Creatine Monohydrate
Creatine Monohydrate
TL;DR
The most studied sports supplement in existence, with a clean safety record across decades of trials. 3-5 g daily of creatine monohydrate increases muscle strength and power output by roughly 5-15%. Loading is optional. Kidney damage in healthy people is a myth.
Ideal For
- Anyone doing resistance training or high-intensity intermittent sport
- Vegetarians and vegans, who have lower baseline muscle stores
- Older adults aiming to preserve muscle mass and strength
- People training in sleep-deprived or high-stress periods
- Those looking for the highest evidence-to-cost ratio in supplements
Avoid If
- You have existing kidney disease — use only under medical supervision
- You have a scheduled kidney function blood test, unless you inform the clinician
- You are taking nephrotoxic medication without medical review
Frequently Asked Questions
Overview
Creatine is a compound synthesised from arginine, glycine and methionine, stored mainly in skeletal muscle as phosphocreatine. Its function is rapid ATP regeneration: during high-intensity effort, phosphocreatine donates a phosphate group to ADP, restoring ATP within seconds. Supplementation raises muscle phosphocreatine stores by 20-40%, extending the duration of maximal effort.
The evidence base is unusually deep. Hundreds of randomised trials and multiple meta-analyses show consistent gains in strength, power and lean mass when combined with resistance training — typically 5-15% above training alone. Effects are largest in activities lasting under 30 seconds and repeated with short rest.
Creatine monohydrate is the form to buy. Every alternative — hydrochloride, ethyl ester, buffered forms, liquid creatine — has been marketed on claims of superior absorption, and none has outperformed monohydrate in head-to-head trials. Monohydrate is also the cheapest by a wide margin.
Loading is optional. Twenty grams daily split into four doses for five to seven days saturates muscle faster, but 3-5 g daily reaches the same saturation in three to four weeks with less gastrointestinal upset.
The safety picture is reassuring. Trials lasting up to five years find no adverse effect on kidney function in healthy people. The persistent kidney myth arises from creatine raising serum creatinine — a breakdown product used to estimate kidney function — without any actual change in filtration. Tell your doctor you take creatine before a kidney blood test.
Cognitive effects are an active and promising area. Creatine appears to help most under metabolic stress: sleep deprivation, hypoxia, and in vegetarians, whose baseline stores are lower because dietary creatine comes from meat and fish. Higher doses, in the 10-20 g range, are used in cognitive and mood research.
How It Works
- Increases muscle phosphocreatine, enabling faster ATP resynthesis during maximal effort
- Buffers hydrogen ion accumulation, modestly delaying fatigue
- Increases intracellular water content, which acts as an anabolic signal
- Upregulates satellite cell activity and myogenic transcription factors
- Provides a phosphate energy buffer in brain tissue, relevant to cognitive effects
Quick Facts
- The most researched sports supplement, with hundreds of randomised trials
- 3-5 g daily of monohydrate is all that is needed
- Loading is optional; it only shortens time to saturation
- Monohydrate outperforms every "advanced" form on price and equals them on results
- It raises serum creatinine without harming kidneys — tell your doctor before testing
Benefits & Outcomes
Executive Function
Cheap, safe and well studied. One of the few supplements with real cognitive data.
ATP Production Enhancement
Creatine is the best-evidenced supplement for rapid ATP regeneration.
BDNF Enhancement
Creatine supports brain energetics but there is no good human BDNF evidence.
Creatine Phosphate Restoration
Creatine monohydrate is the definitive intervention here — the most robustly evidenced performance supplement available.
Muscle Strength & Physical Function
500+ RCTs: 5–15% strength and power improvement, effective across ages including older adults; cognitive benefits emerging.
Reaction Time Improvement
Creatine measurably improves reaction time under sleep deprivation and in vegetarians.
Sprint Performance
Creatine is the best-evidenced sprint supplement in existence.
Synaptic Plasticity
Creatine supports brain energy metabolism, with cognitive effects clearest under stress.
Learning Speed Increase
Creatine improves memory and processing under fatigue, with the largest gains in vegetarians and the sleep-deprived.
Heat Tolerance
Creatine expands total body water and may buffer core temperature rise, but it does not replace acclimation and can add 1-2 kg of mass.
Krebs Cycle Enhancement
Creatine supports cellular energy buffering upstream of oxidative metabolism and is the best-evidenced energy supplement overall.
Oxygen Utilization Improvement
Creatine improves repeated high-intensity work capacity, but does not raise VO2max and adds water weight that can slow endurance events.
Physical Stamina Increase
Creatine reliably improves repeated high-intensity efforts, though it does little for steady-state endurance.
Post-Workout Recovery
Creatine improves recovery between repeated efforts and supports glycogen replenishment.
Processing Speed Improvement
Creatine improves cognitive speed most in vegetarians and under sleep deprivation, and little in rested omnivores.
Protein Metabolism
Creatine improves training output, which indirectly improves how well dietary protein is used.
Pump Enhancement
Creatine increases intracellular water, producing genuine and lasting muscle fullness rather than a transient pump.
Enhanced Athletic Performance
If you do resistance or power training, creatine is the single highest-value supplement available.
Grip Strength Enhancement
Reliable strength gains when paired with actual grip training.
Increased Energy Production
Real cellular energy support with the deepest evidence base of any supplement.
Cognitive Function
Genuine nootropic potential in specific contexts; not a general IQ booster for well-rested meat-eaters.
Health Concerns Addressed
General Weakness
One of the best-evidenced supplements in existence — but only alongside training.
Depression
A reasonable, cheap, low-risk adjunct to standard treatment — particularly for women. Never a replacement for antidepressants or therapy.
Brain Fog
Worth trying at 5 g daily, and genuinely promising if you are sleep-deprived or vegetarian. Not a general nootropic.
Physical Weakness
Creatine is one of the most studied supplements in existence, with consistent evidence for modest strength and muscle gains in older adults — but only as a partner to resistance training, which does the real work against age-related weakness.
Traumatic Brain Injury
Mixed. Coherent bioenergetic rationale and one unreplicated positive paediatric trial.
Post-Concussion Syndrome
Small paediatric work suggested benefit for post-traumatic symptoms, but the evidence base has not been replicated in adults.
Stroke Recovery
Insufficient evidence in stroke, but mechanistically reasonable alongside resistance rehabilitation.
Muscle Weakness
Creatine paired with resistance training consistently increases strength and lean mass, including in older adults with sarcopenia.
Supporting Research41 studies
International Society of Sports Nutrition Position Stand: Safety and Efficacy of Creatine Supplementation
Kreider RB, Kalman DS, Antonio J +7 more
Creatine monohydrate is the most effective ergogenic nutritional supplement available for increasing high-intensity exercise capacity and lean mass.
Muscle creatine levels and sprint performance in young adult vegans and vegetarians after 7 days of creatine monohydrate supplementation
A seven-day CM supplementation in healthy vegans and vegetarians increased Cr and TCr whereas Phosphocreatine, peak and mean power output during repeated sprints were unchanged.
The effects of creatine supplementation on cognitive function in adults: a systematic review and meta-analysis
Xu C, et al.
Current evidence suggests that creatine monohydrate supplementation may confer beneficial effects on cognitive function in adults, particularly in the domains of memory, attention time, and information processing speed.
The CREST-E study of creatine for Huntington disease: A randomized controlled trial
Hersch SM, Schifitto G, Oakes D +4 more
Our data do not support the use of creatine treatment for delaying functional decline in early manifest HD.
Prevention of traumatic headache, dizziness and fatigue with creatine administration. A pilot study
Sakellaris G
Significant improvement was recorded in the categories of headache (p<0.001), dizziness (p=0.005) and fatigue (p<0.001).
Does creatine supplementation hinder exercise heat tolerance or hydration status? A systematic review with meta-analyses
Lopez RM, Casa DJ, McDermott BP +3 more
Does creatine supplementation hinder exercise heat tolerance or hydration status? A systematic review with meta-analyses
Sport supplementation in competitive swimmers: a systematic review with meta-analysis
Domínguez R, López-León I, Moreno-Lara J +1 more
Creatine supplementation demonstrated ergogenic benefits for competitive swimmers
Effects of Creatine Supplementation on Athletic Performance in Soccer Players: A Systematic Review and Meta-Analysis
Creatine improved repeated sprint and jump performance, tasks dependent on rapid ATP resynthesis.
Creatine supplementation for patients with COPD receiving pulmonary rehabilitation: a systematic review and meta-analysis
Al-Ghimlas F, Todd DC
There was no effect of creatine supplementation on exercise capacity (SMD -0.01, 95% CI: -0.42 to 0.22, n = 151)
Effects of creatine supplementation on memory in healthy individuals: a systematic review and meta-analysis of randomized controlled trials
Prokopidis K, et al
Creatine supplementation enhanced measures of memory performance in healthy individuals, especially in older adults (66-76 years).
Creatine for treating muscle disorders
Kley RA, et al
High quality evidence from RCTs shows that short- and medium-term creatine treatment increases muscle strength in muscular dystrophies.
Creatine in Health and Disease
Increasing creatine availability may enhance cellular metabolism and lessen injury severity when oxygen availability is compromised.
Creatine supplementation, sleep deprivation, cortisol, melatonin and behavior
McMorris T, et al.
During sleep deprivation with moderate-intensity exercise, creatine supplementation only affects performance of complex central executive tasks.
Randomized Controlled Trial of Dietary Creatine as an Adjunct Therapy to Physical Training in Chronic Obstructive Pulmonary Disease
Fuld JP
Creatine supplementation does not augment the substantial training effect of multidisciplinary pulmonary rehabilitation for patients with COPD.
Effects of glycerol and creatine hyperhydration on doping-relevant blood parameters
Polyviou TP, Easton C
Combined creatine and glycerol supplementation increased total body water compared with control
Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: a meta-analysis
Chilibeck PD, Kaviani M, Candow DG +1 more
Creatine plus resistance training produced significantly greater gains in lean tissue mass and strength than training alone.
Short-Term Creatine Supplementation and Repeated Sprint Ability - A Systematic Review and Meta-Analysis
Short-term creatine supplementation may increase mean power output during repeated sprint tests.
No additive effect of creatine, caffeine, and sodium bicarbonate on intense exercise performance in endurance-trained individuals
Kruse NT, et al
Mean power output during 6-min time trial was higher with caffeine ... whereas sodium bicarbonate (-1 W) and creatine (-6 W) had no effects
Effects of creatine supplementation on muscle strength gains-a meta-analysis and systematic review
Creatine combined with resistance training produced greater strength gains than training alone.
Creatine supplementation during pulmonary rehabilitation in chronic obstructive pulmonary disease
Fuld JP, Kilduff LP, Neder JA +3 more
No difference was found in whole body exercise performance between the groups
Creatine and glycerol hyperhydration in trained subjects before exercise in the heat
Easton C, Turner S, Pitsiladis YP
Both Cr/Pl and Cr/[Gly increased total body water]
Prevention of complications related to traumatic brain injury in children and adolescents with creatine administration: an open label randomized pilot study
Sakellaris G
Preliminary data suggest that the administration of creatine may be beneficial to patients with traumatic brain injury.
Neuroprotection and Therapeutic Implications of Creatine Supplementation for Brain Injury Complications
Creatine shows potential as a neuroprotective agent for complications of traumatic brain injury.
Can Creatine Combat the Mental Fatigue-associated Decrease in Visuomotor Skills?
Van Cutsem J, et al
Creatine supplementation improved physical (strength endurance) and prolonged cognitive (Stroop accuracy) performance, yet it did not combat MF-induced impairments.
Effect of creatine supplementation on body composition and performance: a meta-analysis
Branch JD
Creatine produced a significant positive effect size for lean body mass and short-duration, high-intensity performance.
Effects of Oral Creatine Supplementation on Power Output during Repeated Treadmill Sprinting
Creatine supplementation improved the mean power and speed in the second half of a repeated sprint running protocol.
Meta-Analysis Examining the Importance of Creatine Ingestion Strategies on Lean Tissue Mass and Strength in Older Adults
Forbes SC, Candow DG, Ostojic SM +2 more
Creatine supplementation combined with resistance training exercise produces greater gains in lean tissue mass and muscle strength than resistance training alone in older adults.
Effects of creatine supplementation on muscle cell volumisation and intracellular water: a randomized controlled trial
Powers ME, Arnold BL, Weltman AL +3 more
Creatine increased total and intracellular body water alongside body mass, consistent with muscle cell volumisation
The effects of creatine supplementation on cognitive performance-a randomised controlled study
Creatine supplementation improved memory and processing speed in a randomized controlled trial.
Effects of creatine supplementation on cognitive function of healthy individuals: A systematic review of randomized controlled trials
Avgerinos KI, Spyrou N, Bougioukas KI +1 more
Creatine improved short-term memory and intelligence/reasoning in healthy adults.
The influence of creatine supplementation on the cognitive functioning of vegetarians and omnivores
In vegetarians rather than in those who consume meat, creatine supplementation resulted in better memory.
Creatine supplementation and cognitive-motor performance: a systematic review
Avgerinos KI, Spyrou N, Bougioukas KI +1 more
Creatine showed no consistent benefit for reaction time or executive function
The effects of creatine supplementation on cognitive performance — a randomised controlled study
Sandkühler JF, Kersting X, Faust A +7 more
Creatine produced no statistically significant improvement in the primary cognitive outcomes compared with placebo.
Creatine supplementation decreases oxidative DNA damage and lipid peroxidation induced by a single bout of resistance exercise
Creatine supplementation decreases oxidative DNA damage and lipid peroxidation induced by a single bout of resistance exercise.
Creatine supplementation and cognitive performance: a systematic review and meta-analysis
Avgerinos KI, Spyrou N, Bougioukas KI +1 more
Creatine improved short-term memory and reasoning, with the largest effects under sleep deprivation or metabolic stress
A randomized, double-blind placebo-controlled trial of oral creatine monohydrate augmentation for enhanced response to a selective serotonin reuptake inhibitor in women with major depressive disorder
Lyoo IK, Yoon S, Kim TS +5 more
The creatine augmentation group showed significantly greater improvement in depression scores and higher remission rates than placebo.
Creatine supplementation and mental fatigue and motivation during cognitive demand: a randomized trial
Van Cutsem J, Roelands B, Pluym B +3 more
Creatine did not significantly reduce subjective mental fatigue or improve motivation ratings
Creatine Supplementation and Brain Health
Avgerinos KI, Spyrou N, Bougioukas KI +1 more
Creatine supplementation and brain health.
Oral creatine monohydrate supplementation improves brain performance: a double-blind, placebo-controlled, cross-over trial
Rae CD, Digney AL, McEwan SR +1 more
Effects of creatine supplementation on cognitive function.
Long-term creatine supplementation does not significantly affect clinical markers of health in athletes
Kreider RB, Melton C, Rasmussen CJ +5 more
No clinically significant differences in renal, hepatic or muscle markers between long-term creatine users and non-users.
Creatine in Health and Disease
Wallimann T, Tokarska-Schlattner M, Schlattner U
Creatine in health and disease.
Safety Information
Potential Side Effects
Very safe and well-studied. May cause mild water retention. Stay hydrated. Loading phase not necessary but can be used.
Dosage Guidelines
Dosage Used in Studies
Consult healthcare provider
Medical Disclaimer
The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.
Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.