Eggplants are a delicious and versatile vegetable, however there are some people who should not eat them. People who are allergic to eggplant, or other members of the nightshade family such as peppers, tomatoes, potatoes and tobacco should avoid eating eggplants. Additionally, people with kidney disease may want to limit their intake of eggplant because it contains oxalates which can contribute to kidney stones. For those who suffer from gout, eggplant can worsen symptoms due to its high purine content. Eggplants also contain tyramines which can cause headaches in those who have an intolerance or sensitivity to them. Finally, pregnant women should be cautious when consuming eggplant as it may cause uterine contractions. In conclusion, individuals with allergies or existing health conditions should check with their doctor before eating eggplant or any other food that may aggravate their condition.