Creatine is the most-studied performance supplement in sports nutrition. Published research on adult athletes is extensive and supports modest performance benefits in strength and short-duration high-intensity activities. The picture for adolescent athletes is more complicated.
This piece is for the parent whose kid (or kid’s friend, or kid’s club teammate) is asking about creatine.
What creatine is.
Creatine is a compound the body makes from amino acids. It is stored in muscle and converted to phosphocreatine, which donates energy to the ATP cycle during short, high-intensity efforts (about 0 to 10 seconds of maximum exertion).
Dietary sources: meat and fish. Vegetarian and vegan athletes have lower baseline creatine stores.
Supplement form: creatine monohydrate is the most-studied form. Other forms (HCl, ethyl ester, buffered) are marketed as superior; the published evidence does not support meaningful differences.
What the published research shows in adults.
Modest improvements in strength, power, and high-intensity exercise performance (1 to 10 percent in various measures). Most consistent in repeated short sprints or strength sets.
Increased muscle mass (1 to 2 kg over weeks of loading), partly water retention and partly true hypertrophy.
Some evidence of cognitive benefits, particularly in sleep-deprived states.
Some evidence of neuroprotective effects in concussion recovery research, though this is preliminary.
Side effects: weight gain (water retention), occasional GI upset at loading doses. No documented long-term harm in healthy adults at recommended doses.
The American Academy of Pediatrics (AAP) position on supplements broadly.
The American Academy of Pediatrics’ position on performance-enhancing supplements in youth athletes has historically been conservative. The published statement: pediatric and adolescent athletes should not use performance-enhancing supplements, and the AAP recommends that pediatricians counsel families against supplement use.
The position predates the more recent published research on creatine specifically in adolescents.
The published research on adolescent creatine, briefly.
Several published studies have examined creatine supplementation in adolescents (typically ages 14 to 18). The findings:
Performance benefits similar to those documented in adults.
No documented harm to kidney or liver function in healthy adolescents at recommended doses.
No documented harm to growth, bone development, or hormonal markers.
Studies are smaller and shorter than adult research; long-term safety data in adolescents is less established than in adults.
The International Society of Sports Nutrition’s position stand (2017) supports creatine use in adolescent athletes under specific conditions (educated supervision, established maturity, safe practices). The AAP has not formally updated its position to align with this view.
The result: a clinical gray zone where the published evidence is reassuring but the major pediatric professional society remains conservative.
The practical conversation with a youth athlete.
For an athlete under 14: creatine is not appropriate. The supplement is not necessary at this developmental stage and the risk-benefit math does not favor use.
For an athlete 14 to 17:
The published evidence on creatine specifically does not show harm at recommended doses.
The marketing-driven supplement industry produces many products with poor quality control. Adolescent athletes are exposed to mis-marketed products that contain undisclosed ingredients.
The dietary approach (adequate protein, adequate calories, adequate sleep, structured training) produces 80 percent of the available performance improvement creatine might add.
If the family decides to use creatine, U.S. Anti-Doping Agency (USADA)-Certified or NSF Certified for Sport products are the only ones with verified content. Many widely-sold creatine products have failed third-party testing for contamination with banned substances.
Dosing: 3 to 5 grams per day, no loading required. Daily, with adequate fluid intake.
The contamination issue.
The supplement industry is regulated less rigorously than pharmaceutical products. Independent testing of creatine products has found:
Lower-than-labeled creatine content in some brands.
Contamination with banned substances (anabolic steroids, stimulants) in some products.
Heavy metal contamination in some products.
For competitive athletes (NCAA, professional, Olympic-tested), this matters legally as well as health-wise. The USADA’s “Supplement 411” resource is the standard reference.
NSF Certified for Sport, Informed-Sport, and USP Verified are the third-party certifications that verify content.
The “everyone is taking it” social pressure.
In some high-school sports cultures, creatine use is normalized as part of training. Parents whose kids report “everyone takes it” should know:
Surveys of high school athletes consistently find use rates around 5 to 15 percent depending on sport and region. “Everyone” is exaggeration.
The performance edge is real but modest. The kid who skips creatine and works on sleep, nutrition, and training detail closes most of the gap.
For coaches.
A team policy on supplement use clearly communicated to athletes and families. Most National Collegiate Athletic Association (NCAA)-aligned high school programs prohibit creatine. Most rec and club programs are silent.
Education on third-party certification. Athletes who choose to use any supplement should use Certified for Sport, Informed-Sport, or USP Verified products only.
For parents.
The decision is yours. The published evidence is reassuring at the high-school age. The AAP remains conservative. The dietary and sleep approaches produce most of the available benefit.
If you decide to allow creatine, the third-party certification is worth not skipping. Walmart-brand or online-cheap creatine without certification is a contamination risk.
For kids under 14, the answer is no. The evidence does not support need.
The honest read. Creatine sits in a complicated space between published-research support and pediatric-society caution. For adolescent athletes 14 and up, the choice is reasonable either way with appropriate supervision and certified product. For younger kids, no. The performance edge is real and modest; the sleep-nutrition-training fundamentals matter more.
For families curious, the conversation with the pediatrician (or a sports-medicine specialist) is the right starting point. The decision is not a moral one but a risk-benefit one. The published evidence increasingly supports informed use; the cautious default remains defensible.