Lectins are natural carbohydrate-binding proteins found in many common plant foods, including grains, legumes (beans and lentils), nightshades (tomatoes, peppers, eggplant, potatoes), and corn. While they serve as a defense mechanism for plants, lectins can resist digestion in some people and bind to the lining of the gut, potentially triggering inflammation, increased intestinal permeability, and a range of uncomfortable symptoms. Sensitivity to lectins varies widely from person to person and can be amplified by individual factors such as gut health, immune balance, and — importantly — your blood type, as certain lectins interact more strongly with specific blood group antigens.
This 15-question self-assessment uses a simple 1–5 scale to help you gauge your personal level of lectin reactivity. It considers digestive issues, systemic symptoms, pollen sensitivities, reactions to grains/corn, and family history. Combined with your blood type, the results offer personalized insights aligned with the Blood Type Diet principles. Remember, this is for educational and experimental purposes only — not a medical diagnosis.
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