Potatoes & Bell Peppers
Potatoes are known to contain high levels of starch. They are also rich in lectins. The amount of lectin depends on the type. For example, white potatoes contain higher amounts of lectins than sweet potatoes. Foods containing high levels of lectin may lead to digestive disorders. Various studies also link them to type-1 diabetes [2] and rheumatoid arthritis [3].
According to studies, peppers contain high levels of lectin with antifungal properties. Nightshade vegetables such as bell peppers, potatoes, and tomatoes contain lectin. Doctors advise people with certain gastrointestinal disorders to stay away from these type of vegetables. Research shows that eating raw bell pepper causes flatulence and excess lectin ingestion.