Energy drinks haven’t been shown to stunt growth. No study has followed energy drink intake through adolescence and found shorter adult height as a result. The concern that does hold up is different: high caffeine and sugar intake in kids and teens can wreck sleep, crowd out better drinks, and strain the heart.
The belief that caffeine makes kids shorter is old and stubborn, and it deserves a closer look. Direct effects on height are one thing, and habits that support or undermine healthy development are another. Energy drinks also aren’t the same as a cup of tea. Most combine a large caffeine dose with sugar and other stimulants, which is why pediatric groups treat them differently. For a broader view of what actually interferes with height, the guide on what can stunt your growth covers the factors with real evidence behind them.
Key Takeaways
- Current evidence does not establish that energy drinks directly stunt height.
- Caffeine hasn’t been proven to make children or teens permanently shorter.
- Sleep loss is the most realistic way energy drinks could interfere with development.
- High caffeine intake can cause nervousness, insomnia, a racing heart, and headaches.
- Genetics, nutrition, hormones, sleep, and overall health shape height far more than any beverage.
- The American Academy of Pediatrics (AAP) advises against energy drinks for children and adolescents.
Do Energy Drinks Stunt Your Growth?
There’s not enough evidence to say energy drinks reduce final adult height. Nobody has shown it, and nothing about the biology makes it likely.
To prove that claim, researchers would need longitudinal studies that follow kids for years, measure growth velocity at regular intervals, record energy drink intake accurately, and account for everything else that affects height. Genetics alone explains most of the variation between people, so a real effect from a drink would be hard to isolate. What exists instead is short-term data on caffeine’s effects on the heart, nervous system, and sleep. Those effects are real, but they aren’t the same thing as permanent growth restriction.
Three ideas get blended together in most online claims. Correlation means two things show up together, biological plausibility means a mechanism could exist, and causation means one thing demonstrably produces the other. For energy drinks and height, the evidence doesn’t reach even the second level in any convincing way.
Where Did the Caffeine-Stunts-Growth Myth Come From?
The myth traces mostly to older worries about coffee, calcium, and bone health. Studies in the 1980s and 1990s found that caffeine slightly increases calcium loss in urine, and that led to headlines linking coffee to weak bones. Height got folded into the story because bones and height feel like the same subject.
They aren’t quite the same. The calcium effect is small. The National Institutes of Health notes that the amount lost is modest enough to be offset by a splash of milk in your coffee. Later work found no clear link between caffeine and reduced height in kids who get enough calcium. The claim survives because it sounds logical and because coffee is easy to blame. The article on whether coffee stunts your growth goes through that history in more detail.
How Energy Drinks Could Indirectly Affect Healthy Growth
The realistic risk runs through habits, not through a direct hit on height. The chain looks like this: an energy drink delivers caffeine and sugar, caffeine pushes bedtime later or shortens sleep, and appetite and food choices shift. Over months, that adds up to conditions that support development less well.
Notice the wording. One can doesn’t shorten anyone. But a teen who drinks two a day, skips breakfast because the drink blunts appetite, and sleeps six hours on school nights is stacking several small disadvantages.
Dietary displacement matters too. A 16-ounce energy drink can carry a large share of a day’s added sugar, and liquid calories from a can tend to replace milk, water, or a real meal. Growing bodies need protein, calcium, and other nutrients in steady supply, and a can of sugar and stimulants delivers none of them.
Caffeine, Sleep, and Growth
Sleep is where caffeine connects most directly to growth. A large share of growth hormone is released during deep sleep, and children and teens need roughly 8 to 10 hours a night to support development. Caffeine works by blocking adenosine, the chemical that builds sleep pressure through the day.
Its half-life in adults runs around five hours, which means a can finished at 4 p.m. still leaves about half its caffeine in the body near 9 p.m. Teens also run on a naturally delayed body clock during puberty, so pushing bedtime later by even an hour can cut total sleep on early school mornings. Chronic sleep debt is a far more credible threat to healthy development than any single ingredient. The full mechanism is laid out in the article on sleep and height growth.
Does Caffeine Stunt Your Growth?
Caffeine alone hasn’t been shown to make anyone permanently shorter. It’s a stimulant that raises heart rate and alertness, and the effects last hours, not years.
Kids and teens do respond differently than adults, mostly because of body weight. The same 200 mg dose is a larger dose per pound in a 100-pound teen than in a 180-pound adult. Tolerance builds with regular use, so a teen who starts with one can often drifts toward two. The AAP has historically suggested that adolescents keep caffeine under about 100 mg a day, roughly one small cup of coffee, and advises against it entirely for younger children. Check the AAP’s current statement, since guidance gets updated.
What About Caffeine and Bone Health?
Bone health and height are related but distinct. Height comes from bones lengthening at the growth plates, while bone density describes how mineral-packed those bones are. A study showing lower bone density doesn’t show shorter adults.
For bone building, calcium and vitamin D matter most, and teens are exactly the group that tends to fall short on both. If a teen drinks soda or energy drinks in place of milk, the lost calcium intake does more damage than caffeine’s small urinary effect. Dairy, fortified plant milks, and leafy greens cover most of the gap.
What’s Actually in an Energy Drink?
Energy drink formulas vary widely, so the label is the only reliable guide. Most contain caffeine, added sugar or sweeteners, B vitamins, and blends built around taurine, guarana, or ginseng. Guarana is itself a caffeine source, which means the printed caffeine total may not capture everything.
Serving size is the other trap. A can labeled as two servings often gets drunk in one sitting, doubling every number on the Nutrition Facts panel. Look at the added sugars line and the caffeine content, and check whether the panel refers to the whole can or half of it.
Popular US Energy Drinks Can Contain Very Different Amounts of Caffeine
The table below shows approximate figures for common single-can sizes. Formulations and sizes change, so confirm against the current label before relying on any number.
| Drink | Typical size | Approx. caffeine | Added sugar | Notes |
|---|---|---|---|---|
| Red Bull | 8.4 fl oz | about 80 mg | about 27 g | Smallest can and lowest dose here, though the sugar is still substantial for its size |
| Monster Energy | 16 fl oz | about 160 mg | about 54 g | Sugar content is the standout, and the big can invites finishing it in one go |
| Celsius | 12 fl oz | about 200 mg | none (sweetened artificially) | Marketed as a fitness drink, but the caffeine tops the others in this table |
| Gatorade (for comparison) | 12 fl oz | 0 mg | about 21 g | A sports drink with no stimulants, though the sugar still adds up |
The differences say a lot. Red Bull looks mild next to the others, but its small can is what keeps the dose down, not a gentler formula. Celsius sidesteps the sugar concern and lands at the highest caffeine load, which makes the “healthier” image misleading for a 14-year-old. Monster’s size and sugar combination makes it the easiest to overdo. Sugar-free doesn’t mean stimulant-free, and that’s a distinction worth checking on every label.
Are Energy Drinks Safe for Kids and Teenagers?
The AAP says children and adolescents shouldn’t consume energy drinks. That position rests on caffeine’s effects on the nervous system and heart, plus the sugar load, not on height.
The effects reported most often include trouble sleeping, jitteriness, anxiety, headaches, stomach upset, and a faster heart rate. Blood pressure can rise too. Emergency visits linked to energy drinks have been documented in teens, usually involving large amounts or combinations with other stimulants. Kids with heart conditions or ADHD medication prescriptions face added risk and are better off talking to a pediatrician before any caffeine at all.
Energy Drinks vs. Sports Drinks
Sports drinks and energy drinks solve different problems. Sports drinks supply fluid, sodium, and carbohydrates to replace what’s lost in prolonged, sweaty exercise. Energy drinks supply stimulants.
For most kids playing a school practice, water covers hydration fine. A sports drink starts to make sense during hard exercise lasting over an hour, especially in heat. Neither category needs to replace water for everyday drinking, and swapping an energy drink for a sports drink only helps if the goal is dropping the caffeine.
What Really Determines How Tall You Grow?
Genetics sets most of the range, and nutrition, hormones, health, and sleep decide where within that range a person lands. Studies of twins and families consistently put the genetic share of height at roughly 80 percent in well-nourished populations.
The rest comes from growth hormone and thyroid function, puberty timing, chronic illness, and whether the body got enough fuel during the growing years. None of these are dramatic or secret. Untreated conditions like celiac disease or hormone deficiencies can slow growth noticeably, which is why a child who drops off their growth curve deserves a pediatric visit, not a beverage audit. No food, supplement, or habit is proven to push someone past their genetic ceiling.
Nutrition and Healthy Development
Steady, adequate nutrition supports normal growth, and it doesn’t need to be fancy. Growing kids need enough total calories, protein from sources like eggs, beans, fish, poultry, and dairy, plus calcium, vitamin D, and iron. The USDA’s MyPlate guidance is a workable template, and the breakdown of vitamins for growth lists what each nutrient does.
Supplements marketed as height boosters haven’t earned that claim. A supplement makes sense when a doctor has confirmed a deficiency, but food covers most kids’ needs.
What Happens If You Drink Energy Drinks Regularly?
Regular use creates problems that a single can doesn’t. The main ones are caffeine tolerance, dependence, and withdrawal. A teen who drinks one daily and then skips it often gets a headache, irritability, and fatigue, which feels like proof the drink is needed.
Sleep debt accumulates as well, since caffeine keeps pushing bedtime later. Sugar-sweetened versions add dental risk, because both the sugar and the acidity attack enamel, and sipping over hours is worse than drinking quickly. The effects depend on the product, the amount, the timing, individual sensitivity, and other caffeine sources like soda, tea, and coffee. For a look at the sugar side specifically, read whether sugar stunts growth.
Signs You’ve Had Too Much Caffeine
Too much caffeine usually announces itself. Common signs include jitteriness, tremor, restlessness, headache, nausea, trouble sleeping, and a pounding or fast heartbeat (palpitations).
Cutting back, drinking water, and waiting it out resolves most mild cases. Severe symptoms are different. Chest pain, fainting, seizures, or an irregular heart rhythm need emergency care right away. For a suspected overdose or a question about how much is too much, Poison Control at 1-800-222-1222 is available around the clock.
Healthier Ways to Get Energy Without Energy Drinks
Real energy mostly comes from sleep, food, water, and movement. That sounds boring, but it works better than caffeine for sustained focus.
Consider the situations that push teens toward a can. Early school start times and late-night SAT or ACT prep both reflect sleep debt, and caffeine only masks it. A consistent sleep schedule, even on weekends, does more than any drink. Regular meals help too, and a balanced snack of whole grains plus protein, such as peanut butter on whole wheat toast or yogurt with fruit, gives steadier fuel than sugar. Water fixes more afternoon slumps than people expect, since mild dehydration feels a lot like tiredness.
Physical activity helps too. A ten-minute walk between study blocks tends to lift alertness within minutes. For gaming marathons and long holiday car trips, planned breaks and real snacks beat stacking cans. The list of tips to grow taller naturally covers many of the same habits.
Frequently Asked Questions About Energy Drinks and Growth
Can Energy Drinks Stop You From Growing at 14?
No evidence shows that an energy drink stops growth at 14. Most teens are mid-puberty at that age, so sleep and nutrition matter a lot. Caffeine can cut into both, which is the real reason to limit it.
Can Energy Drinks Stop You From Growing at 16?
No, and caffeine intake isn’t a reliable predictor of final height. Many teens are still growing at 16, particularly boys, as the guide to when boys stop growing explains. Girls typically finish earlier, a timeline covered in when girls stop growing.
Does Red Bull Stunt Your Growth?
Red Bull hasn’t been shown to stunt growth. The brand isn’t the issue, since the same reasoning applies to any caffeinated drink. Its 80 mg per small can is modest, but the sugar and the late-day timing are what matter for teens.
Does Monster Stunt Your Growth?
No direct link between Monster and shorter height has been established. The caffeine and sugar in a 16-ounce can are the concerns, particularly when it’s finished in one sitting or paired with other caffeine sources.
Does Caffeine Affect Puberty?
Caffeine hasn’t been shown to speed up or delay puberty. Puberty timing is driven by hormones, genetics, and body composition. The indirect route is sleep, since poor sleep can disrupt hormone patterns.
Will One Energy Drink Affect Your Height?
One energy drink won’t change adult height. It can still cause a racing heart, jitters, or a bad night’s sleep that same day.
Do Energy Drinks Stunt Your Growth? The Evidence-Based Bottom Line
Current evidence doesn’t show that energy drinks directly reduce adult height. But that doesn’t make them harmless, because caffeine and sugar can wear down sleep, diet quality, and heart health in kids and teens. A pediatrician is the right person to ask about any child with a heart condition, sleep problems, or growth that’s slipping behind the expected curve.
Jay Lauer is a health researcher with 15+ years specializing in bone development and growth nutrition. He holds a B.S. in Kinesiology and is a certified health coach (ACE). As lead author at HowToGrowTaller.com, Jay has published 300+ evidence-based articles, citing sources from PubMed and NIH. He regularly reviews and updates content to reflect the latest clinical research.