They are found in all plants, but raw legumes (beans, lentils, peas, soybeans, peanuts) and whole grains like wheat contain the highest amounts of lectins.

Where is lectin found in the body?

It can also prevent the gut from absorbing nutrients properly. The highest concentrations of lectins are found in healthy foods like legumes, grains, and nightshade vegetables.

Are lectins really bad for you?

Certain types of lectins can prevent your body from absorbing other substances that have nutritional value. This can eventually lead to serious problems such as malnutrition. Some sources of lectins are considered seriously poisonous. Castor beans, for example, contain a potent lectin poison called ricin.