Advice by Trisha Pasricha, MD, MPHJune 19, 2023 at 6:00 a.m. EDT Q: Why do I feel better after cutting nightshades from my diet? Should everyone avoid eating them? A: If you develop inexplicable gastrointestinal symptoms after eating nightshades, which include tomatoes, white potatoes, eggplants and peppers, you may have a food intolerance, or “sensitivity,” to them....