Introduction
As researchers investigating creatine supplementation, we have become increasingly concerned about reports that government agencies are attempting to restrict the sale of dietary supplements, including dietary supplements containing creatine, to children and adolescents. Creatine is a naturally occurring compound found in every cell in the human body that plays a critical role in cellular metabolism. The daily turnover of creatine is about 2–4 grams/day, depending on muscle mass and physical activity levels (1, 2). About half of the daily need for creatine is synthesized in the body from amino acids (arginine, glycine, methionine) and stored as free creatine or phosphocreatine in muscle, brain, heart, and other tissues (1). The remaining daily need to maintain normal cell and tissue levels of creatine primarily comes from consuming meat and fish. For example, one pound (16 oz.) of red meat and fish contains about 1–2 grams of creatine. In the cells, creatine changes into phosphocreatine, a compound vital in maintaining cellular energy availability, particularly during metabolically stressful conditions like intense exercise, periods of injury or illness, and some metabolic diseases with applications for diverse populations across a wide age range.
Creatine is essential to promote normal energy metabolism and healthy growth and maturation in children and adolescents (Figure 1). Low dietary creatine intake has been associated with slower growth, less muscle mass, and higher body fat in children and adolescents (3). Adolescents have been reported to consume lower than recommended amounts of creatine in the diet. Despite common misconceptions, creatine has a well-supported safety profile and has been repeatedly shown to be safe, even with long-term supplementation (4, 5). Additionally, there is no evidence that children and adolescents purchasing and taking creatine-containing supplements cause adverse health effects and/or increase the likelihood of eating disorders or use of performance-enhancing drugs. Conversely, individuals who take creatine are interested in improving health, exercise performance, gaining muscle mass, and improving their physique. While meat and fish are natural sources of creatine, they can be expensive and high in calories. A food-first approach is always recommended, meaning that dietary sources of creatine should be prioritized whenever possible. However, due to cost, accessibility, and other potential barriers, dietary supplementation of creatine monohydrate or supplements and foods fortified with creatine monohydrate are a cost-effective way to ensure that children and adolescents obtain enough creatine in their diet to promote healthy growth and maturation. Creatine supplementation has also been shown to be safe and have clinically meaningful benefits in pediatric disorders, including acute lymphoblastic leukemia, Duchenne muscular dystrophy, and disorders of creatine metabolism.
Figure 1
Legislation restricting the sale of creatine-containing products to children and adolescents is not based on scientific evidence which strongly supports the importance of creatine in the diet and its safety as a supplement. Moreover, creatine supplementation is not associated with eating disorders (6), and any claim suggesting the contrary is not rooted in scientific evidence. These false claims and reckless speculation regarding the dangers of creatine supplementation may discourage the use of creatine by minors, parents of minors, and healthcare professionals from recommending creatine supplementation, a nutrient that offers a plethora of health and performance-related benefits for all populations. This may further reduce the availability of creatine in children's and adolescents' diets, impairing growth and maturation and negatively impacting the development of a healthy body composition. Lobbying groups and legislatures should base laws on the available science, not speculation, unfounded hypotheses, or politics. We provide the following scientific facts about creatine to help those proposing legislative efforts to limit the availability of creatine in children and adolescents make more informed legislation.
Creatine facts
Creatine is a naturally occurring compound that is a primary constituent of phosphocreatine stored in cells and is needed to provide cellular energy.
The daily need for creatine is about 2–4 grams/day, depending on muscle mass and physical activity levels. About half of the daily need for creatine is synthesized in the body from the amino acids arginine, glycine, and methionine. The remainder must be obtained from the diet and/or dietary supplements.
The best sources of creatine in the diet are meat and fish, which contain about 1–2 grams of creatine per pound. Since meat and fish are expensive (about $4.00 to $18.00 USD per pound) and contain large amounts of protein and fat (i.e., about 450 to 1,400 kcals/pound), dietary supplementation of creatine monohydrate (about $0.03–$0.05 USD per gram) is a more cost-effective way to ensure individuals obtain enough creatine in their diet to meet daily needs (1).
Creatine supplementation can also be an effective dietary strategy for vegans or vegetarians who often do not consume enough creatine in their diet (7).
Analysis of the National Health and Nutrition Examination Survey (NHANES) database revealed that 4,291 boys and girls aged 2–19 years (3) consumed an average of 1 gram/day of creatine in their diets, and higher dietary intake of creatine (>1.5 grams/day) was associated with greater height and weight compared to those consuming diets lower in creatine. Dietary creatine intake was also positively correlated with lean mass and bone mineral content while negatively correlating with fat mass and body fat percentage in 1,273 children and adolescents between the ages of 8 and 19 years (8). These findings indicate that the dietary availability of creatine in children and adolescents may positively affect growth, maturation, and body composition. Yet, in recent years, younger populations have been reported to have decreased dietary creatine intake (9), underscoring the need for children and adolescents to consume more creatine in their diets.
The adequate intake (AI) for creatine is 7 mg/day for infants aged 0–6 months who are exclusively breastfed and 8.4 mg/day for infants aged 7–12 months (10).
The NHANES database also revealed that lower dietary creatine intake (i.e., <0.95 grams/day) was associated with poorer cognitive function test performance among 1,340 adults ≥60 years compared to those consuming diets with >0.95 grams per day (11). Additionally, analysis of dietary creatine intake among 1,500 adults ≥65 years revealed that 70% of this cohort consumed less than recommended amounts of creatine in their diets (<0.95 grams per day), and low dietary creatine intake was associated with a greater risk of angina pectoris and liver conditions compared to those consuming >1.0 grams per day of dietary creatine (12). These findings highlight the need for older individuals to increase dietary intake of creatine.
High-quality creatine monohydrate is Generally Recognized as Safe (GRAS) by the Food and Drug Administration (13) and is considered safe for human consumption in dietary supplements in the United States, Canada, Europe, Australia, South Korea, Japan, and China. Efforts are underway to fortify creatine in food and to position it as a conditionally essential nutrient.
Over 680 peer-reviewed clinical trials have been conducted on creatine supplementation (95% as creatine monohydrate) since the 1970s, involving over 12,800 study participants administered creatine supplements in dosages up to 30 grams per day for 14 years in populations ranging from infants to very elderly individuals in both healthy and clinical populations. No clinical adverse events were reported in any clinical trial study, and the minor side effects reported were infrequent and not significantly different from over 13,500 participants consuming placebos in these studies. This includes a comparison of studies conducted on children and adolescents (<18 years), young adults (19–45 years), middle-aged adults (46–65 years), and older adults (>65 years). Moreover, an analysis of over 28.4 million adverse event reports in the United States, Canada, Australia, and Europe, using SIDER 4.1 over the last 50 years, reveals that creatine has rarely been mentioned (about 0.0007%) despite billions of doses taken worldwide over the past 30 years. While adverse event reports do not imply causality, the lack of reports worldwide supports findings from clinical trials that creatine is safe for individuals of all ages.
Creatine monohydrate supplementation (e.g., 0.3 grams/kg/day for 5–7 days and 0.05 to 0.15 grams/kg/day thereafter) is the most effective nutritional strategy to increase and maintain tissue creatine content (1). Many studies indicate that creatine monohydrate supplementation increases gains in strength, high-intensity exercise performance, and muscle mass during resistance-exercise training (5, 14). It is considered the most effective nutritional strategy for individuals wanting to maintain and increase strength (5). Creatine supplementation has also been reported to reduce the risk of injury, including the severity of concussion and traumatic brain injury (2). Restricting the availability of creatine to children and adolescents may put them at risk for injury or compromise recovery following injury or disease management for neurocognitive disorders.
Emerging evidence indicates that creatine monohydrate supplementation possesses a number of health benefits during pregnancy and infancy (15), for children and adolescents (16), for women (17), for adults involved in exercise training (5), and for older populations (18). Additionally, there is evidence that creatine monohydrate supplementation enhances immunity (19) and can promote heart (20), vascular (21), and brain health (22). Therapeutic benefits have been reported in the management of diabetes (23), sarcopenia (24–27), osteoporosis (25, 28), patients with neuromuscular diseases (29), and rehabilitation (4, 24, 30–36). Furthermore, data shows that creatine slows the progression of some forms of cancer (37, 38) and may have therapeutic benefit in helping cancer patients maintain muscle mass (39) and prevent body fat accumulation during maintenance chemotherapy that includes corticosteroids (40). For this reason, it is recommended that all individuals consume 2–3 grams per day of creatine to promote general health (2, 5, 41).
Several studies, particularly in older populations, have shown that consuming diets higher in creatine (>0.95 grams/day) is associated with better cognition (6) and that creatine supplementation may improve cognitive function (42–45).
No evidence is available to demonstrate that consuming creatine monohydrate increases the prevalence of eating disorders or adversely affects individuals being treated for psychiatric conditions (6). Conversely, analysis of the NHANES database among 22,692 adults indicates that low dietary creatine intake is associated with a greater incidence of depression (45), which is often related to eating disorders and/or poor body image perceptions (46). Furthermore, creatine supplementation has been suggested as a potential nutritional adjunctive strategy to help manage depression and reduce suicidal ideations in individuals unresponsive to some psychiatric medications (47).
In summary, the robust body of evidence supports the safety and multifaceted benefits of creatine supplementation across all age groups. We urge lobbyists, policymakers, and health agencies to consult with leading creatine scientists, and to consider the full spectrum of scientific data before implementing restrictions that would have adverse public health and performance implications. This opinion letter was endorsed by leading creatine scholars (Table 1).
Table 1
| Name | Position | Institution |
|---|---|---|
| Richard B. Kreider, PhD, FACSM, FISSN, FACN, FNAK | Professor and Director, Exercise & Sport Nutrition Lab | Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX, United States |
| Andrew R. Jagim, PhD, CSCS*D, CISSN | Director of Sports Medicine Research | Mayo Clinic Health System, La Crosse, WI, United States |
| Jose Antonio, PhD, FISSN, FNSCA | Professor | Exercise and Sport Science, Nova Southeastern University, Davie, FL, United States |
| Michael J. Ormsbee, PhD, FACSM, FISSN, FNAK, CISSN, CSCS*D | Professor and Director | Institute of Sports Sciences & Medicine, Florida State University, Tallahassee, FL, United States |
| Chad M. Kerksick, PhD, FACSM, FNSCA, FISSN, CISSN, CSCS*D | Assistant Dean & Professor, Director, Exercise and Performance Nutrition Lab | Lindenwood University, St. Charles, MO, United States |
| Douglas S. Kalman, PhD, RD, CCRC, FACN, FISSN | Clinical Associate Professor - Nutrition | Dr. Kiran C. Patel College of Osteopathic Medicine, Nova Southeastern University, Davie, FL, United States |
| Diego A. Bonilla, ISAK 3 | Scientific Director & Researcher | DBSS Research Division – Dynamical Business & Science Society; NUTRAL Research Group, Universidad CES, Medellin, Colombia |
| Jeffrey R. Stout, PhD, FNAK, FNSCA, FACSM, FISSN | Professor & School Director | School of Kinesiology and Rehabilitation Sciences, University of Central Florida, United States |
| Maurizio Balestrino, MD | Associate Professor of Neurology | Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal-Child Sciences (DINOGMI), University of Genoa, Italy |
| Scott C. Forbes, PhD, CSEP-CEP, FISSN | Associate Professor | Department of Physical Education Studies, Brandon University, Canada |
| Susan M. Kleiner, PhD, RD, CNS-E, FACN, FISSN | Owner/Founder | High Performance Nutrition LLC, Mercer Island, WA, United States |
| Ann Frost Brown, PhD, CISSN | Associate Professor & Associate Dean | Department of Movement Sciences, University of Idaho, United States |
| Sergej M. Ostojic, MD, PhD | Professor | Department of Nutrition and Public Health, University of Agder, Norway |
| Drew E. Gonzalez, PhD, CISSN, CSCSD, TSAC-FD, SCCC | Research Associate | Exercise & Sport Nutrition Lab, Texas A&M University, College Station, TX, United States |
| Bill I. Campbell, PhD, CSCS, FISSN | Professor of Exercise Science | University of South Florida, Tampa, FL, United States |
| Eric S. Rawson, PhD, CSCS, FACM | Professor | Health, Nutrition, and Exercise Science, Messiah University, Mechanicsburg, PA, United States |
| Tim N. Ziegenfuss, PhD, CSCS, FISSN | CEO | The Center for Applied Health Sciences, Canfield, OH, United States |
| Mark A. Tarnopolsky, MD, PhD, FRCP(C) | Professor of Pediatrics | McMaster Children's Hospital, Hamilton, Ontario, Canada |
| Darren G. Candow, PhD, CSEP-CEP, FISSN | Professor | Faculty of Kinesiology and Health Studies, University of Regina, Regina, SK, Canada |
| Abbie E. Smith-Ryan, PhD, FACSM, FNSCA, FISSN | Professor & Associate Chair for Research | Department of Exercise & Sport Science/Nutrition, University of North Carolina, Chapel Hill, NC, United States |
| Stacey Ellery, BBioMedSc (Hons), PhD | NHMRC Emerging Leader Fellow (EL2), Head Bioenergetics in Reproduction Group | The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Clayton, VIC, Australia |
| Ralf Jäger, PhD, MBA, FISSN | Founder | Increnovo LLC, Whitefish Bay, WI, United States |
| Robert Wildman, PhD, RD, LD, CISSN | Research Associate | Department of Human Nutrition, Kansas State University, Manhattan, KS, United States |
| Craig Sale, PhD, FACSM | Professor of Human Physiology and Nutrition | Institute of Sport, Manchester Metropolitan University, Manchester, United Kingdom |
| Rick Collins, Esq., FISSN, NSCA-CSCS | Partner | Collins Gann McCloskey & Barry PLLC, Mineola, NY, United States |
| Michael D. Roberts, PhD | Auburn University Endowed Alumni Professor | School of Kinesiology, Auburn University, Auburn, AL, United States |
| Vargas-Molina Salvador, PhD | Researcher | Physical Education and Sport, Faculty of Medicine, University of Málaga, Spain; DBSS Research Division – Dynamical Business & Science Society |
| Susan J. Hewlings, PhD, RD | Sr Vice President of Scientific Affairs | Radicle Science, Cudjoe Key, FL, United States |
| Lem W. Taylor, PhD, FACSM, FISSN | Professor | Human Performance Lab, University of Mary Hardin-Baylor, Belton, TX, United States |
| Hamilton Roschel, PhD, RD | Associate Professor, Scientific/Executive Director | Center of Lifestyle Medicine, University of Sao Paulo, Sao Paulo, Brazil |
| Wagner Domingues, PhD, RD | Associate Professor | Research Group on Physical Activity and Rehabilitation for Special Groups, Air Force University, Rio de Janeiro, RJ, Brazil |
| Jeff Volek, PhD | Professor | Department of Human Sciences, The Ohio State University, Columbus, OH, United States |
| Bruno Gualano, PhD | Associate Professor | Center of Lifestyle Medicine, University of Sao Paulo, Sao Paulo, Brazil |
| Elfego Galvan, PhD, RD | Medical Student (MS-III) | A.T. Still University School of Osteopathic Medicine - Arizona, Mesa, AZ, United States |
| Philip D. Chilibeck, PhD, CSEP-CEP | Professor | College of Kinesiology, University of Saskatchewan, Saskatoon, SK, Canada |
| Jay R. Hoffman, PhD | Professor and Director | Sport Science Program, Ariel University, Ariel, Israel |
| Nicholas D. Barringer, PhD, RDN, CSSD, CSCS | Chief Academic Officer and Dean Graduate Studies | Lionel University, Carpinteria, California, United States |
ISSN members, international creatine researchers, and scholars supporting this statement.
Statements
Author contributions
RK: Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Software, Supervision, Validation, Writing – original draft, Writing – review & editing. AJ: Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Writing – original draft, Writing – review & editing. JA: Data curation, Formal analysis, Writing – review & editing. DK: Data curation, Formal analysis, Writing – review & editing. CK: Data curation, Formal analysis, Writing – review & editing. JS: Data curation, Formal analysis, Writing – review & editing. RW: Data curation, Formal analysis, Writing – review & editing. RC: Data curation, Formal analysis, Writing – review & editing. DB: Data curation, Formal analysis, Funding acquisition, Resources, Visualization, Writing – review & editing.
Funding
The author(s) declare that financial support was received for the research and/or publication of this article. The APC was funded by the DBSS Research Division.
Acknowledgments
We would like to express our sincere gratitude to the creatine scholars who have endorsed this opinion article (Table 1).
Conflict of interest
RK has conducted industry-sponsored research on creatine, received financial support for presenting at conferences about creatine, and has served as an expert witness throughout his career. Additionally, he serves as Chair of the Scientific Advisory Board for AlzChem (a company that makes creatine monohydrate), is a co-founder of the non-profit International Society of Sports Nutrition (ISSN), and a member of the scientific advisory boards for Oath Nutrition and Trace Minerals. AJ has consulted with and received external funding from companies selling certain dietary ingredients and has received remuneration from companies for delivering scientific conference presentations. AJ also writes for online and other media outlets on topics related to exercise and nutrition. In addition, AJ serves on the Scientific Advisory Board for AlzChem. JA is the CEO and co-founder of the International Society of Sports Nutrition (ISSN), an academic non-profit (501c3) sponsored by companies that manufacture, market, and sell dietary supplements. He is also a scientific advisor to brands including Bear Balanced®, Create®, Enhanced Games®, and Liquid Youth®. CK has consulted with and received external funding from companies that sell certain dietary ingredients and has received remuneration from companies for delivering scientific presentations at conferences and consulting services. CK also writes for online and other media outlets on topics related to exercise and nutrition. In addition, CK serves as a Scientific Advisor for NNB Nutrition, Oath Nutrition, and the Scientific Advisory Board for AlzChem. DK declares that over his career he has worked for Contract Research Organizations and others who have received research grants/contacts to execute studies for the pharmaceutical, foods, beverages, dietary supplement, and medical devices. DK co-directs a consultancy, Substantiation Sciences, consulting for the foods, beverages, dietary supplement consumer packaged goods, and other regulated industries. DK has also served as an Expert Witness for cases related to the pharmaceutical and dietary supplement industries. DK is a co-founder of the non-profit the International Society of Sports Nutrition. DK has been remunerated for presentations by companies within the pharmaceutical, foods/beverages and dietary supplement industries. DK serves as an unpaid member of the Scientific Advisory Committee for AlzChem. DB serves as the Scientific and Managing Director of KreaFood, an R&D&I project, and is a member of the “Creatine for Health” scientific advisory board for Alzchem Group AG. Additionally, he has served as a scientific consultant for dietary supplement brands in Europe and Colombia, researched nutritional supplements funded by academic institutions, and received honoraria for presenting on nutritional supplements at international conferences and private courses. RC has consulted with and represented companies that sell dietary supplements and serves in non-paying positions on the boards of supplement trade associations. Over the past 30 years, JS has received grants to investigate the efficacy and safety of dietary supplements, served as a paid consultant for the industry, and received honoraria for speaking at conferences and writing lay articles about sports nutrition ingredients and topics. RC is an equal partner of the law firm Collins Gann McCloskey and Barry PLLC. The remaining author declares that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision.
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Summary
Keywords
dietary supplements, creatine monohydrate, adolescent nutritional physiological phenomena, frail older adults, transition to adult care, public policy, nutritional epidemiology
Citation
Kreider RB, Jagim AR, Antonio J, Kalman DS, Kerksick CM, Stout JR, Wildman R, Collins R and Bonilla DA (2025) Creatine supplementation is safe, beneficial throughout the lifespan, and should not be restricted. Front. Nutr. 12:1578564. doi: 10.3389/fnut.2025.1578564
Received
17 February 2025
Accepted
20 March 2025
Published
04 April 2025
Volume
12 - 2025
Edited by
Terence Moriarty, University of Northern Iowa, United States
Reviewed by
Giannis Arnaoutis, Harokopio University, Greece
Updates
Copyright
© 2025 Kreider, Jagim, Antonio, Kalman, Kerksick, Stout, Wildman, Collins and Bonilla.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Richard B. Kreider rbkreider@tamu.edu
Disclaimer
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