Creatine monohydrate is the most extensively studied nutritional compound in the world. Research that began with sports performance now spans muscle, bone, cellular energy and mitochondrial function, women's health, cognitive function and beyond!

This science blog reviews creatine's physiological mechanisms and explains how nutritional demands increase with age. We examine current clinical evidence across those areas and female physiology—focusing primarily on where a daily 5g dose has shown an effect. This extensive review oversees the research CreavitalisⓇ Creatine have particularly also undertaken.

Creatine in the body

Creatine is naturally synthesized in the liver, kidneys, and pancreas, as well as obtained through specific dietary sources. It serves a critical role in cellular bioenergetics (ie cellular respiration and energy metabolism) by donating phosphate groups within the phosphocreatine system, enabling the rapid regeneration of adenosine triphosphate (ATP)—the body's main energy currency.

This process occurs predominantly in tissues with high energy demands, including skeletal muscle, brain tissue, and the heart. Creatine differs from creatinine, a metabolic breakdown product excreted by the kidneys that serves as a renal biomarker without contributing to energy metabolism.

Where it's stored

Approximately 95% of body creatine resides in skeletal muscle, with remaining amounts stored in the brain, heart, and retina. Roughly two-thirds of intracellular creatine is stored as high-energy phosphocreatine.

What it does: The phosphocreatine system

Cells rely on ATP for energy, but muscle ATP depletes within seconds during high-intensity exertion. Via creatine kinase, phosphocreatine rapidly transfers a phosphate group to ADP, regenerating ATP instantly as the body's primary immediate energy buffer.

Why we need a steady supply

Daily cellular turnover converts 1–2% of creatine into creatinine (~2g/day for an average adult). Endogenous production accounts for ~1g daily, while exogenous intake (red meat and fish) provides the remainder. Consequently, vegetarians, vegans, older adults, women and athletes face higher risk of lower creatine stores.

Why demands increase with age

Starting at age 30, muscle mass and strength decline by 1–2% annually, accelerating to 3% yearly after age 60 (up to 8-10% loss per decade). Reduced dietary protein intake in older populations lowers natural creatine consumption, making supplementation an effective dietary strategy for healthy ageing.

Why Creavitalis®?

We chose Creavitalis® because its manufacturer, Alzchem, has the strongest quality and research track records in the industry:

• Made in Germany: Sustainably produced for over 30 years.

• The research standard: Widely used in scientific studies and clinical trials. Creavitalis® is the sister brand of Creapure® .

• Animal-free: Suitable for vegetarians and vegans.

• Highly micronised: Offers optimal bioavailability and mixes easily.

• Exceptional purity and traceability: 99.9% pure creatine monohydrate, third-party tested.

1. Creatine, muscle mass and longevity

The strongest evidence for creatine in healthy ageing shows that when combined with resistance training, it helps older adults, particularly women, build lean mass and strength than training alone.

Figure 1. Conceptual overview of the domains commonly linked to creatine monohydrate in the healthy-aging conversation, including female health, energy, recovery, clinical safety, male fertility, anti-fatigue symptoms, cognitive function, and cardiovascular health[*1].

In older adults, the strongest evidence remains in muscle strength, lean mass, exercise capacity, recovery, and tolerance and safety, particularly when creatine is paired with resistance training. 

Reference: :(Bonilla,D.A. et al., (2024) Front. Physiol.15 :149655.


What the research shows:

• Chilibeck et al. (2017) (Meta-analysis): Supported greater gains in lean mass and upper and lower-body strength compared to placebo across 721 older adults[*2].
  
  

• Forbes, S.C et al. (2021) (Meta-analysis of 20 RCTs): Consistently increased lean mass and strength across daily and workout-day dosing protocols in adults (over the age of 50), showing consistent efficacy with a 5g dose[*3].
  
  

• dos Santos, et al. (2021) (Meta analysis of 10 RCTs: Improved muscle strength and mass in older women alongside resistance training[*4].
  
  

• Liu, s.et al. (2025) (systematic review and meta-analysis) : Confirmed muscular strength and lean tissue mass gains with consistent supplementation over 32 weeks[*5].

In clinical practice, strength gains translate into fewer falls (a 5–8% strength gain lowers fall risk by ~20%), better mobility, and greater independence.


2. Physical performance and long-term safety

Taking  3g-5g of creatine monohydrate supports physical performance.

• Female Athletes: A 10-week trial showed collegiate female beach volleyball players taking 5g of CreavitalisⓇ Creatine daily jumped higher, changed direction faster, and maintained healthier body composition[*6].
  

Illustration obtained from Pereira, et al. (2026)  https://www.mdpi.com/2411-5142/11/1/105

• Long-term Safety: A 32-week study in female football players using Creavitalis® Creatine showed an effect on physical performance and more importantly was well tolerated, when kept at the low 3-5 g dose. It  showed no harmful effects on kidney or liver function[*7].

3. Creatine and women’s health across the lifespan

Women start with 70–80% lower natural creatine stores than men and consume less in their diets. A 2025 review by Smith-Ryan and colleagues highlights creatine's supportive role in muscle, bone, mood, and brain energy from menstruation through menopause[*8].

It is also thought that Creatine stores vary throughout the menstrual cycle- which could explain performance and energy levels throughout the month.


[Figure: Smith-Ryan et al. (2021): a theoretical model of creatine kinase and menstrual cycle hormones[*9].]

The researchers describe this as a theoretical model: it shows that creatine metabolism is likely to vary across the cycle, but exactly how much stores change at each phase still needs to be measured directly in women.

In a 2-year trial, postmenopausal women taking creatine maintained stronger hip bone structure and walked faster[*10].

4. Cognitive function and brain health

Creatine boosts the brain's energy reserves under stress. In a trial following 21 hours without sleep, Creavitalis® Creatine reduced mental performance decline, providing up to 12% better processing speed, reasoning, and alertness (with women benefiting notably)[*12-13].

5. Energy at a cellular level and fatigue support

Phosphocreatine rapidly hands phosphate back to ADP to rebuild ATP, serving as a rapid backup battery. In muscle, this aids recovery and performance; in the brain, it sustains focus during fatigue. Emerging research also explores its potential role in easing post-viral fatigue[*14].

References:

1) Bonilla, D.A. et al., (2024) The power of creatine plus resistance training for healthy aging: enhancing physical vitality and cognitive function.Front. Physiol.15 :149655. https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2024.1496544/full

2) Chilibeck PD, et al. (2017)  Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: a meta-analysis. Open Access J Sports Med;8:213-226.
https://pubmed.ncbi.nlm.nih.gov/29138605/

3) Forbes SC. et al. (2021) Meta-Analysis Examining the Importance of Creatine Ingestion Strategies on Lean Tissue Mass and Strength in Older Adults. Nutrients;13(6):1912.https://pmc.ncbi.nlm.nih.gov/articles/PMC8229907/

4) Dos Santos EEP., et al. (2021) Efficacy of Creatine Supplementation Combined with Resistance Training on Muscle Strength and Muscle Mass in Older Females: A Systematic Review and Meta-Analysis. Nutrients;13(11):3757.

https://pmc.ncbi.nlm.nih.gov/articles/PMC8619193/

5) Liu S. et al.(2025) The impact of creatine supplementation associated with resistance training on muscular strength and lean tissue mass in the aged: a systematic review and meta-analysis. Eur Rev Aging Phys Act;22(1):26.
https://pmc.ncbi.nlm.nih.gov/articles/PMC12752335/

6) Pereira, F. et al. (2026) Effects of Creatine Monohydrate Gummies on Performance and Body Composition in Female Beach Volleyball Athletes. J. Funct. Morphol. Kinesiol, 11, 105. https://doi.org/10.3390/jfmk11010105

7) Garcia, M.P et al. (2025) Safety of long-term creatine supplementation in women’s football players: a real world in season study. Journal of the international Society of Sports Nutrition.22 (S1): 1-9
https://www.tandfonline.com/doi/full/10.1080/15502783.2025.2591782

Correction. J Int Soc Sports Nutr. (2026) Dec 31;23(1):2607167. doi: 10.1080/15502783.2025.2607167. Epub 2025 Dec 27. Erratum for: J Int Soc Sports Nutr. 2025 Sep 30;22(sup1):2591782.
https://www.tandfonline.com/doi/full/10.1080/15502783.2025.2591782

8) Smith-Ryan, A.E., DelBiondo, G.M., Brown, A.F. et al (2025) Creatine in women’s health: bridging the gap from menstruation through pregnancy to menopause. Journal of the International Society of Sports Nutrition, 22(1) :2502094. https://pubmed.ncbi.nlm.nih.gov/40371844/

9) Smith-Ryan AE, Cabre HE, Eckerson JM, Candow DG. (2021) Creatine Supplementation in Women's Health: A Lifespan Perspective. Nutrients ;13(3):877.https://pmc.ncbi.nlm.nih.gov/articles/PMC7998865/

10) Chilibeck, PD. et al.(2023) A 2 year RCT on Creatine supplementation during exercise for postmenopausal women; Medicine  and Science in Sports and Exercise; 55 (10):1750-1760.. https://pmc.ncbi.nlm.nih.gov/articles/PMC10487398/

11) Chilibeck PD et al.(2021) Effects of Creatine and Resistance Training on Bone Health in Postmenopausal Women; Medicine & Science in Sports & Exercise,
https://pmc.ncbi.nlm.nih.gov/articles/PMC8619193/

12) Gordji-Nejad, A., Matusch, A., Kleedörfer, S. et al. (2024) Single dose creatine improves cognitive performance and induces changes in cerebral high energy phosphates during sleep deprivation. Sci Rep 14, 4937.
https://www.mdpi.com/2072-6643/18/8/1192

13) Additional resources: Ground breaking Creatine research: https://creatineforhealth.com/

14) Ostojic, S. M., Candow, D. G., & Tarnopolsky, M. A. (2025). Creatine and post-viral fatigue syndrome: an update. Journal of the International Society of Sports Nutrition, 22: (sup1).
https://www.tandfonline.com/doi/full/10.1080/15502783.2025.2517278#d1e290