Potatoes, tomatoes, peppers, eggplant, tomatillos, goji berries and other berries, paprika and tobacco all contain an alkaloid called solanine. There are people who are sensitive to solanine and don’t even know it. People with arthritis are often advised to avoid nightshade plants because they supposedly aggravate joint pain. Some people with a sensitivity to nightshade plants are unable to digest them fully. If you have a sensitivity, you may experience diarrhea, gas, bloating, nausea, painful joints, headaches and depression from consuming nightshades.
What are Nightshades and Should I Avoid Them?