dr. steven gundry to find out. how did you come up with this idea?i used to be 70 pounds bigger than i am now, despite running 30 miles a week and going to the gym one hour a day. and so i eliminated foods that turned on our immune system which are called lectins. we attack ourselves by mistake. >> lectin, what exactly is it? when i pick up this, where is it? >> great, it's in the skin and the seeds of that ma >> and it's in skin and the seeds of that cucumber. traditional societies have actually always peeled and deseeded their cucumbers. >> dr. gundry says there are lectins in lots of plant-based foods like grains, oatmeal, brown rice, and pasta to name a few. >> over the last 50 years we have increased our lectin consumption unknowingly and coinciding with that our autoimmune disease has skyrocketed. >> his solution to eliminate lectins is simple -- >> so the first thing you do is you make some swaps, just like kelly clarkson did. >> i'm going to be real with you, it's real expensive to do. >> so, you get rid of oatmeal. it's a grain, a really nas