Creatine for Women, Teens & Older Adults

By Sarina Carson, Senior NPD Technologist, NZCS (Food Science), FNZIFST · Published 9 October 2026 · 9 min read

How creatine advice changes across life stages

Creatine is often discussed as if one answer applies to everyone, but it does not. The biological role of creatine is broadly shared, but the depth of research, practical goals and level of caution differ across adult women, older adults, teenage athletes, and people who are pregnant or breastfeeding.

Creatine and phosphocreatine help regenerate adenosine triphosphate, or ATP, during brief, high-intensity activity. Creatine monohydrate supplementation can increase muscle creatine stores and may support repeated high-intensity performance in suitable adult athletes. The Australian Institute of Sport classifies creatine as a Group A performance supplement for use in specific sporting situations under evidence-based protocols. ^1,2

Evidence from studies in adults cannot be assumed to apply to teens or to people who are pregnant or breastfeeding, as these populations have not been studied to the same extent. This article therefore distinguishes established adult guidance from emerging or incomplete evidence and provides appropriately cautious, population-specific guidance.

Does creatine work differently for women than men?

Creatine supports the same phosphocreatine energy pathway in adult women and men. It is therefore inaccurate to describe creatine as a "men's supplement". Research focused specifically on women is smaller than the broader creatine literature. Reviews report potential support for strength and exercise performance in pre-menopausal women and possible muscle-function benefits in post-menopausal women, particularly when supplementation is combined with resistance training. ^2,3

This does not mean every woman will experience the same result. Training status, diet, program design, adherence, hormonal status, and baseline muscle creatine can influence outcomes. Female-specific evidence also remains less extensive than the historical evidence base in men. The useful conclusion is not that creatine produces a uniquely female outcome, but that adult women should not be excluded from an evidence-led conversation about creatine.

When consumed as part of a healthy, varied diet with an appropriate training or exercise program.

What can women realistically expect from creatine?

For an adult woman completing resistance training or repeated high-intensity exercise, creatine may support the capacity to perform that training. The program remains the main stimulus for adaptation. Creatine is not a substitute for progressive training, sufficient energy and protein, sleep, or recovery planning. ^1,2,3

A practical way to frame the evidence is to separate the supplement from the outcome. Creatine can increase available muscle creatine and phosphocreatine. Whether that translates into a noticeable change in training performance or body composition depends on both the training context and the individual. ^1,2

Will creatine make women "bulky"?

Creatine does not independently determine a body type. Visible muscle growth develops through repeated training stimulus and is influenced by program volume, nutrition, genetics, and time. Creatine may support training capacity, but it does not create a predetermined physique without the training and nutritional conditions that drive adaptation. ^2,3

Some people experience an increase in body mass after starting creatine, partly due to an increase in water stored within muscle as creatine stores rise. This is not the same as creatine automatically producing a large increase in muscle size or a "bulky" physique. ^1,2

What creatine research says about older adults

Research in older adults has most consistently examined creatine alongside resistance training. A 2017 meta-analysis of 22 studies involving 721 participants found that creatine plus resistance training produced greater gains in lean tissue mass and upper- and lower-body strength than resistance training with placebo. Mean ages across the studies ranged from 57 to 70 years, and programs ran for 7 to 52 weeks. ⁴

A 2025 meta-analysis of 20 articles involving 1,093 participants also reported improvements in one-repetition maximum strength and body-fat percentage when creatine was combined with exercise training, while reporting no significant effect on total-body bone mineral density. ⁵ These findings support a measured conclusion: creatine may enhance some adaptations to structured exercise in older adults, but it should not be presented as preventing ageing, frailty or disease.

Why resistance training remains central for older adults

The strongest practical case is for creatine as an addition to resistance training, not as a replacement for it. A supplement cannot provide the progressive loading, movement practice and functional challenge created by a well-designed exercise program.

Older adults also have more varied health circumstances than a typical sports-nutrition study population. Medication use, kidney or liver conditions, mobility limitations and nutritional status may change what is appropriate. An older adult with a medical condition, or anyone taking medication, should seek individual advice from their GP, pharmacist or accredited practising dietitian before use.

Does the evidence support "healthy ageing" claims?

It is reasonable to discuss strength, lean tissue, and functional training outcomes measured in older-adult research. It is not reasonable to present those findings as evidence that creatine prevents age-related decline. Evidence on cognition and bone outcomes remains developing and is not a basis for therapeutic claims in this article. ^4,5

What guidance says about creatine for teens and young athletes

The evidence base for healthy adolescents is much smaller than the adult evidence base. A 2021 review reported that adolescent exercise studies were limited in scope and commonly described performance outcomes without reported adverse events, while emphasising that much less is known in children and adolescents than in adults. ⁶

A 2023 literature review identified 13 eligible publications involving 268 participants, with mean ages from 11.5 to 18.2 years. Most participants were soccer players or swimmers, the overall study quality was poor, and no included study was designed to assess safety. ⁷ A lack of reported adverse events in small or short-term studies is not equivalent to comprehensive long-term safety evidence.

What should parents and teenage athletes do?

The responsible starting point is a conversation involving the young athlete, a parent or guardian, and an appropriately qualified health or sports nutrition professional such as a GP, registered or accredited sports dietitian or sports physician. That discussion should consider age, maturity, training demands, diet, medical history, medications, the reason for creatine supplementation, and product quality.

Young athletes should not treat creatine as a shortcut for getting the fundamentals right including adequate nutrition, sleep, appropriate coaching and a suitable training program. This article does not provide a dose for minors and does not recommend that a teenager starts creatine supplementation independently.

What is known about creatine during pregnancy and breastfeeding?

There is insufficient dedicated human supplementation evidence to support a general recommendation about the safety of creatine supplementation during pregnancy or breastfeeding. Research has examined creatine metabolism during pregnancy, and animal or experimental work has explored potential clinical applications. However, these findings do not demonstrate that routine creatine supplementation is safe or beneficial during pregnancy or breastfeeding. ^8,9,10

A Cochrane review found no completed or ongoing randomised controlled trials assessing creatine given during pregnancy for fetal neuroprotection. ⁹ A 2024 prospective cohort study described creatine metabolism across pregnancy in 282 participants, but it was observational and did not test the safety or efficacy of creatine supplementation. ¹⁰

Should someone start or continue creatine during pregnancy or breastfeeding?

A person who is pregnant, planning a pregnancy or breastfeeding should speak with their doctor, obstetric care provider or appropriately qualified healthcare professional before starting, stopping or continuing creatine. The absence of robust human supplementation trials should not be presented as proof of harm, but neither does it support a general assurance of safety.

This section deliberately does not repurpose healthy-adult safety evidence. Pregnancy and breastfeeding involve distinct physiological and clinical considerations, and evidence specifically examining creatine supplementation during pregnancy and breastfeeding is particularly limited.

How to make a population-appropriate creatine decision

For healthy adults, a sound decision starts with the training goal, the evidence for the chosen supplement form, and whether supplementation fits the broader nutrition plan. The Australian Institute of Sport recommends involving a sports dietitian when considering supplements and notes that most safety and efficacy evidence concerns creatine monohydrate. ¹

For older adults, the decision should also account for health status, exercise experience, and medication use. For teenagers, a parent or guardian and qualified healthcare professional should be involved. During pregnancy and breastfeeding, individual medical advice should be sought because dedicated human supplementation evidence is insufficient to support a general safety recommendation.

Key takeaways about creatine across life stages

• Creatine uses the same core energy pathway in adult women and men. ^2,3
• Creatine does not automatically produce a "bulky" physique.
• Benefits in older adults have been most consistently studied when creatine is combined with resistance training. ^4,5
• Evidence among teenage athletes is limited and does not establish comprehensive long-term safety. ^6,7
• People who are pregnant or breastfeeding should seek individual medical advice because dedicated human supplementation evidence is insufficient. ^8,9,10
• Supplements should complement, not replace, a healthy, varied diet and an appropriate training program. ¹

Frequently asked questions about creatine for women and life stages

Does creatine work differently for women?

Creatine supports the same core phosphocreatine energy system in adult women and men. Female-specific research is more limited, but creatine may support strength, exercise performance and adaptations to training in some women. Individual outcomes still depend on factors such as training, diet, and baseline creatine status. ^2,3

Will creatine make women "bulky"?

No supplement can determine a body type on its own. Visible muscle growth is shaped by training volume, nutrition, genetics, and time. Creatine may support training capacity and may increase water stored within muscle, but neither effect is the same as automatically creating a large or "bulky" physique. ^1,2,3

Is creatine safe for teenage athletes?

There is not enough broad, long-term evidence to give every teenage athlete a blanket yes. The available adolescent studies are limited and were not designed to establish comprehensive safety. The young athlete and their parent or guardian should discuss the individual athlete's circumstances with a GP, registered or accredited sports dietitian or sports physician before considering supplementation. ^6,7

Can I take creatine while pregnant or breastfeeding?

Dedicated human supplementation evidence is insufficient to establish the safety of routine creatine use during pregnancy or breastfeeding. Observational pregnancy research and experimental work do not replace controlled safety trials. Speak with your doctor or maternity care provider before starting, stopping or continuing creatine during pregnancy or while breastfeeding. ^8,9,10

References

1. Australian Institute of Sport. (n.d.). Creatine. Australian Sports Commission. Australian Sports Commission creatine guidance.
2. Kreider, R. B., Kalman, D. S., Antonio, J., et al. (2017). International Society of Sports Nutrition position stand: Safety and efficacy of creatine supplementation in exercise, sport, and medicine. Journal of the International Society of Sports Nutrition, 14, 18. DOI record.
3. Smith-Ryan, A. E., Cabre, H. E., Eckerson, J. M., & Candow, D. G. (2021). Creatine supplementation in women's health: A lifespan perspective. Nutrients, 13(3), 877. DOI record.
4. Chilibeck, P. D., Kaviani, M., Candow, D. G., & Zello, G. A. (2017). Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: A meta-analysis. Open Access Journal of Sports Medicine, 8, 213–226. DOI record.
5. Sharifian, G., Aseminia, P., Heidary, D., & Esformes, J. I. (2025). Impact of creatine supplementation and exercise training in older adults: A systematic review and meta-analysis. European Review of Aging and Physical Activity, 22(1), Article 17. DOI record.
6. Jagim, A. R., & Kerksick, C. M. (2021). Creatine supplementation in children and adolescents. Nutrients, 13(2), 664. DOI record.
7. Metzger, G. A., Minneci, P. M., Gehred, A., Day, A., & Klingele, K. E. (2023). Creatine supplementation in the pediatric and adolescent athlete: A literature review. Journal of Orthopaedics, 38, 73–78. DOI record.
8. Dickinson, H., Ellery, S., Ireland, Z., LaRosa, D., Snow, R., & Walker, D. W. (2014). Creatine supplementation during pregnancy: Summary of experimental studies suggesting a treatment to improve fetal and neonatal morbidity and reduce mortality in high-risk human pregnancy. BMC Pregnancy and Childbirth, 14, 150. DOI record.
9. Dickinson, H., Bain, E., Wilkinson, D., Middleton, P., Crowther, C. A., & Walker, D. W. (2014). Creatine for women in pregnancy for neuroprotection of the fetus. Cochrane Database of Systematic Reviews, Issue 12, CD010846. DOI record.
10. de Guingand, D. L., Palmer, K. R., Callahan, D. L., Snow, R. J., Davies-Tuck, M. L., & Ellery, S. J. (2024). Creatine and pregnancy outcomes: A prospective cohort study of creatine metabolism in low-risk pregnant females. The American Journal of Clinical Nutrition, 119(3), 838–849. DOI record.

The information in this article is for educational purposes only and is not intended as medical advice. Always read the label and follow the directions for use. If symptoms persist, consult your healthcare professional. Musashi products are formulated for healthy adults; consult a healthcare professional before using if you have a pre-existing medical condition, are pregnant or breastfeeding, or are taking medication.