectins cause chronic disease have weak evidence.
Typical onset
1 hours to 6 hours after you eat it
Linked symptoms
NauseaStrong evidence
DiarrheaStrong evidence
Stomach pain or crampsStrong evidence
BloatingWeak evidence
Joint pain or stiffnessWeak evidence
FatigueWeak evidence
Where you find it
High:Kidney beans (slow cooker / undercooked)
Low:Kidney beans (cooked) · Lentils · Chickpeas / hummus · Soy / tofu / soy milk · Peanuts / peanut butter
Sources
- FDA Bad Bug Book, 2nd ed. (2012) — Phytohaemagglutinin (kidney bean lectin)