Nightshade foods all contain alkaloid compounds that are naturally produced by the plants to protect them against insects. Some people may be sensitive to these compounds and experience problems with nerve, muscle and joint function or digestion. Cooking lowers the alkaloid content of these foods by 40-50%, but that may not be enough to allow highly sensitive people to enjoy them. Anyone who suspects they may be sensitive to nightshade foods can safely eliminate them for 2-3 weeks to see if it improves their condition.
Tomato – Eaten raw on sandwiches and in salads; squeezed for juices; widely used to make sauces, soups, curries, casseroles; found in condiments such as catsup, salsa, relish.