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19 Food Facts That May Change How You Eat

You won't believe some of the stuff you've been swallowing. Read these food facts from our experts before you take another bite.

Don’t believe everything you read

By now you’re probably familiar with antibiotics in your meat, pesticides on your produce, and the E. coli contaminating your lettuce. But even supposedly healthy foods can pack some surprises. We rounded up some food facts you won’t find on any nutrition label, and the results may forever change what, how, and where you eat. (Don’t miss the 11 common ways people read nutrition labels wrong.)

frozen raspberriesAlesikka/Shutterstock

Frozen fruit can be healthier than fresh

Fresh is best—most of the time. Research shows that frozen fruits are generally equal in nutrition to—and can even offer more benefits than—their fresh counterparts, says Amy Gorin, MS, RDN, owner of Amy Gorin Nutrition in New York City. One study published in the Journal of Agricultural and Food Chemistry found that freezing fruit helped retain nutrients such as vitamin E and minerals such as calcium and iron. Frozen fruit makes nutritious food available to us all year long. Before you start storing your fresh foods for winter, be sure you take a look at these food-storage guidelines you didn’t know.

Fresh salad with tomato, cucumber and greens mixed.Natallia Harahliad/Shutterstock

Some bottled dressings use the same ingredients as sunscreen

Titanium dioxide is a key ingredient in sunscreen and paint, and the one responsible for their white color. But it’s also found in many brands of store-bought salad dressings, as well as coffee creamers and icing, says Brigitte Zeitlin, RD, an owner of BZ Nutrition. Fortunately, if you want to avoid it, cutting your consumption isn’t difficult. If you’re not up for reading labels on the bottled stuff, DIY salad dressing can be as simple as splashing a little olive oil and lemon juice on your greens, and you can use regular milk or cream in your coffee. Titanium dioxide is considered safe to eat, but here are more details about the safety of eating titanium dioxide.

Wine corks background horizontalKarpenkov Denis/Shutterstock

Not all wine is vegan

File this under the category of inconvenient food facts: Who would ever guess that your vino might not be vegan-friendly? It’s true, says Ginger Hultin, RD, a spokesperson for the Academy of Nutrition and Dietetics and the nutritionist behind ChampagneNutrition. “In order to make wine clear, fining agents are used—commonly casein (a milk protein), albumin (egg white), gelatin (animal protein) and isinglass (fish bladder protein).” Although there is generally no residue from these products left in wine after processing, anyone who opposes using animal proteins in their food should seek out wine specifically labeled “vegan.” (Here’s what happens to your body when you go vegan.)

Japanese spice wasabikarins/Shutterstock

You’ve probably never had real wasabi

Anyone who’s ever had a California roll is familiar with that little green ball of sinus-clearing spiciness. But it’s probably not authentic wasabi, which comes from the roots of the wasabi plant and is naturally green in color, says Gorin. Most of what you’ll find in the United States is actually horseradish mixed with a few other ingredients, such as oil, water, and either natural or artificial coloring. Both horseradish and true wasabi come from the same Brassica family of plants that also includes broccoli and cabbage, but wasabi is difficult to grow outside of Japan, which is why you won’t often find it stateside. (There are a few growers in the Pacific Northwest and Canada.) Wasabi has a more complex flavor than horseradish, with some floral notes and some sweetness. For more food facts, make sure you follow these 50 healthy eating tips to help you live longer, feel better, and lose weight.

Pizza on black backgroundALXPHOTO/Shutterstock

Pizza hides the salt

The majority of salt in the American diet doesn’t come from a shaker. It comes from processed foods like soups and sauces and one other culprit that tends to fly under the radar: pizza. One slice can have upwards of 600 milligrams, says Hultin—that’s nearly half the sodium you need in a day. The American Heart Association suggests not exceeding 2,300 milligrams and, ideally, limiting yourself to 1,500 milligrams. So keep an eye on that pie.

Colorful donuts on stone table. Top viewEvgeny Karandaev/Shutterstock

A unhealthy diet may affect your brain

An Australian study published in 2015 in BMC Medicine found that people in their 60s who ate a lot of processed junk food had a smaller hippocampus—part of the brain crucial to learning and memory—than those who ate mostly fresh, whole foods. And in 2019, research published in the American Heart Association’s journal Stroke revealed a link between diet drinks and heart disease, stroke, and death from all causes. Specifically, women who drank two or more diet drinks a day had a 29 percent higher chance of heart disease, a 31 percent higher chance of stroke, and 16 percent increased risk of dying earlier than women who drank the stuff less than once a week. This builds on earlier research tying diet soda to Alzheimer’s disease: People who drank one or more artificially sweetened drinks per day were nearly three times more likely to develop dementia than those who drank less than one a week. Keep in mind that these types of studies can show an association between two factors but don’t prove that one caused the other. That said, here are 9 of the best brain foods you should be eating.

Top view of the almond milk in the glass bottle with almond nuts in the white bowl on the grey table.Edalin Photography/Shutterstock

Almond milk may not be as healthy as you think

“I’m always baffled by folks who want to avoid processed food yet drink almond milk,” says Angela Lemond, RDN, CSP, LD, a nutritionist in Plano, Texas, and spokesperson for the Academy of Nutrition and Dietetics. “Commercial almond milk is four to five almonds, water, added vitamins, and additives to make it look like milk. It’s very man-made.” She recommends that people snack on whole almonds and drink regular cow’s milk to maximize their nutrients in the most natural way possible. (If you normally consume dairy, that is.) Check out the 50 healthiest foods you can buy at the grocery store.

Close up of assorted multicolored jelly beans Paul Krugman/Shutterstock

Your nails and jelly beans have something in common

You know that shiny, long-lasting shellac manicure you’re obsessed with? That same substance is used to give jelly beans, candy corn, and other glazed candy their shine, says Zeitlin. And that’s not even all. Shellac is actually a secretion from an insect. If you want to satisfy your sweet tooth without this additive, join team dark chocolate—it has antioxidants and comes from the cacao plant, not a bug.

tomatoesDjordje Novakov/Shutterstock

Processed food isn’t all bad

People have a knee-jerk reaction to the term “processed foods,” but they’re not all bad. It just depends on the level and kind of processing, says Gorin. Take 100 percent grape juice, for example. Because it is made by pressing whole Concord grapes (including the skin, seeds, and pulp), it makes the heart-healthy and immune-boosting nutrients in those fruits—which are fairly short-lived in terms of their growing season—more accessible, she explains. Similarly, cooking tomatoes actually increases the bioavailability of lycopene, the cancer-fighting compound in them, making some packaged products a great option. There’s even research suggesting that steaming broccoli can lift levels of health-promoting antioxidant compounds. Just like “processed foods” doesn’t equate bad, these 13 “healthy” food habits are myths that you should actually avoid.

ice cream background with strawberry, vanilla and chocolatepixelliebe/Shutterstock

You should watch out for unnatural “natural flavors”

Manufacturers can use the blanket term “natural flavorings” on food labels. This could include castoreum, aka secretions from the anal gland of beavers, says Zeitlin. Yup, that’s natural. Castoreum, which is still sometimes found in small amounts in some products containing alcohol, has been used in chewing gum, ice cream (usually vanilla and strawberry), puddings, brownie mixes, and some hard candy. It’s earned the FDA’s “generally recognized as safe” (or GRAS) status, but vegans and people with a high ick factor may want to beware or stick to sweets with other ingredients.

white coffee cup on backgroundDima Sobko/Shutterstock

Coffee is the top source of antioxidants in the American diet

Coffee may be the number one source of antioxidants in the American diet, as this study on coffee published in the journal Molecules points out. Antioxidants, as you may have heard while learning about other food facts, help fight off aging, heart disease, and cancer. But before you go for that second cup, remember this: Coffee isn’t a super-rich source of the free-radical-slaying substance; it just comes out on top because so many people drink so much of it. Load up on leafy greens, berries, and nuts to get your fill.

Glasses of beer and snacks on the wooden table. Top view.Valentyn Volkov/Shutterstock

Beer may help prevent tooth decay

Some food facts just make you smile: Yes, tossing back a brew or two—specifically Guinness—may help fight unhealthy bacteria in your mouth, according to a 2012 study published in the Journal of Biomedicine and Biotechnology. In laboratory-grown cells and assays, researchers discovered that beer helped prevent the growth of bacteria that leads to tooth decay and gum disease. Previous research found that the silicon in beer may promote strong bones, so it looks like milk’s got some competition—no, not really. And you still need to brush your teeth, by the way.

chips compared to jellyfishShutterstock (2)

Someone made jellyfish snacks

And you thought cricket protein bars were bad. In 2017, researchers at the University of Southern Denmark developed a method for drying the tentacled sea creatures out to a crispy, paper-thin consistency, not unlike a chip. No word on how soon they’ll show up in your local convenience store or in what flavors, but you can always hope. In the meantime, you can make your own delicious chips with these healthy homemade alternatives to chips.

OystersValentyn Volkov/Shutterstock

Raw oysters are still alive when you eat them

This may be one of the grossest food facts that is sadly true. The slimy little creatures are totally alive as they slide down your throat because dead oysters are not safe to eat. Once an oyster is plucked from the deep blue sea, their life span is extremely short, which means that restaurants need to get them on your plate ASAP. Live oysters are the only safe ones to eat because dead oysters harbor large amounts of bacteria that will make you sick, according to Safe Oysters

Woman using a microwaveRostislav_Sedlacek/Shutterstock

Leftovers may taste better the next day

As if you needed another reason to save leftovers, the Institute of Food Technologists found that chemical reactions within food may continue to take place well after you cook and store it away. This means that your food may taste even better the second time around. Food proteins may continue to break down and release amino acids like glutamate, which gives food its savory taste. You may also notice that your leftovers start to brown in the microwave. The browning effect happens when the amino acids react with sugar to produce new flavor molecules. While you’re picking up new food facts, make sure you’re not falling for these 21 common food myths.

Sea salt on a black wooden backgroundStudio KIWI/Shutterstock

Sea salt and table salt contain about the same amount of sodium

Sea salt is often thought to be the healthier, low-sodium alternative to table salt. You may think you’re eating smarter by sprinkling sea salt on your roasted vegetables instead of table salt. But the truth is that table salt and most sea salts contain about 40 percent sodium by weight, according to the American Heart Association. In other words, no real health difference—sorry, sea salt advocates.

Pruszcz Gdanski, Poland - April 7, 2018: Close-up for Tabasco logo on bottle. Tabasco sauce is hot sauce made from tabasco peppers, vinegar and salt.Robson90/Shutterstock

Spicy foods may help you live longer

People who eat spicy food almost every day tend to live longer than people who only eat spicy foods once a week, according to a study published in the British journal BMJ. The researchers looked at the health and diets of nearly 500,000 people in China for four years and followed up a few years later. Keep in mind that the study can’t prove that eating spicy foods gives you a few extra years of life, it just shows that people who ate spicy foods during the study period were less likely to die than those who ate spicy foods less frequently, for reasons that aren’t yet clear. The study was conducted by researchers at the Harvard School of Public Health, and the Harvard Health Letter points out that other investigators have found that ingredients in spicy foods such as capsaicin may help lower unhealthy fats in the blood (LDL cholesterol and triglycerides) and ease inflammation. (Check out these 33 healthy foods that are way more nutritious than you realized.)

Beautiful texture slices of pineappleJIANG HONGYAN/Shutterstock

Pineapple may ruin your taste buds

Before you start to freak out, the effect usually lasts only for a few hours or the remainder of the day. Plus, some people experience a burning, prickly sensation eating a pineapple, while others do not. The culprit behind that prickly feeling on your tongue is bromelain, an enzyme that breaks down proteins. Cooking pineapple or cutting it up and letting it sit overnight will lessen the attack of bromelain because the enzyme does break down with time or heat. Make sure you also avoid eating the core—that’s where most of the bromelain hides. 

Close up Great Burger beefon a wooden tableAndrey Arkusha/Shutterstock

It takes 460 gallons of water to make a hamburger

It takes 1,840 gallons of water to produce one pound of beef, according to the U.S. Geological Survey. That number includes irrigation for the grains and grasses that the cattle feed on, plus water for drinking and processing. A good step toward being more environmentally friendly may be swapping out that juicy hamburger for a veggie alternative: The Impossible Burger uses 87 percent less water by comparison. (Next—watch out for these “healthy” food myths people still believe.)

Sources
Medically reviewed by Elisabetta Politi, CDE, MPH, RD, on April 20, 2020