18 health myths you may have adopted
Nope, eggs are not bad for you, and coffee does not stunt your growth.
Organic products aren’t necessarily healthier for you, and GMOs aren’t harmful.
Cracking your knuckles causes arthritis. Eating eggs gives you heart disease. Coffee stunts your growth. No, no, and no again — for decades, health myths like these have influenced consumer decisions, originating from obscure studies or the opinion of a then-influential doctor.
Science has debunked much of this conventional wisdom that percolates as fact — here are 18 of the most persistent health myths that everyone needs to stop believing right now.
Myth: Exercising at night ruins your sleep
Feel free to work out at night if that’s your jam.
The truth: Not for everyone.
The advice of late-1900s exercise professionals would have you believe that exercising too late keeps you up at night. It’s just not true for everyone.
Researchers have found that nighttime exercise may have no impact whatsoever on your sleep quality, and for some people, exercising before bed can even result in better ZZZs.
Myth: Eating eggs causes high cholesterol
Go ahead and eat your omelet.
The truth: Eggs have almost no effect on your blood cholesterol.
Among millions of others influenced by the 1968 recommendation that adults should eat no more than three whole eggs per week, you may have needlessly avoided eggs for the last 50 years.
Scientists have since debunked the idea that eggs increase blood cholesterol and heighten your risk for heart disease. Harvard University’s analysis of two 2018 studies suggests that eating eggs can improve your heart health.
Myth: You must drink 64 ounces of water each day
The truth: Everyone has different hydration needs.
Everyone knows the eight-by-eight rule: Drink eight 8-ounce glasses of water daily. This water intake recommendation stems from a very outdated — in this case, centuries-old — ideal.
While based on accurate observations (water keeps you healthy), the notion that everyone needs exactly 64 ounces or two liters of water daily is wrong. Everyone has different hydration needs and should adjust their water intake accordingly based on their activity level and signs of dehydration.
Myth: 10,000 steps is the key to getting healthy
The truth: It’s subjective.
Walking is fantastic exercise; it really is. But walking 10,000 steps a day is not enough to get healthy for most people. Exercise isn’t one-size-fits-all, so blanketing the general public with a step recommendation doesn’t make sense.
If you don’t even get close to 10,000 steps per day (my average is about 4,000), but all my vital signs are healthy, and I’m free of disease — perhaps because I generally eat a healthy diet and meet the recommendations in the Physical Activity Guidelines for Americans.
Myth: Six-pack abs are the epitome of health
Work your core, but focus on strength over aesthetics.
The truth: Six-packs are a scam.
Having six-pack abs does not make you the fittest person on earth, although it’s valid to feel that way if you have them. Forging twelve little divets into your stomach certainly requires hard work in the gym and mindfulness about your diet, but abs are more of a genetic quality than anything else.
You could eat McDonald’s once a day and maintain a toned stomach as long as I keep up with my workout schedule — and I recognize that it’s not that easy for everyone.
Six-pack abs aren’t something you should strive for, anyway, if your body type doesn’t support the goal: For some people, a six-pack means their diet is too restrictive, or they’re not taking in enough calories overall. Aiming for a strong core over a visible core is a better goal.
Myth: Eating saturated fat directly causes heart disease
The truth: There are more factors to consider.
Medical literature still contains much controversy about saturated fat and its relationship to cardiovascular diseases.
For decades, public health agencies warned consumers about the dangers of saturated fat, and things really got turned upside-down when a groundbreaking 2017 study boldly proclaimed that saturated fat does not, in fact, clog the arteries.
The study also stated that the risk of “bad” (LDL) cholesterol had been overstated.
Since then, the scientific consensus has dissipated, and research about dietary fat and heart health is ongoing. The FDA still recommends limiting (but not completely avoiding) saturated fat intake in the updated Dietary Guidelines for Americans. To be safe, it’s a good idea to follow their advice.
Myth: Organic foods are better for you
The truth: Evidence is extremely limited.
To date, insufficient valid scientific evidence supports organic produce as superior to conventionally farmed produce. Studies have concluded that “there is some evidence for potential benefits of organic food consumption,” but “considerable uncertainty/controversy remains on whether or to what extent these composition differences affect human health.”
Organic produce is subject to different farming practices and tighter regulations than conventional produce (like no synthetic pesticides), but so far, that doesn’t mean it’s actually more nutritious.
Many consumers also believe organic food to be healthier because it isn’t produced with synthetic pesticides. Still, research isn’t detailed on that, either: One study concluded that “Organic foods convey lower pesticide residue exposure than conventionally produced foods, but the impact of this on human health is unclear.”
Another study stated that analyses of human specimens (such as urine) after eating conventional and organic produce showed that there is a possibility that organic foods lower the risk of pesticide exposure, although the clinical implications are unclear.
Myth: Natural sugars are better for you than refined sugar
All sugar, just in different colors and forms.
The truth: Sugar is sugar.
Coconut sugar, agave nectar, “raw” sugar, palm sugar, evaporated cane juice — these are all sugar. They just sound healthier because they have fancy names.
And hate to break it to you, but molasses and honey are just as bad as sucrose, or table sugar when added to foods (and they still count toward your daily added sugar intake).
Like those above, your body processes all simple sugars the same way. There is one differentiation worth making, though: Sugar in fruit comes along with fiber, vitamins, antioxidants, and minerals, which makes it more nutritious than sugar-laden snacks or candy.
Myth: Coffee stunts your growth
The truth: Genetics determine your height.
For reasons unknown, this is a wildly common belief. According to Harvard University, “There is no scientifically valid evidence to suggest that coffee can stunt a person’s growth.” As for any other health risks you believe about coffee, those aren’t true either:
Coffee isn’t linked to any medical conditions except for a slight, temporary increase in blood pressure.
Myth: GMOs cause cancer
GMOs aren’t as scary as you might think.
The truth: No, they don’t.
Genetically modified crops are just not as scary as they’re made out to be — plain and simple. The wellness world might have you believe otherwise, but there is no scientific evidence that GMOs cause cancer (or other health problems).
A meta-analysis of long-term studies on GMOs concluded that “GM plants are nutritionally equivalent to their non-GM counterparts and can be safely used in food [for people] and feed [for animals].”
They can also help farmers decrease pesticide use, increase crop yields, and increase food security in developing countries. Science is good.
Myth: Microwave ovens cause cancer
The truth: Nope.
Microwaves heat your food: nothing more, nothing less. They do emit electromagnetic radiation, a form of non-ionizing radiation similar to the radiofrequency waves that come from your cell phone (which also won’t give you cancer, by the way).
Still, non-ionizing radiation isn’t known to cause cancer in humans because it isn’t strong enough to alter the structure of cells.
Plus, the radiation in microwave ovens is contained within the appliance’s walls, as long as yours is working properly. But even if yours leaks, the Food and Drug Administration imposes a maximum leak requirement on microwave oven manufacturers far lower than what would harm people.
Myth: Antiperspirants cause breast cancer
Putting on deodorant is something we all do every day.
The truth: No, again.
Are we noticing the cancer thing yet? Apparently, everything causes cancer. This myth started coming about in the early 2000s when studies like this one reported that applying deodorant to cells in a petri dish caused individual cell damage, and aluminum got called out as a potential culprit.
But humans apply deodorant to the very outer layer of skin, not to individual exposed kidney cells.
A review of studies later determined that aluminum in various forms is not known to cause human cancer. The American Cancer Society has also stated on antiperspirants and breast cancer: “There are no strong epidemiologic studies in the medical literature that link breast cancer risk and antiperspirant use, and very little scientific evidence to support this claim.”
Also, the International Agency for Research on Cancer has a handy list of carcinogens classified by level of evidence that a substance can cause cancer, and aluminum is not on the list. Aluminum production is listed, but don’t confuse metal production with what is in your deodorant.
Myth: Breakfast is the most important meal of the day
Eat breakfast, or don’t — whichever you prefer.
The truth: It’s OK to skip breakfast.
The world will not end if you skip breakfast. Actually, the science behind intermittent fasting actually suggests that skipping breakfast could benefit you more than eating it. If skipping breakfast suits your lifestyle and health needs, go for it: Soothe your hunger before it becomes a hanger.
Myth: Cold weather causes colds
The truth: Weather alone cannot make you sick.
Ah, a classic case of correlation without causation. Yes, more people get sick when temperatures drop, but cold weather doesn’t make you sick.
Possible explanations include: People spend more time indoors when it’s cold out, and viruses spread more easily in close quarters; viruses spread more easily through dry air, and cold weather temporarily impairs your immune system.
Myth: Everyone needs eight hours of sleep
The truth: Everyone is different.
Eight is the magic number: Get eight hours of sleep, and you’ll wake up feeling like a magical forest fairy with boundless energy. For me, this is a big fat myth.
The point is: Everyone has a unique circadian rhythm that determines how much sleep is optimal for them. While seven to nine hours is still the standard recommendation for adults, you should treat sleep like hydration and exercise: Get enough to feel your best and keep your body healthy, but not so much that it starts affecting you negatively. You can always have too much of a good thing, even sleep.
Myth: The sun is safer than tanning beds (or vice versa)
The truth: They both emit UV rays that cause skin cancer.
Tanning in the sun and a tanning bed does the same thing: expose your skin to ultraviolet rays that cause premature aging and are known to cause skin cancer.
There are arguments both ways: the sun and tanning beds are safer, but the American Academy of Dermatology knocks both sides down. Neither is good for your skin.
Myth: Cracking your knuckles causes arthritis
The truth: It’s just the release of gases.
Your joints may creak, crack and pop, but those noises typically have nothing to do with your risk of arthritis — usually, it’s just the harmless release of gases from synovial fluid, the fluid that lubricates your joints.
If you have pain while cracking any joints (or joint pain in general), it’s worth getting checked out by a doctor because you could have arthritis or another condition, such as tendonitis.
Myth: Your body needs juice cleanses
The truth: Your body cleanses itself.
Despite the fact that the popularity of juice cleanses to detoxify your body, your liver, kidneys, and skin will get the job done on their own.
Your body also eliminates waste and impurities through your digestive tract (poop, hello), lungs, and lymphatic system. In other words, your body is basically one big filter for icky stuff.
You can support your body’s natural detoxing efforts by eating a healthy diet with minimally processed foods, exercising, sweating, and drinking enough water. Juice cleanses, or water fasts can do more harm than good, though: You deprive your body of essential micro and macronutrients.