Most people know that you can be are intolerant to some foods, such as gluten or dairy products. We have all been down the free from isles at the supermarket, or seen the gluten free options in restaurants. However, there is group of foods that can cause digestive symptoms in some people that most of us are unaware of. There is a group of plants called nightshades or the ‘Solanacae’ family that is made up of over 2000 species and includes the famous deadly nightshade plant.