For over 200 years, Europeans considered tomatoes deadly poison, and they had good reason—the fruit really was killing people. The culprit wasn't the tomato itself, but what it revealed about the plates they ate from.
Today's cooks toss tomatoes into everything from salads to sauces without a second thought, but until the late 1800s, many Europeans and Americans considered them deadly poison. This wasn't mere superstition or botanical confusion—tomatoes really were killing people, just not for the reasons anyone suspected. The story of how tomatoes went from feared killer to kitchen staple reveals a fascinating intersection of chemistry, class, and accidental poisoning.
When tomatoes arrived in Europe from the Americas in the 16th century, botanists immediately recognized them as members of the nightshade family, Solanaceae. This family includes belladonna, also called deadly nightshade, which produces beautiful berries that cause hallucinations, paralysis, and death. The botanical resemblance was undeniable: similar leaf structure, comparable flowers, and those suspicious, glossy fruits.
European herbalists classified tomatoes as dangerous ornamentals, suitable for gardens but never for tables. The plants were called pomi d'oro in Italy—golden apples—and grown primarily for decoration. Wealthy households cultivated them in their estates as exotic curiosities from the New World, admiring their beauty while warning servants and children never to eat them.
The aristocracy had another reason to fear tomatoes: they kept dying after eating them. When wealthy families consumed tomato-based dishes, they frequently experienced symptoms of poisoning—numbness, weakness, sometimes death. Poor farmers and peasants who ate tomatoes seemed to fare better, which deepened the mystery. Was there something about noble blood that made tomatoes more toxic?
The answer lay not in biology but in tableware. Wealthy Europeans ate from pewter plates, beautiful high-tin alloys that demonstrated status and sophistication. The problem was that pewter of that era contained substantial amounts of lead, which leached into acidic foods. Tomatoes, with their high citric and malic acid content, were perfect lead extractors.
When aristocrats ate tomatoes from pewter plates, they were essentially consuming lead acetate, once called sugar of lead for its sweetly toxic taste. The symptoms they experienced—intestinal pain, neurological damage, and in severe cases, death—came from acute lead poisoning. The tomatoes weren't poisonous; they were effective at revealing poison already present.
Peasants, meanwhile, ate from wooden trenchers or simple clay plates. These materials didn't leach lead into acidic foods, so tomatoes posed no danger. The class divide in tomato poisoning cases actually reflected the dangerous gap between wealthy tableware and the chemistry of acidic foods.
Tomatoes' reputation began shifting in the late 1700s and early 1800s. Italian cuisine was already embracing them—the association between tomatoes and Italian cooking we take for granted today was just beginning to develop. Southern Italians, less likely to own pewter and more exposed to culinary influences from nearby regions that had long used tomatoes, found them harmless and delicious.
The legendary turning point in America came in 1820, when Robert Gibbon Johnson allegedly ate an entire basket of tomatoes on the courthouse steps in Salem, New Jersey, before a horrified crowd. Whether this public demonstration actually happened as described is debatable—the story may be apocryphal—but it captures the moment when tomatoes transitioned from dangerous to delicious in the American imagination.
More importantly, changes in food safety, better understanding of lead poisoning, and the increasing availability of glass and ceramic tableware that didn't leach toxins made tomatoes genuinely safe. By the mid-1800s, tomatoes had become staples in American and European kitchens.
The tomato story reminds us that food safety concerns often have complicated roots. The fear wasn't entirely irrational—people were dying, and tomatoes were involved. The error was in identifying the wrong culprit. Today's debates about various foods and health concerns might benefit from similar investigation. Sometimes the problem isn't the food itself, but how we grow it, process it, or what we serve it on.
The next time you slice a tomato for your salad, appreciate that you're enjoying a fruit once reserved for the brave and the poor—a fruit that accidentally exposed the toxic elegance of aristocratic dining and emerged vindicated on the other side.