As a parent, you're probably hearing about creatine from coaches, other sports parents, or your teenager themselves. It's one of the most widely sold supplements in the world, and the pressure to use it starts younger every year. Before you make a decision, here is a plain-language summary of what the research actually says — including the important gaps. Updated June 10, 2026.
Quick Answer
The current evidence does not support creatine supplementation for children under 18. Research is extremely limited, and the one controlled study in kids found no strength benefit. Most experts advise against it — not because it's proven dangerous, but because there's no good reason for healthy, growing children to take it.
In This Guide
- What is creatine and how does it work?
- What does the research in kids actually show?
- Side effects: What parents need to know
- Does creatine harm the kidneys?
- Hair loss and injury risk
- How much do people take?
- Boys vs. girls: are there differences?
- Bottom line for parents
- FAQ
What Is Creatine, and How Does It Work?
Creatine (commonly sold as creatine monohydrate) is a compound your body makes naturally from three amino acids: glycine, arginine, and methionine. It's also found in meat, fish, and poultry. Most adults naturally produce about 1–2 grams per day and get another 1–2 grams through food.
In the body, creatine is converted to phosphocreatine, which muscles use to rapidly regenerate adenosine triphosphate (ATP) — the molecule that powers virtually every cell in the body. This fast energy recycling is why creatine is useful for short, intense efforts like sprinting or powerlifting.
With more than 5,000 clinical trials on PubMed since 1965, creatine is one of the most studied supplements in existence. In adults who combine it with strength training, the evidence for increased muscle strength is solid.
Key point
Creatine is not a steroid. It does not work like testosterone or anabolic steroids, and it does not carry the same risks.
What Does the Research in Kids Actually Show?
Here is where things get thin. Despite the enormous amount of creatine research in adults, very little of it has been conducted in children, and for a legitimate reason: researchers are rightly cautious about enrolling minors in supplement trials, especially when there is no clear medical need.
The most relevant controlled study I could find gave creatine (or a placebo) to 12 children ages 5–12 who had lupus, for 12 weeks. The dose was 0.11 grams per kilogram of body weight per day — roughly 6.8 grams for a 100-pound child, which is similar to a standard adult maintenance dose. The result? No significant side effects were observed, but creatine also did not raise muscle creatine levels or improve strength. It's worth noting that lupus may have affected the outcome, so we can't fully generalize.
A 2026 systematic review looked at creatine monohydrate use in adolescents and physically active youth. It found the supplement was generally well tolerated, with no consistent signs of problems affecting the kidneys, liver, heart, blood pressure, blood sugar, or cholesterol. No serious adverse events were linked to creatine. However, the authors were careful to note that only five studies met their quality standards, some were small or included mixed groups, and long-term data in healthy teens is still lacking.
Important caveat
“No serious side effects found so far” is not the same as “proven safe for kids.” The research base in children is small, and absence of evidence is not evidence of safety.
Side Effects: What Parents Need to Know
In adults, creatine has a strong safety profile. The most commonly reported effect is modest water retention, which may cause a 2–5 lb increase in body weight. This is water in the muscles, not fat or muscle tissue. Some individuals report more (one teenage hockey player I spoke with reported gaining 20 lbs, which is unusual), and some report none at all — the research is inconsistent on how often it occurs.
Other concerns that circulate online include:
- Hair loss: One rugby study found higher levels of DHT (a testosterone metabolite associated with hair loss) in creatine users, but no one actually measured hair loss. That study has not been replicated. There is currently no solid evidence linking creatine to hair loss.
- Rhabdomyolysis: This is a serious condition caused by extreme muscle breakdown, and creatine has been proposed as a contributing factor in some cases. Evidence is limited, and the relationship is not established. I've been teaching about this disorder for over 15 years and am not convinced creatine causes rhabdo. Anyone experiencing severe muscle pain, dark urine, or swelling after exercise should see a doctor immediately, regardless of supplement use.
- Tendon and ligament injuries: Adult studies have not shown an increased injury rate. However, a theoretical concern exists: creatine may allow someone to place more load on their connective tissue than it's ready to handle. In still-growing children and teenagers, whose tendons and ligaments lag behind their muscles in development, this could be a meaningful concern. This is speculative, not proven, but worth taking seriously.
Does Creatine Harm the Kidneys?
This is one of the most common parental concerns, and it deserves a direct answer.
When creatine breaks down, it produces creatinine, a different compound used as a marker of kidney function. A doctor seeing elevated creatinine on a blood test might flag it — but if a patient is taking creatine supplements, that elevation is likely supplement-related and usually returns to normal after stopping. This has sometimes been misinterpreted as kidney damage.
For people with normal kidney function, there is currently no clinical study documenting that creatine causes kidney damage or failure. Several studies have specifically investigated this and found no harm.
Caution
If your child has only one kidney, reduced kidney function, or any existing kidney disease, creatine should be avoided. This is precautionary — not because damage has been documented, but because adding stress to an already compromised system is not worth the risk.
What About Hair Loss and Injuries?
The hair loss question stems from a single study in rugby players that measured DHT levels — not actual hair. DHT is associated with androgenetic alopecia in people who are genetically predisposed to it. The study has not been replicated, and no study has directly linked creatine use to measurable hair loss. As of now, the evidence does not support this as a real concern.
For injuries, adult research does not show increased connective tissue damage from creatine use. The theoretical concern in growing kids — that rapidly increasing muscle capacity could overload tendons and ligaments that haven't caught up — has not been studied directly. It remains an open question.
How Much Do Adults Typically Take?
This context is useful for parents who want to understand what their teenager might be using:
| Phase | Typical Dose | Duration |
|---|---|---|
| Loading phase | 20–25 g/day | 5–7 days |
| Maintenance phase | 3–5 g/day | Ongoing |
| Simplified approach | 3 g/day | Week 1 and beyond |
A 1996 study found that taking 3 grams per day for one week loaded muscles with creatine as effectively as the higher loading protocol. Many practitioners and researchers now skip the loading phase entirely. Taking less also costs less.
Creatine absorption improves when taken with a carbohydrate source (juice, for example), because insulin helps muscles take it up. Post-exercise timing may also improve uptake.
Regarding cycling — periodically stopping and restarting use — there is no clinical evidence this is necessary with creatine. It is a practice borrowed from steroid users trying to avoid hormone-related side effects, which don't apply to creatine.
Boys vs. Girls: Are There Differences in Kids?
The vast majority of creatine research has been done in adult men. Some research includes adult women, but there is almost nothing specifically examining teenage girls. Adult women tend to store slightly more creatine in their muscles than men — possibly because the body compensates for lower baseline muscle mass. Whether this applies to adolescent girls is unknown.
If your daughter is asking about creatine, the honest answer is that we don't have enough data to know how it affects younger teenage girls specifically.
Bottom Line for Parents
My Recommendation
Based on the available evidence, I do not recommend creatine supplementation for healthy children and teenagers. The research is too limited to confidently say it's safe long-term in this population, and more importantly, the evidence doesn't show it actually makes kids stronger.
Kids have something no supplement can replicate: youth. Their metabolic rates are faster, their bodies respond to training more efficiently, and they don't need pharmaceutical assistance to develop athletically at their age. A good training program, adequate sleep, and proper nutrition will outperform any supplement at this stage of development.
If your child has a specific medical condition for which creatine has been studied therapeutically — certain neuromuscular disorders, for example — that is a different conversation, and one to have with a physician.
Frequently Asked Questions
Is creatine safe for a 16-year-old?
Current research does not confirm it is safe for teenagers long-term. A 2026 systematic review found no serious adverse effects in adolescents, but only five qualifying studies existed and long-term data is absent. Most sports medicine and pediatric nutrition experts advise against it for healthy teens.
Will creatine make my kid a better athlete?
In adults, creatine improves performance in short-burst, high-intensity activities like sprinting and weightlifting. The one controlled study in children found no strength benefit. There is currently no solid evidence it improves athletic performance in kids.
Can creatine stunt growth?
There is no clinical evidence that creatine stunts growth. This concern has not been directly studied, and the mechanism by which it would do so is not established. That said, the lack of evidence against it is not the same as evidence that it's safe during the growth years.
What's the minimum age for creatine supplementation?
No universal minimum age has been established, and the position of the International Society of Sports Nutrition (ISSN) may surprise some parents. In their 2017 position stand, the ISSN states that creatine use in younger athletes is acceptable if all of the following conditions are met:
— The athlete is past puberty and involved in serious, competitive training
— The athlete is eating a well-balanced, performance-enhancing diet
— Both the athlete and parents fully understand the effects of creatine
— Parents have given their approval
— Use is supervised by a parent, coach, trainer, or physician
The ISSN also notes that the “under 18” warning labels on creatine products are likely a legal precaution by manufacturers, not a reflection of the science.
That said, this guidance applies to post-pubescent athletes in serious training programs and not to recreational youth sports or children who simply want to get bigger or faster.
My own position remains conservative: for most kids, the benefits don't justify the use, and youth itself is the most powerful performance advantage they have. But if your teenager is a serious competitive athlete, past puberty, eating well, and has medical supervision, the ISSN's framework is a reasonable one to discuss with their doctor.
Is creatine different from steroids?
Yes. Creatine is not a steroid. It does not affect hormone levels in the way that anabolic steroids do. It works through the body's energy system, not the hormonal system, and does not carry the same risks as testosterone or other anabolic compounds.
What type of creatine is best?
Creatine monohydrate has been on the market since the 1990s and accounts for approximately 99% of all clinical research. Despite marketing claims, no alternative form (HCL, buffered creatine, liquid creatine) has been shown in head-to-head trials to outperform it. Monohydrate is also the least expensive option.
My child has one kidney. Can they take creatine?
No. Anyone with a single kidney or reduced kidney function should avoid creatine supplementation. While kidney damage from creatine has not been documented in people with normal kidney function, placing additional metabolic load on a compromised kidney is not advisable.
