Here are 10 foods totally worth a second look because, just like medicines, they can produce side effects—some barely noticeable, others downright astonishing. While we often associate adverse reactions with pills, the edible world hides its own roster of shocking surprises.
10 foods totally: A Quick Overview
10 The Scottish Health Pea Suppresses Hunger But Provides Energy
The Scottish health pea, known in scholarly circles as bitter vetch, was once a staple crop in medieval Scotland. Its tuberous roots reportedly taste like a cross between leather and licorice, and historically they were prized as an appetite‑suppressing agent before potatoes dominated the table. Anyone who consumes the pea often reports a sudden loss of desire to eat or drink.
Beyond simple hunger control, folklore suggests the plant offers more. Ancient Highland warriors are said to have chewed the pea to perform feats of extraordinary strength, while Roman soldiers allegedly relied on it for sustained stamina during protracted battles. These tales hint at a dual‑purpose herb: both a diet aid and a performance enhancer.
Modern researchers have taken note of its potential as a weight‑loss tool, recognizing that a natural substance capable of silencing the stomach’s rumblings could be a lucrative commodity. If a single plant can both boost energy and mute hunger, the commercial appeal is undeniable.
However, cultivation presents a formidable obstacle. The pea is notoriously difficult to grow and harvest on a large scale, which limits its availability. Still, the promise of a crop that fuels the body while erasing cravings keeps scientists and farmers intrigued.
9 Miracle Berries Block the Taste of Sour
For a brief window of culinary novelty, miracle berries—also called Synsepalum dulcificum—captured the internet’s imagination. Originating from West Africa, this tiny fruit possesses a remarkable ability to reshape the way we perceive other foods on our tongues.
The magic lies in a glycoprotein called miraculin, which latches onto taste receptors and, when exposed to acidic (sour) foods, tricks the brain into registering sweetness. The effect can last from one to two hours, turning lemons into candy and vinegar into dessert.
Early attempts to market miracle fruit as a sugar substitute for diabetics and low‑calorie diets fizzled out after regulatory hurdles and inconsistent results. Nevertheless, the fruit remains a curiosity for chefs and food‑enthusiasts seeking a sour‑to‑sweet transformation.
8 Salema Porgy Is a Hallucinogenic Fish
Out of roughly 32,000 fish species, only a handful are regularly featured on dinner plates. While most are valued for their mild flavor and easy preparation, a few possess unsettling side effects that keep them off mainstream menus.
One such outlier is the Salema porgy, dubbed “the fish that makes dreams” in Arabic. Found in the eastern waters of Europe and Africa, this modest‑looking fish can induce vivid hallucinations in some diners, lasting up to three days.
Reports describe unsettling visions: one eater heard phantom screams of humans and birds, while another saw towering arthropods that resembled giant centipedes. The phenomenon, known as ichthyoallyeinotoxism, remains poorly understood, and scientists are still probing why only certain parts of the fish trigger the effect.
7 Ice Cream Can Cause Breathalyzer False Positives
Breathalyzer devices measure alcohol content in a driver’s breath to determine legal fitness. While many foods contain trace alcohol, most do not set off these machines. Yet a niche industry of lawyers has tried to convince the public that ordinary items like bread can cause false positives, despite scant scientific backing.
One documented case involved a man who claimed a serving of Bubble O’Bill ice cream caused his vehicle’s breathalyzer to refuse ignition. Initial police testing showed a 0.00 reading, but after consuming the ice cream, a subsequent test registered 0.18, prompting a judge to order the device’s removal from the car.
6 Persimmons Can Form a Tannin Brick in Your Gut
Persimmons, bright orange‑yellow fruits reminiscent of a sweet tomato, become markedly bitter when unripe due to high tannin content. While tannins are common in tea, wine, and spices—serving primarily to make plants taste unpleasant—they can pose a health hazard when consumed in excess.
When large quantities of unripe persimmons are eaten, the tannins bind with gastric juices, cellulose, and other compounds to form a phytobezoar—a solid mass likened to a brick of bark lodged in the stomach. This indigestible mass can cause painful blockages, sometimes necessitating surgical removal.
Interestingly, physicians have reported that drinking Coca‑Cola can dissolve these tannin bricks, offering a non‑surgical remedy before resorting to invasive procedures.
5 Beef Jerky Seems to Cause Mania
Fans of beef jerky may want to think twice, as the salty, chewy snack appears linked to psychiatric disturbances. The culprit isn’t the meat itself but the nitrates used in curing, which are also present in other processed meats like salami and Slim Jims.
In a study of over 1,000 hospitalized patients, those admitted for mental health issues were 3.5 times more likely to have consumed jerky or similar cured meats compared to a control group. Animal experiments echo these findings: rats fed a nitrate‑rich diet for weeks displayed manic‑like behaviors.
4 Margarine Can Make You Aggressive
The story of margarine dates back to Napoleon’s quest for a cheap butter substitute, initially crafted from beef tallow and milk. Modern margarine, derived from various vegetable oils, is inexpensive and shelf‑stable, but it carries a hidden mood‑altering side effect.
Research points to dietary trans fatty acids—common in many margarines—as a trigger for aggression. A UK study of prisoners found that supplementing diets with vitamins, minerals, and especially omega‑3 fatty acids reduced violent offenses by 37%. The decline was linked to a shift away from omega‑6‑rich trans fats toward healthier omega‑3s.
Although artificial trans fats have been banned in the United States, naturally occurring trans fats remain legal, and their reputation as “bad fats” focuses on cardiovascular risks rather than their potential to stir aggression.
3 Looking at Red Meat Calms Men Down
The stereotype that men are obsessed with steak and burgers hides a curious scientific twist: merely seeing red meat can have a calming effect on men. In a bizarre experiment, participants viewed a series of images while listening to an actor recite lines; they could administer loud noises as punishment when the actor slipped up.
Results revealed that men exposed to photographs of red meat were less inclined to deliver harsh punishments, contradicting expectations that images of blood and flesh would incite aggression. The study suggests a counterintuitive soothing response triggered by visual cues of meat.
2 A Toxin in Some Shellfish Can Cause Amnesia
Shellfish are a culinary delight for many, yet they can harbor a dangerous toxin that leads to amnesic shellfish poisoning. The culprit is domoic acid, a compound produced by diatoms—tiny algae that survive cooking and can accumulate in bivalves such as clams and mussels.
A 1987 outbreak identified three fatalities and over 100 cases of infection. Victims suffered memory loss, vomiting, diarrhea, disorientation, dizziness, and muscle weakness. Some survivors experienced long‑term cognitive deficits.
Because the toxin resists heat, standard steaming does not guarantee safety, underscoring the need for careful monitoring of shellfish harvests.
1 Ciguatera Toxicity From Fish Reverse Hot and Cold Sensation In Your Mind
Ciguatera toxicity, contracted from reef fish such as grouper, eel, or red snapper, is one of the most bizarre food‑borne illnesses. The fish become contaminated with microorganisms that produce ciguatoxin, a potent neurotoxin.
Beyond the usual cramps and diarrhea, sufferers experience a striking reversal of temperature perception: cold items feel scorching hot, while hot foods feel icy. Imagine ice cream burning your mouth and coffee feeling refreshingly cool.
Additional symptoms include a burning itch across the body and a terrifying sensation that one’s teeth are falling out—though the teeth remain firmly in place. The condition can be both confusing and dangerous, as the altered temperature sense may lead to accidental burns.