Coffee is one of the most consumed beverages in the world, and with its popularity comes a lot of misinformation. From health claims to brewing techniques, myths about coffee have been around for decades — some harmless, others potentially misleading.
In this article, we’ll bust some of the most common coffee myths, separating fact from fiction so you can sip smarter.
Myth #1: Coffee Dehydrates You
Fiction!
Many people believe coffee is dehydrating because it contains caffeine, a known diuretic. While it’s true that caffeine can increase urination, the water in coffee more than makes up for it.
The Truth:
Coffee contributes to your daily fluid intake. Unless you’re drinking it in extreme quantities, it’s unlikely to dehydrate you.
Myth #2: Espresso Has More Caffeine Than Regular Coffee
Not necessarily.
Espresso has more caffeine per ounce, but it’s typically served in small quantities. A shot of espresso (about 1 oz) contains roughly 63 mg of caffeine, while a standard 8 oz cup of drip coffee contains about 95 mg.
The Truth:
If you’re drinking one regular coffee versus one espresso shot, the regular coffee usually has more caffeine overall.
Myth #3: Coffee Stunts Your Growth
Fiction!
This myth has been circulating for decades, but there’s no scientific evidence to support it.
The Truth:
Coffee does not affect bone development or growth. The idea may have originated from concerns about caffeine interfering with calcium absorption, but studies have shown the effect is minimal and easily offset by a calcium-rich diet.
Myth #4: Dark Roast Has More Caffeine Than Light Roast
Actually, it’s the opposite.
Many assume that the bolder, stronger flavor of dark roast means more caffeine. But roasting burns off some of the caffeine content.
The Truth:
Light roasts tend to have slightly more caffeine than dark roasts by volume. However, the difference is small and depends on how coffee is measured (by weight or scoop).
Myth #5: Coffee Causes Insomnia
Only if consumed too late.
Caffeine is a stimulant and can disrupt sleep if consumed too close to bedtime. However, for most people, moderate coffee intake in the morning or early afternoon has no impact on sleep.
The Truth:
It takes about 4–6 hours for half of the caffeine in your system to wear off. So, drinking coffee in the evening may cause issues, but enjoying a cup in the morning is unlikely to interfere with your sleep.
Myth #6: Adding Milk Kills the Antioxidants
Not entirely true.
Coffee is rich in antioxidants, and some believe that adding milk reduces their benefits. While milk proteins can bind to some antioxidants, the overall impact is minimal.
The Truth:
You still get most of coffee’s antioxidant benefits, even with milk or cream.
Myth #7: Coffee Is Addictive Like Drugs
False.
While coffee can lead to dependence due to caffeine, it’s not addictive in the same way as drugs like nicotine or opioids.
The Truth:
Caffeine withdrawal may cause headaches or fatigue, but it’s temporary and not dangerous. Most people can reduce or quit caffeine without serious symptoms.
Myth #8: Coffee Is Bad for Your Heart
Old myth.
Past studies suggested a link between coffee and heart issues, but more recent research shows that moderate coffee consumption (3–4 cups per day) can actually be heart-protective.
The Truth:
Coffee contains polyphenols and other compounds that may reduce inflammation and benefit cardiovascular health. Just avoid overdoing it.
Myth #9: You Should Always Use Boiling Water
Wrong.
Pouring boiling water (100°C or 212°F) over coffee grounds can over-extract them, resulting in a bitter cup.
The Truth:
The ideal brewing temperature is between 195°F and 205°F (90°C–96°C). Let your water cool for 30 seconds after boiling before brewing.
Myth #10: Coffee Helps You Sober Up
Completely false.
Many people believe a cup of coffee can help you “sober up” after drinking alcohol. While caffeine may make you feel more alert, it does not speed up the breakdown of alcohol in your body.
The Truth:
Coffee might help you feel awake, but your body still needs time to metabolize alcohol. It does not make you sober.
Extra Myth: Freezing Coffee Beans Keeps Them Fresh
Partially true.
Freezing can help preserve coffee beans, but only if done properly. Beans should be stored in an airtight container to avoid moisture and odor absorption.
The Truth:
Freezing is okay for long-term storage, but for daily use, keep beans in a cool, dark, dry place instead.
Final Thoughts: Keep Coffee Fun and Factual
Coffee culture is full of myths, but knowing the truth can help you enjoy your coffee with confidence. Whether you’re worried about caffeine or curious about roast levels, the science tells a more reassuring story: for most people, coffee is safe, healthy, and delicious in moderation.
So the next time someone warns you about stunted growth or dehydration from your morning cup, you can smile — and sip anyway.
