You probably squeeze ketchup onto your fries without thinking twice about it. That familiar red bottle sitting in your fridge seems so ordinary, so American. Yet this condiment has a backstory that’s anything but typical. If you knew the truth about ketchup’s origins, you might never look at it the same way again. The journey from its first appearance to the thick tomato sauce we know today involves fish guts, deadly poison fears, pill-peddling doctors, and a health craze that swept across America. Let’s dive in.
Ketchup Started as Fermented Fish Sauce
Ketchup’s origin begins in 300 BCE China, where Chinese seamen made a fermented fish sauce called ke-tchup. This wasn’t anything like the sweet, tangy condiment we recognize today. The early version was a savory, thin sauce made primarily from fermented fish, involving brining fish entrails, soy beans, and spices together, which fermented for a considerable amount of time, resulting in a pungent and salty liquid. The entire purpose was to preserve food and add that deep umami punch to meals.
Down along the Mekong River, Khmer and Vietnamese fishermen made fish sauce out of salted and fermented anchovies, which the Chinese seamen called ke-tchup, meaning preserved-fish sauce in Hokkien. Think fish sauce you’d find in Thai or Vietnamese cooking today, just with a different name. Fujianese settlers took ke-tchup with them to Indonesia, Malaysia, and the Philippines. This sauce traveled trade routes across Southeast Asia for centuries before Europeans ever encountered it.
British Traders Brought the Idea Back Home
British traders encountered ketchup during trade missions in the 17th and 18th centuries, which set the stage for ketchup as we would come to recognize it. Here’s the thing though: these British traders loved the flavor but couldn’t quite replicate the fermented fish recipe back home. The British attempted to replicate these exotic flavors, substituting ingredients with what was locally available, such as mushrooms and walnuts, which were abundant in the British Isles. So they improvised.
Mushroom ketchup appears to have originated in Great Britain, and in the United States, mushroom ketchup dates back to at least 1770 in English colonies in North America. In the United Kingdom from the 1600s, ketchup was prepared with mushrooms as a primary ingredient, and in the United States mushroom ketchup dates back to at least 1770. These early ketchups tasted more like Worcestershire sauce than anything we’d put on a burger today. They were dark, thin, intensely flavored sauces used to season soups, stews, and meat dishes.
Tomatoes Were Considered Poisonous
When tomatoes arrived in Europe from the Americas during the 16th century, people were terrified of them. Tomatoes were considered poisonous when first introduced to Europe and North America from South America, partly because the plant’s leaves contain toxic compounds. Since tomatoes belong to the nightshade family, Europeans assumed the fruit itself would kill you. Most Americans and Europeans wouldn’t eat tomatoes because they resembled the poisonous nightshade berries.
For decades, tomatoes sat in gardens as ornamental plants while people stayed far away from eating them. English and American doctors led an unlikely 18th century PR campaign, as English physician John Gerard posited that cooked tomatoes, rather than raw ones, could be edible, and by the mid 1700s English doctors were prescribing them as medicine. Slowly, doctors began to change public perception, claiming cooked tomatoes might actually be safe. Still, it would take a full century before Americans trusted tomatoes enough to eat them regularly.
The First Tomato Ketchup Recipe Appeared in 1812
James Mease published the first known tomato ketchup recipe in 1812. James Mease, a scientist and horticulturist from Philadelphia, was one of the first cookbook authors to include tomatoes in a ketchup recipe, and his 1812 recipe included thinly cut tomatoes, brandy, mace, allspice, and salt. Notice anything missing? No vinegar. No sugar. This early version bore little resemblance to modern ketchup. It was more of an experiment, a curiosity in a world still dominated by mushroom and walnut ketchups.
Honestly, it’s hard to imagine anyone getting excited about this watery tomato concoction when rich, savory mushroom ketchup already existed. The tomato version needed serious improvements before it could compete.
A Doctor Started Selling Ketchup as Medicine in 1834
This is where things get wild. In 1834, Dr. John Cook Bennett, a physician living in Ohio, started selling ketchup as a cure for diarrhea, jaundice, and indigestion. According to Bennett, ketchup could cure indigestion, diarrhea, and jaundice, which were common problems in the 1830s when cholera outbreaks swept around the world. Let’s be real: in an era before modern medicine, people were desperate for anything that might help.
Dr. John Cook Bennett claimed that tomatoes had remarkable medicinal properties and could treat indigestion and digestive ailments, and went as far as to patent a recipe for tomato pills in the 1830s. Yes, tomato pills. Bennett didn’t just sell liquid ketchup. He concentrated it into pill form and marketed it as a miracle cure. Bennett’s ketchup cure took off because, unlike many other medicines, ketchup wouldn’t harm the patient, while other patent medicines contained mercury, lead, and cocaine.
The Tomato Pill Craze Exploded Across America
After sales began, copycats flooded the market with their own pills, leading to a war of tomato pills. Soon every charlatan and snake oil salesman was selling their own version of tomato extract. Newspaper ads from 1837 promoted Dr. Miles’ Compound Extract of Tomato, though Dr. Miles was no doctor at all but a merchant who lived in Cleveland, and his ads declared his ketchup medicine could treat syphilis. The claims got more outrageous as competition increased.
Ironically, most tomato pills contained zero tomatoes, as tests on tomato pills found no trace of the plant. These copycats claimed their pills could solve all types of ailments but in truth most just sold laxatives. People were literally buying laxatives marketed as tomato medicine. Eventually, the truth came out.
The Medicinal Ketchup Bubble Burst in 1850
Ketchup’s time in the medical spotlight lasted until 1850 when, after some companies got caught selling laxatives labeled as tomato pills, the demand for medicinal ketchup fell off a cliff. Once the scandal broke, people stopped trusting tomato pills entirely. It all led to the fall of the tomato ketchup empire in 1850. The medical fad died almost overnight.
Yet something interesting happened. It’s largely thanks to these crazy claims that tomato ketchup became popular in the United States, as upon discovering the taste, people began using tomato ketchup as more of a condiment than a cure-all. Americans had gotten accustomed to the flavor. Even though the medicine turned out to be nonsense, people liked the taste enough to keep using it on food. The medicinal failure became a culinary success.
Early Commercial Ketchup Was Often Contaminated
As demand grew, manufacturers faced a serious problem: preservation. Preservation of tomato ketchups proved challenging since tomato-growing season was short, and some producers handled and stored the product so poorly that the resulting sauce contained contaminants like bacteria, spores, yeast, and mold, leading Pierre Blot to call commercial ketchup filthy, decomposed and putrid in 1866. Companies needed tomato ketchup year-round but only had fresh tomatoes for a couple months. Their solution? Use rotten tomatoes and add chemicals to mask the spoilage.
Companies were filling the medical tomato tincture with rotten tomato pulp, and began adding harmful chemicals like boric acid, formalin, salicylic acid, and benzoic acid to help preserve it. Some even added coal tar to make the brown sludge look red again. The ketchup industry was a disgusting mess of unsafe practices and contaminated products. Something had to change.
Henry Heinz Revolutionized Ketchup in 1876
In 1876, Henry Heinz created today’s version of tomato ketchup using ripe tomatoes, distilled vinegar, brown sugar, salt, and a variety of spices, and this recipe gained popularity as a non-medicinal condiment. Heinz’s breakthrough was using fully ripened tomatoes instead of green ones. Heinz chose very ripe red tomatoes which contained more pectin than fresh ones, and pectin is a natural preservative that freed ketchup from additional chemicals.
One of his key innovations was to increase the amount of sugar and vinegar in the recipe, which served both to improve the flavor and increase its shelf life. More sugar. More vinegar. That’s what made Heinz ketchup different. It wasn’t until the early 1900s, when Heinz removed preservatives from his ketchup line, that he became the largest tomato-ketchup producer in the world. While competitors added dangerous chemicals, Heinz went the opposite direction and created a pure product that actually tasted better.
Modern Ketchup Conquered the World
Heinz sells over 650 million bottles of this sauce in the world every year. It is estimated that 97% of U.S. households consume ketchup with the average American ingesting roughly three bottles of the sauce each year. That fermented fish sauce from ancient China has transformed into America’s most iconic condiment. After World War II in the mid-1940s, tomato ketchup spread around the globe from US bases, and this is how Japan’s Spaghetti Napolitan was first created, using ketchup as the tomato sauce base.
The worldwide dominance of tomato ketchup is remarkable when you think about how recently it took over. Just 150 years ago, mushroom ketchup was far more popular. Today, most people have never even heard of mushroom ketchup. The sweet tomato version won completely, erasing centuries of ketchup diversity in just a few generations.
So next time you grab that squeeze bottle, remember you’re holding the end result of a bizarre journey involving ancient fish sauce, medicinal fraud, contaminated condiments, and one entrepreneur’s gamble on ripe tomatoes and extra sugar. Ketchup wasn’t created for burgers at all. It was medicine that failed, food preservation that went wrong, and a flavor experiment that somehow succeeded beyond anyone’s wildest imagination. What other everyday items in your kitchen have equally strange origin stories?
