Just a quick video from the folks at Whole Life Nutrition about lentils often being contaminated with gluten containing grains. I have had this issue myself, making a rice/lentil wrap and getting quite ill. I knew the rice was fine as I had used it before and the bag of lentils was brand new, so it had to be the lentils. Just something to consider.
Gluten Cross-Contamination in Lentils from Whole Life Nutrition on Vimeo.