Lectins are widely misrepresented online. Cooking destroys the vast majority of them, and properly prepared beans and grains are staples of the healthiest diets studied. Raw or undercooked kidney beans are the genuine exception.
The foods below are the highest sources of Lectins among the 125 foods in our database, ordered by rel. per 100 g. Treat this as an orientation to which foods sit at the top of the range, not as a complete avoid-list — values vary with variety, growing conditions and preparation, and many foods have never been measured for Lectins.
For how Lectins behave in the body, see the Lectins compound page.
Peanut Butter — the top-ranked source
| Total Fat | 49.4 g |
|---|---|
| Saturated Fat | 8.42 g |
| Sodium | 221 mg |
| Potassium | 654 mg |
| Total Carbohydrate | 22.7 g |
| Dietary Fiber | 6.32 g |
| Total Sugars | 9.2 g |
| Protein | 24 g |
Foods highest in Lectins
- Peanut Butter — 8.00 rel. per 100g. Niacin, vitamin E, magnesium (natural
- Whole Wheat Bread — 7.00 rel. per 100g. Manganese, selenium, B vitamins
- Black Beans — 6.00 rel. per 100g. Folate, magnesium, anthocyanins (values for cooked)
- Edamame — 6.00 rel. per 100g. Folate, vitamin K, isoflavones
- Chickpeas — 6.00 rel. per 100g. Folate, manganese, iron
- Lentils — 5.00 rel. per 100g. Folate, iron, manganese (values for cooked)
- Tofu — 4.00 rel. per 100g. Calcium, manganese, selenium
- Tomato — 4.00 rel. per 100g. Vitamin C, potassium, lycopene
- Red Bell Pepper — 4.00 rel. per 100g. Vitamin C, vitamin A, vitamin B6
- Quinoa — 4.00 rel. per 100g. Manganese, magnesium, folate (values for cooked)
How to reduce Lectins in what you already eat
How to Reduce Lectins
Lectins are proteins denatured by moist heat — properly cooked beans are safe; raw or under-cooked ones are not.
| Method | Typical reduction | How it works |
|---|---|---|
| Boiling (≥100°C, 10–30 min) | up to ~99% | Fully boil soaked legumes; never eat raw or slow-cooked-only kidney beans. |
| Pressure cooking | near-total | The most reliable way to deactivate legume lectins. |
| Soaking, then boiling | aids removal | Discard the soak water before cooking. |
Common questions
Do I need to avoid these foods? Almost certainly not, unless a clinician has advised it for a specific diagnosis. Most of the foods on this list are nutrient-dense and worth eating; the ones at the top are simply where Lectins concentrate.
Does cooking change Lectins content? Often, yes — preparation method can matter as much as food choice. The reduction table above covers what is known for Lectins.
Is this list complete? No. It ranks the foods we hold measured Lectins data for. A food’s absence here means we have not mapped it, not that it is low in Lectins.
This page is general information, not medical advice. If you are managing a diagnosed condition, decisions about restricting Lectins should be made with your clinician or a registered dietitian.
Scientific references & clinical evidence
This guide is built on peer-reviewed research — verify the primary sources below.