Creatine Has Been Deemed Safe (Again) — But Is It Safe for Kids?

 

The Study Everyone’s Talking About

A 2025 meta-analysis led by Dr. Richard Kreider and colleagues analyzed 685 clinical trials involving over 26,000 participants to evaluate creatine’s safety.

The results?

Participants taking creatine reported no more side effects than those taking a placebo, 4.6% versus 4.2% (Kreider et al., 2025).

Across hundreds of studies (some lasting more than a decade) there were no meaningful differences in gastrointestinal issues, cramping, renal markers, or any of the 49 side effects examined.

The authors concluded:

“Creatine supplementation does not increase the prevalence or frequency of side effects relative to placebo.”

So, once again, the data affirm it: creatine monohydrate is remarkably safe for healthy adults.

But What About Kids?

That’s where the nuance begins.

Nearly all studies in that meta-analysis involved adults; athletes, military personnel, and clinical populations. Direct data on children are far more limited.

Still, creatine isn’t foreign to the body. It’s a naturally produced compound made from amino acids and stored in muscle tissue to help regenerate ATP, the body’s primary energy currency, powering nearly all cellular processes.

It’s also found in red meat and fish, two foods many children (especially picky eaters, vegetarians, or plant-based families) consume in low amounts. That can lead to lower baseline creatine stores, which may slightly reduce muscular energy capacity, recovery, and even cognitive function (Wyss & Kaddurah-Daouk, Physiol Rev, 2000).

For those reasons, children who train hard or eat little animal protein may physiologically benefit from supplemental creatine. Not for vanity or “enhancement,” but to reach normal functional levels seen in omnivorous adults.

How Creatine Could Help Youth

Emerging research on adolescents (13–18 years) shows that creatine supplementation can:

• Improve strength and power output during short, intense efforts.

• Enhance recovery between workouts or sports sessions.

• Support healthy muscle growth and hydration.

• Potentially aid cognitive performance and brain energy metabolism, which are energy-intensive during growth years.

In clinical populations, such as children with neuromuscular disorders, traumatic brain injury, or genetic creatine synthesis deficiencies, creatine has even been used therapeutically, with strong safety outcomes (Allen et al., Am J Phys Med Rehabil 2009).

So while we don’t yet have thousands of pediatric data points, every existing line of evidence points to safety and potential benefit when used responsibly.

Where to Draw the Line

Here’s what the data don’t tell us yet:

• We have very few studies on children under 13.

• Long-term safety data (multi-year follow-ups) in children are limited.

• While there’s no evidence of harm, caution and medical supervision remain appropriate (especially for prepubescent kids).

That’s why any consideration of creatine in younger populations should be individualized, supervised, and conservative in dosing.

What the Major Organizations Say

• International Society of Sports Nutrition (ISSN):

  Creatine is “one of the most effective and safest supplements available.”

  ISSN allows for adolescent use if the athlete is post-pubertal, supervised, and using a quality monohydrate source (Buford et al., JISSN 2007; Kreider et al., JISSN 2017).

• American Academy of Pediatrics (AAP):

  Acknowledges that short-term use appears safe but does not recommend routine use under 18 until more long-term data exist (AAP, Pediatrics, 2001; 2020).

• American College of Sports Medicine (ACSM):

  Echoes that pre-pubertal use is insufficiently studied and advises medical supervision for any underage use (ACSM, 2021).

TLDR:

• ISSN: cautious green light with supervision.

• AAP & ACSM: cautious yellow light until more data are available.

The Responsible Path Forward

If creatine is ever considered for a youth athlete or highly active teen, it should follow these principles:

• Use creatine monohydrate only. No blends or “energy” formulas.

• Start low (around 1 gram/day). There’s no need for a loading phase.

• Use only NSF Certified or Informed Choice-tested products to ensure purity.

• Monitor for tolerance (e.g., stomach upset, headaches).

• Re-evaluate with a healthcare provider every few months.

Supplements should always complement a strong foundation of diet, sleep, and training discipline; never replace it.

Clearing Up Common Misconceptions

“Creatine makes you bloated.”

Not true. The small water increase is inside muscle cells, where it supports function, not under the skin.

“It damages your kidneys.”

In healthy people, dozens of long-term trials (some over 10 years) show no harmful effects on kidney, liver, or cardiovascular markers. Even at doses far higher than a child’s conservative use (Kreider et al., 2025).

“It’s not natural.”

Creatine is already in your muscles. Supplementation simply restores levels found in high-meat diets.

Ethics and Perspective

Organizations like the AAP raise valid concerns; not about creatine’s chemistry, but about culture: the idea that young athletes might feel pressured to “supplement” to compete.

That’s fair. But it’s also an argument for education over fear.

When parents, coaches, and professionals understand the science, they can make rational, informed decisions rather than blanket rejections.

My Personal Stance

Based on current evidence, I would feel comfortable if my own kids took around 1 gram of creatine per day, assuming:

• They’re healthy and active.

• They eat a balanced diet.

• I’ve vetted the product for purity.

That dose is one-fifth to one-third of a standard adult maintenance dose and well below the levels studied in safety research. It’s a biologically reasonable and conservative amount, roughly equivalent to what’s found in half a pound of red meat.

The Rational Takeaway

• Creatine monohydrate is one of the most studied and safest performance supplements ever tested.

• It has a clear safety record in adults, growing support in adolescents, and theoretical benefits for under-consuming or highly active youth.

• The gap isn’t danger it’s data.

• For pre-teens, use discretion and professional guidance.

• For older adolescents in structured sports, low-dose supervised use may be reasonable.

Creatine isn’t a steroid, a stimulant, or an endocrine disruptor. It’s a nutrient your body already produces and the fear around it has far outlasted the evidence.

But to be absolutely clear.

I’m not telling anyone else to give creatine to their children.

I’m saying that, given decades of data, mechanistic understanding, and the absence of risk in healthy users, I personally would not be concerned under those conditions.

Legal and Ethical Disclaimer

This article is for educational purposes only.

It does not constitute medical, dietary, or pediatric advice, nor is it intended to diagnose, treat, cure, or prevent any disease.

Readers should consult a licensed healthcare provider before introducing any supplement (including creatine) into a child’s routine.

All research findings cited are publicly available from peer-reviewed journals and organizational position statements.

 

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References

• Kreider RB et al. (2025). Safety of creatine supplementation: analysis of the prevalence of reported side effects in clinical trials and adverse event reports. J Int Soc Sports Nutr.

• Buford TW et al. (2007). ISSN Position Stand: Creatine Supplementation and Exercise. JISSN 4(1):6.

• Kreider RB et al. (2017). ISSN Position Stand: Safety and Efficacy of Creatine Supplementation in Exercise, Sport, and Medicine. JISSN 14(1):18.

• American Academy of Pediatrics (2001, 2020). Creatine Use Among Young Athletes; Legal Performance-Enhancing Substances in Children and Adolescents. Pediatrics.

• American College of Sports Medicine (2021). ACSM Expert Consensus Statement: Nutritional Ergogenic Aids. Med Sci Sports Exerc.

• Jagim AR et al. (2018). Creatine Supplementation in Children and Adolescents: A Brief Review. Front Nutr 5:115.

• Candow DG et al. (2022). Creatine Supplementation and Exercise in Youth. Pediatr Exerc Sci 34(1):45–53.

• Allen PJ et al. (2009). Creatine Supplementation in Children with Traumatic Brain Injury. Am J Phys Med Rehabil 88(5):437–445.

• Wyss M, Kaddurah-Daouk R. (2000). Creatine and Creatinine Metabolism. Physiol Rev 80(3):1107–1213.