This shocking revelation from nutritional medicine will shake all health-conscious individuals: Many popular fruits, vegetables, and grains contain harmful proteins known as lectins that can make us sick. Plants use lectins to protect themselves from their numerous predators. We humans are also "enemies" to the plant, and it is now known that certain types of lectins can have a damaging effect on our bodies. It is even suspected that a high intake of lectins in fruits and vegetables can trigger various autoimmune diseases such as Type 1 diabetes, arthritis, Crohn's disease, or irritable stomach, as well as thyroid problems. This guide aims to address the many open questions surrounding lectins. What are lectins, where do they occur, what can they cause? And what options are available?.