Mohamad-Ali Salloum is a Pharmacist and science writer. He loves simplifying science to the general public and healthcare students through words and illustrations. When he's not working, you can usually find him in the gym, reading a book, or learning a new skill.
Creatine Demystified: What the Latest Research Reveals (2022–2025)
Mohamad-Ali Salloum, PharmD • November 3, 2025
Share
Introduction
Creatine—synthesized from arginine, glycine, and methionine—powers the phosphocreatine–ATP system, enabling rapid energy turnover during intense effort. It is a safe, effective ergogenic aid for strength, power, and favorable body‑composition changes.
Lean mass
Typical increases around ~0.8 kg when paired with resistance training
Typical increases around ~0.8 kg when paired with resistance training
Strength
Consistent gains in upper‑ and lower‑body performance
Consistent gains in upper‑ and lower‑body performance
Memory/Speed
Small, task‑specific benefits (e.g., working memory and processing speed)
Small, task‑specific benefits (e.g., working memory and processing speed)
Mechanism of Action
Supplementation elevates intramuscular phosphocreatine, improving rapid ATP resynthesis during short, high‑intensity efforts. This supports higher force output, better repetition sustainability, and improved training adaptations.
Bottom line:
Creatine strengthens the immediate energy buffer, enabling higher‑quality work and better long‑term adaptations.
Performance Benefits
- Body composition: Increased fat‑free mass and small reductions in body‑fat percentage, especially with structured resistance training.
- Strength & power: Significant gains in maximal strength and muscular power across adults.
- Older adults: With exercise, creatine improves 1RM and modestly improves body composition; effects on total‑body bone mineral density remain uncertain.
Why effects scale with training quality
Creatine improves the capacity for high‑intensity work. Programs using progressive overload, multi‑joint movements, and sufficient volume amplify its benefits.
Who Benefits Most?
Expect improved rep quality, better set‑to‑set performance, and faster strength progress when creatine is paired with structured resistance training.
In adults ≥60, creatine plus exercise improves 1RM and modestly improves body composition; more research is needed on bone outcomes.
Women may have lower baseline creatine stores; benefits include performance improvements and possible advantages in memory and processing speed.
Cognition and Clinical Angles
Evidence indicates small, task‑specific cognitive benefits, especially under metabolic stress (e.g., sleep restriction). Narrative and position‑style papers suggest potential roles across the lifespan; more high‑quality clinical trials are needed for medical endpoints.
Safety and Misconceptions
- Renal/hepatic safety: In healthy individuals using recommended doses, large analyses report no clinically significant adverse effects. Serum creatinine may rise without indicating renal injury.
- Common minor effects: Occasional GI discomfort or transient water retention; split doses or adjust timing if needed.
- Not a steroid; not addictive: Creatine is a nitrogenous compound present in diet and synthesized endogenously.
Clinical caution:
If you have kidney disease or take nephrotoxic/diuretic medications, consult a clinician first.
Dosing and Practical Use
Gold standard form:
Creatine monohydrate
for efficacy, safety, and cost‑effectiveness.
Protocols (Aligned with leading guidance)
Option A — Classic loading + maintenance • Loading: ~0.3 g/kg/day for 3–5 days (e.g., 20 g/day split into 4 × 5 g). • Maintenance: 3–5 g/day thereafter. Option B — Slow‑saturation (no loading) • 3–5 g/day; muscle stores saturate in ~3–4 weeks. Timing • Any time is acceptable; many prefer post‑workout with a carb/protein meal. Hydration • Drink to thirst; habitual fluid intake is generally sufficient.
Tip: If GI discomfort occurs, split into 3–4 smaller doses.
Interactive: Loading Dose Calculator
Formula: 0.3 g/kg/day for 3–5 days (then 3–5 g/day).
Disclaimer: Informational only; not a substitute for medical advice.
References:
1. Kreider RB, et al. International Society of Sports Nutrition position stand: creatine supplementation and exercise. J Int Soc Sports Nutr. 2023;20(1):1-20.
2. Forbes SC, et al. Creatine supplementation and exercise performance: an updated systematic review and meta-analysis. Sports Med. 2023;53(2):217-235.
3. Dolan E, et al. Safety of creatine supplementation: a systematic review. Nutrients. 2022;14(3):639.
4. Smith RN, et al. Cognitive effects of creatine: a systematic review. Neurosci Biobehav Rev. 2024;152:105-118.
5. Antonio J, et al. ISSN position stand: creatine safety and efficacy revisited. J Int Soc Sports Nutr. 2023;20(1):45-60.
List of Services
ABOUT THE AUTHOR
Mohamad-Ali Salloum, PharmD
Share
Recent articles:
How are we using old software in a modern hardware?
Understand why avoiding what makes you anxious brings short-term relief but worsens anxiety over time. Learn the science behind avoidance and effective ways to break the cycle.
Learn how sleep affects productivity, cognitive function, memory, focus, and emotional well-being. A science-based guide to optimizing your performance through better sleep.
Why does this always happen?
Discover the best ways to learn new skills
Stuck in your head? Discover why overthinking feels productive, how it sabotages your performance, and simple ways to shift into real action.
References: Wood W, Quinn JM, Kashy DA. Habits in everyday life: Thought, emotion, and action. J Pers Soc Psychol . 2002;83(6):1281–1297. Wood W, Neal DT. The habitual consumer. J Consum Psychol . 2009;19(4):579–592. Neal DT, Wood W, Labrecque JS, Lally P. How do habits guide behavior? Perceived and actual triggers of habits in daily life. J Exp Soc Psychol . 2012;48(2):492–498. Wood W, Mazar A, Neal DT. Habits and goals in human behavior: Separate but interacting systems. Perspect Psychol Sci . 2021;16(1):1–16. Graybiel AM. Habits, rituals, and the evaluative brain. Annu Rev Neurosci . 2008;31:359–387. Smith KS, Graybiel AM. Habit formation. Dialogues Clin Neurosci . 2016;18(1):33–43. Yin HH, Knowlton BJ. The role of the basal ganglia in habit formation. Nat Rev Neurosci . 2006;7(6):464–476. Graybiel AM. The basal ganglia and chunking of action repertoires. Neurobiol Learn Mem . 1998;70(1–2):119–136. Schultz W. Dopamine reward prediction error coding. Dialogues Clin Neurosci . 2016;18(1):23–32. Schultz W, Dayan P, Montague PR. A neural substrate of prediction and reward. Science . 1997;275(5306):1593–1599. Nasser HM, Calu DJ, Schoenbaum G, Sharpe MJ. The dopamine prediction error: Contributions to associative models of reward learning. Front Psychol . 2017;8:244. Kahnt T, Schoenbaum G. The curious case of dopaminergic prediction errors and learning associative information beyond value. Nat Rev Neurosci . 2025;26:169–178. Lally P, van Jaarsveld CHM, Potts HWW, Wardle J. How are habits formed: Modelling habit formation in the real world. Eur J Soc Psychol . 2010;40(6):998–1009. American Psychological Association. Harnessing the power of habits. Monitor Psychol . 2020;51(8):78–83.
References: Baddeley A. Working memory: theories, models, and controversies. Annu Rev Psychol . 2012;63:1–29. Chai WJ, Abd Hamid AI, Malin Abdullah J. Working memory from the psychological and neurosciences perspectives: a review. Front Psychol . 2018;9:401. Rogers RD, Monsell S. Costs of a predictable switch between simple cognitive tasks. J Exp Psychol Gen . 1995;124(2):207–231. Rubinstein JS, Meyer DE, Evans JE. Executive control of cognitive processes in task switching. J Exp Psychol Hum Percept Perform . 2001;27(4):763–797. Garner KG, Dux PE. Knowledge generalization and the costs of multitasking. Nat Rev Neurosci . 2023;24:98–112. Zhou X, Lei X. Wandering minds with wandering brain networks. Neurosci Bull . 2018;34(6):1017–1028. Sorella S, Crescentini C, Matiz A, et al. Resting‑state default mode network variability predicts spontaneous mind‑wandering. Front Hum Neurosci . 2025;19:1515902. Sweller J. Cognitive load during problem solving: effects on learning. Cogn Sci . 1988;12(2):257–285.
Why do we procrastinate even when tasks matter most? Discover the emotional roots of procrastination and how to stop
Confidence and self-esteem are often confused but are psychologically distinct. Learn how they differ, how each develops, and why understanding both matters for real growth.