Kinetic

Creatine monohydrate

Creatine monohydrate is one of the most studied dietary supplements for adults who resistance train or seek cognitive support. Research links it to improvements in muscle strength, lean mass, recovery, and aspects of brain performance. This guide summarizes findings from peer-reviewed literature for informational purposes only and is not medical advice.

Drafted 2026-10-23, approved 2026-10-23. Amounts below are what studies used, not a dose to take.

What it is

Creatine monohydrate is a naturally occurring compound that plays a central role in cellular energy homeostasis, acting as a temporal and spatial buffer for ATP and ADP in both cytosolic and mitochondrial pools (PMID: 14561278). It is found in food and synthesized in the body, and is also widely used as a dietary supplement by athletes and those interested in cognitive performance.

What the research shows

  • Creatine monohydrate supplementation combined with resistance training is associated with improvements in lean body mass, regional muscle size, upper- and lower-body muscle strength, and functional ability in older adults. (PMID 39509039)
  • Creatine supplementation during eight weeks of progressive resistance training was associated with significantly greater strength gains versus placebo as early as two weeks into training for three of six exercises tested. (PMID 29722252)
  • Creatine monohydrate supplementation was associated with significantly quicker recovery of maximal voluntary contraction following eccentric exercise-induced muscle damage compared to placebo. (PMID 40507040)
  • Oral creatine supplementation was associated with significant positive effects on working memory and intelligence test scores in young adult vegetarian subjects. (PMID 14561278)
  • Creatine monohydrate supplementation added to cognitive-behavioural therapy was associated with significantly greater reductions in depression scores at eight weeks compared to placebo plus CBT. (PMID 39488067)
  • A systematic review and meta-analysis found no significant differences in total adverse events, gastrointestinal events, or weight gain in females supplementing with creatine monohydrate versus placebo. (PMID 32549301)
  • A systematic review and meta-analysis found that creatine monohydrate supplementation had no clear beneficial effect on endurance performance in trained populations, making its role in aerobic activities still controversial. (PMID 36877404)
  • Creatine monohydrate supplementation is associated with some anti-sarcopenic benefits for older adults, and there is emerging evidence it may support aspects of cognitive function, though evidence for bone mass improvements is considered more limited. (PMID 39509039)
  • Creatine monohydrate loading was studied in physically active men for effects on sleep metrics, cognitive function, and recovery alongside physical performance outcomes. (PMID 41470776)
  • Creatine monohydrate loading was studied in active women across the menstrual cycle and was associated with a significant phase-by-supplement interaction for fatigue index during repeated sprint performance. (PMID 37630756)
  • Accumulating research shows creatine monohydrate, primarily when combined with exercise training, is associated with beneficial effects on glucose kinetics, cognition, and memory in older adults. (PMID 40673730)

Amounts used in studies

  • 5 g per day for six weeks was the dose studied in young adult vegetarians examining working memory and intelligence test performance. (PMID 14561278)
  • 0.07 g per kg of body weight per day for eight weeks was the amount studied in young males during progressive resistance training examining strength and muscle damage markers. (PMID 29722252)
  • 20 g per day divided into 4 doses of 5 g was the loading amount studied in active women across the menstrual cycle for recovery and repeated sprint outcomes. (PMID 37630756)
  • 20 g per day for seven days was the loading amount studied in physically active men examining sleep metrics, cognitive function, and recovery. (PMID 41470776)
  • 33 days of supplementation with creatine monohydrate was the duration studied in a double-blind trial examining recovery from eccentric exercise-induced muscle damage across sexes and age groups. (PMID 40507040)
  • An 8-week supplementation period was studied in adults with depression receiving creatine monohydrate as an add-on to cognitive-behavioural therapy. (PMID 39488067)

These are amounts reported in the cited studies. They are not a recommendation.

Side effects and interactions

  • Creatine monohydrate has been studied as an adjunct to cognitive-behavioural therapy in depression; individuals on antidepressants or psychiatric medications should consult a clinician before combining (PMID: 39488067).
  • Creatine monohydrate affects cellular energy metabolism involving ATP; those taking medications that influence kidney or liver function should discuss use with a healthcare provider, as these organs are involved in creatine metabolism.
  • No significant interactions with common nootropics have been studied in the papers reviewed here; stacking with stimulants or other ergogenics has not been evaluated in this literature set.
  • Weight gain associated with creatine supplementation, likely from water retention in muscle, was not statistically significant in female populations studied but should be considered by those sensitive to body composition changes (PMID: 32549301).

Who should check with a clinician

  • Adults with pre-existing kidney or liver conditions, given creatine's metabolic pathway through these organs.
  • Individuals currently taking prescription antidepressants or psychiatric medications, as creatine has been studied as an adjunct to depression therapy (PMID: 39488067).
  • Older adults with sarcopenia, osteoporosis, or metabolic disorders, for whom a clinician should guide any supplementation program (PMID: 40673730).
  • Pregnant or breastfeeding individuals, as this population was not represented in the reviewed literature.
  • Anyone with a history of neuromuscular disorders, given that creatine has been studied in clinical neuromuscular populations (PMID: 40673730).

How to choose a product

  • Look for products labeled creatine monohydrate specifically, as this is the form studied in the research reviewed here.
  • Third-party tested products (e.g., NSF Certified for Sport, Informed Sport) reduce the risk of contaminants or label inaccuracies not covered in the studies reviewed.
  • Micronized creatine monohydrate is the same molecule with smaller particle size for easier mixing; the research base applies to standard monohydrate.
  • Avoid proprietary blends that obscure the actual amount of creatine per serving, since study amounts are specific to known doses (PMID: 29722252, PMID: 14561278).
  • Unflavored powder allows flexible use and avoids added sugars or artificial ingredients not present in the studied formulations.

FAQ

Does creatine monohydrate only benefit physical performance?

No. Beyond muscle and strength outcomes, creatine supplementation has been studied in the context of working memory, intelligence test performance (PMID: 14561278), and mood-related outcomes as an adjunct to therapy (PMID: 39488067), making it relevant to those interested in cognitive support as well.

Is creatine monohydrate studied in women as well as men?

Yes. A systematic review found no significant differences in adverse events or weight gain in females versus placebo (PMID: 32549301), and loading protocols have been studied in active women across the menstrual cycle for recovery and sprint performance (PMID: 37630756).

How quickly might strength benefits appear?

In one eight-week resistance training study, the creatine group showed significantly greater strength than placebo in three of six exercises after just two weeks of supplementation (PMID: 29722252).

Does creatine monohydrate help with endurance exercise?

A systematic review and meta-analysis found the evidence for creatine monohydrate improving endurance performance in trained populations to be inconclusive, and its role in aerobic activities remains controversial (PMID: 36877404).

Is creatine monohydrate relevant for older adults?

Research reviewed in narrative and systematic form indicates that creatine monohydrate combined with exercise is associated with improvements in lean mass, muscle strength, functional ability, and aspects of cognition in older adults, with potential relevance to age-related muscle loss (PMID: 40673730, PMID: 39509039).

Does creatine supplementation damage muscles?

In an eight-week resistance training study, creatine supplementation did not reduce markers of muscle damage such as creatine kinase and lactate dehydrogenase compared to placebo (PMID: 29722252). A separate trial found creatine was associated with faster recovery of maximal voluntary contraction after eccentric exercise (PMID: 40507040).

References

  • PMID 40673730: Creatine monohydrate supplementation for older adults and clinical populations.
  • PMID 39509039: Effects of Creatine Monohydrate Supplementation on Muscle, Bone and Brain- Hope or Hype for Older Adults?
  • PMID 36877404: Effects of Creatine Monohydrate on Endurance Performance in a Trained Population: A Systematic Review and Meta-analysis.
  • PMID 29722252: Creatine monohydrate supplementation during eight weeks of progressive resistance training increases strength in as little as two weeks without reducing markers of muscle damage.
  • PMID 40507040: The Effects of Creatine Monohydrate Supplementation on Recovery from Eccentric Exercise-Induced Muscle Damage: A Double-Blind, Randomized, Placebo-Controlled Trial Considering Sex and Age Differences.
  • PMID 14561278: Oral creatine monohydrate supplementation improves brain performance: a double-blind, placebo-controlled, cross-over trial.
  • PMID 32549301: Risk of Adverse Outcomes in Females Taking Oral Creatine Monohydrate: A Systematic Review and Meta-Analysis.
  • PMID 39488067: Efficacy and safety profile of oral creatine monohydrate in add-on to cognitive-behavioural therapy in depression: An 8-week pilot, double-blind, randomised, placebo-controlled feasibility and exploratory trial in an under-resourced area.
  • PMID 37630756: The Effects of Creatine Monohydrate Loading on Exercise Recovery in Active Women throughout the Menstrual Cycle.
  • PMID 41470776: Effects of Creatine Monohydrate Loading on Sleep Metrics, Physical Performance, Cognitive Function, and Recovery in Physically Active Men: A Randomized, Double-Blind, Placebo-Controlled, Crossover Trial.

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This page is educational. It does not recommend a compound or a dose, and it is not medical advice.