When to Take Creatine: Before or After a Workout?

Take creatine at whatever time of day you will remember it, every day: long-term trials found similar gains in muscle and strength whether it was taken before or after training¹. Consistent daily intake is likely to matter more than the clock¹.

If you want a tiebreaker, two small trials hinted at slightly larger lean-mass gains when creatine was taken just after training^{2, 3}, but neither found a significant difference between after and before⁴. Food is optional: creatine works with or without it¹.

The best time is a time you can repeat daily, because creatine works by slowly filling your muscle stores, not by acting in the hour after you swallow it. In a 1996 study of 31 men, muscle total creatine rose about 20% after 6 days at 20 g a day, and rose by the same 20% over 28 days at 3 g a day⁵.

Nearly all of this research used creatine monohydrate, the most studied form⁶.

The usual adult protocol is a loading phase of 20 g a day, taken as 4 portions of 5 g for 5 to 7 days, followed by 3-5 g a day. Loading is optional: about 3-6 g a day without it also works, over 3 to 4 weeks⁶. For more on dosing, see our creatine evidence page.

Neither wins clearly. None of the 5 long-term trials below that compared the two found a statistically significant difference^{4, 7}. Most were small and had no placebo group, so they could miss a small difference, and reviews agree the evidence is too limited for firm conclusions^{1, 8}.

Trials that found no difference

• Older adults, 12 weeks: 22 people took creatine either just before or just after supervised training 3 days a week; muscle mass and strength rose similarly in both groups, and there was no placebo group⁹.
• Young adults, 8 weeks: in 10 people who trained each side of the body with creatine taken before on one side and after on the other, muscle thickness and strength gains were similar¹⁰.
• Collegiate athletes, 8 weeks: 34 trained men and women took 5 g within 1 hour before or after training, or a placebo; all three groups gained similar fat-free mass and strength, so creatine did no better than placebo at either time⁷.

Trials that hinted at an edge for after

• Recreational bodybuilders, 4 weeks: among 19 men, the post-workout group gained 2.0 kg of fat-free mass versus 0.9 kg with pre-workout creatine, but the difference was not statistically significant². The claimed edge rested on magnitude-based inference, a widely criticised statistical method⁸.
• Adults aged 50-71, 32 weeks: in 39 people, lean tissue rose 3.0 kg with creatine after training versus 0.5 kg on placebo, while creatine before training did not differ from placebo on lean mass³. The before and after groups did not differ significantly from each other, and strength gains were similar with either timing^{3, 4}.

In a 2026 pilot crossover trial in 11 men, a single dose taken 2 hours before a session increased the weight lifted versus placebo or no supplement, but not significantly versus a dose taken after. The authors call the result exploratory¹¹.

If you already drink a shake after training, adding creatine to it is a sensible default. For what creatine does for recovery itself, see creatine for post-workout recovery and creatine for muscle strength.

It probably makes no difference, though the evidence is thin. In a 12-week trial, 14 elite female handball players took creatine straight after strength sessions held either in the morning or in the evening (7 per group, with no placebo group); changes in body weight, body water, fat percentage and performance were very similar in both groups¹².

The authors' explanation fits the physiology: creatine is stored in muscle as phosphocreatine and is available whenever you need a burst of energy, regardless of the time of day¹². Our page on creatine and phosphocreatine restoration covers that mechanism.

Yes, if you want to keep your muscle stores full; daily intake is the standard approach. In the 1996 loading study, muscle creatine stayed raised on 2 g a day, but once intake stopped it drifted back to baseline over about 30 days⁵.

On a rest day, any time works; with a meal is an easy habit.

Taking it only on training days still helps. A 2021 meta-analysis in older adults found that creatine taken only on resistance-training days increased lean tissue mass and strength compared with placebo¹³. A 2022 review found no trial comparing daily with training-day-only intake⁴.

Either is fine: creatine works with or without food¹. Large amounts of carbohydrate, or carbohydrate with protein, help the body hold on to more creatine early in loading. There is little evidence that the extra carbohydrate changes the final muscle level, body composition or performance, and results with added protein are mixed¹.

• Carbohydrate: in 24 men loading with 5 g four times a day for 5 days, following each dose with 93 g of simple sugars raised the gain in muscle total creatine by 60%, an effect that appeared to work through insulin¹⁴.
• Protein plus carbohydrate: in 12 men taking four 5 g doses, about 50 g of protein with 47 g of carbohydrate per dose raised whole-body creatine retention by about 25%, as much as almost 100 g of carbohydrate did; the extra effect of insulin had weakened within the first 24 hours¹⁵.
• The catch: a large high-carbohydrate meal may slow how quickly creatine is absorbed from the gut, even as insulin helps muscle take it up¹⁶.

We found no trial that compared stomach upset with and without food. At usual doses, complaints are uncommon. In a 28-day trial in 59 soccer players, two 5 g doses a day caused no more stomach upset than placebo, but a single 10 g dose raised diarrhoea to 55.6% versus 28.6% with the split dose¹⁷. Across 685 clinical trials, gastrointestinal complaints were about as common on creatine as on placebo (5.51% vs 4.05% of participants)¹⁸.

Probably yes. In the trials that measured sleep, creatine did not worsen it, and some found small improvements. None tested a dose taken right at bedtime: one gave it around midday, and another spread 4 doses across the day^{19, 20}.

• Women who strength-trained, 6 weeks: in 21 participants, creatine increased total sleep time on training days compared with placebo, with no change in overall sleep-quality scores¹⁹.
• Active men, 7-day loading: in 14 men, creatine improved self-rated sleep quality but did not change how fast they fell asleep, sleep efficiency or total sleep time²⁰.
• Sleep deprivation: in 15 healthy adults kept awake for 21 hours, one very high dose (0.35 g/kg, about 25 g at 70 kg) improved cognitive performance and processing speed²¹. A 2026 systematic review found only 5 such studies, with promising but sparse results²².

The benefit for thinking appears during sleep loss, not in people who are sleeping enough¹. For the wider sleep evidence, see improved sleep quality; for thinking and memory, creatine for cognitive function.

The most debated pairing is caffeine, and the evidence is mixed. In a 1996 trial in 9 men, creatine loading increased torque during repeated bouts of maximal knee extensions by 10-23%, but adding 5 mg/kg of caffeine a day erased the gain²³.

A 2022 systematic review of 10 studies found that most did not show interference, but 2 found caffeine blunted creatine's effect when both were taken daily during loading²⁴. The 2025 expert review concluded that short-term use of both at under 5 mg/kg of caffeine a day likely causes no opposing muscle effects, though the pairing may add stomach upset¹.

A practical rule: if you drink coffee, there is no need to stop, but you can take creatine with a meal rather than with your pre-workout caffeine. Mixing creatine into a whey protein shake is fine; one 8-week trial gave it with whey and maltodextrin⁷. Among medicines, the main caution is anything affecting the kidneys: see below.

Healthy adults have few concerns: the NIH Office of Dietary Supplements calls creatine safe for short-term use, with weight gain from water retention as the main reported effect⁶. Several studies found a gain of about 1-2 kg (2-4 lb) in the first month of strength training⁶; loading alone causes short-term fluid retention of about 0.5-1.0 L²⁵.

• Kidney disease: creatine raises blood creatinine, the marker doctors use to estimate kidney function, without necessarily meaning harm, but there is very little safety evidence in people with kidney disease. A 2023 review advises people whose kidney disease has left them with very low kidney function to avoid creatine, and suggests kidney checks for people at risk of reduced function who take it long term²⁶. A 2025 meta-analysis, mostly in healthy participants, found a small creatinine rise and no difference in filtration rate²⁷. See our chronic kidney disease page.
• Medicines that affect the kidneys: the same review says the combined load of creatine and other drugs on the kidneys cannot be ruled out. One reported kidney decline on creatine was in a man with kidney disease who had taken cyclosporin, a drug that can harm the kidneys, for 5 years²⁶. Diuretics such as hydrochlorothiazide act on the kidneys, and its label advises doctors to consider stopping it if kidney function worsens²⁸, which a creatine-related creatinine rise could wrongly suggest. The NIH advises anyone on regular medicines to discuss supplements with their health care provider⁶.
• Anyone having blood tests: tell your clinician you take creatine, because the creatinine rise can be misread as a kidney problem²⁶.
• Pregnancy: no well-designed human trials have tested whether creatine is safe in pregnancy; the reassuring evidence so far comes from animal studies¹. Ask your doctor or midwife first.
• Teenagers: paediatric and high-school sports associations advise teenagers against using supplements to enhance performance, and most of the research is in adults⁶. The ISSN, a sports nutrition society, takes a different view: it found no scientific evidence that adolescents should not take creatine, and accepts it for those in serious, supervised training who keep to recommended doses²⁵. Check with a paediatrician or sports doctor first.

A simple routine that matches the trials^{1, 5, 17}:

• Do take it every day, training days and rest days, at a time tied to a habit: breakfast, your post-workout shake, or dinner.
• Do take it with a meal if that suits you. Large amounts of carbohydrate and protein improved retention during loading¹⁵, but creatine works without food too¹.
• Do split large doses. If you load, spread the day's intake into several portions⁶; a single 10 g serving made diarrhoea more likely than two 5 g servings¹⁷.
• Don't worry about the exact minute before or after training; the differences in trials were small or absent⁸.
• Don't stack it with daily high-dose caffeine during a loading week if performance is your goal²⁴.

Sample day for someone who trains after work: creatine with lunch on rest days, and in a shake straight after the session on training days.

Supplements in this guide

• Creatine Monohydrate
• Whey Protein

We searched PubMed and a biomedical literature index for trials comparing creatine timing (before vs after exercise, morning vs evening), creatine with carbohydrate or protein, creatine and sleep, creatine and caffeine, and creatine safety, and read the NIH Office of Dietary Supplements exercise fact sheet and the hydrochlorothiazide label. We read 26 study records and cited all of them, prioritising randomised trials and systematic reviews in adults.

The limits are real: most timing trials enrolled 10-40 people for 4-32 weeks, most had no placebo group, and none was large enough to detect a small difference between before and after. Written on 13 October 2026; independently reviewed and corrected on 14 October 2026.

1. Antonio J, et al. Part II. Common questions and misconceptions about creatine supplementation: what does the scientific evidence really show?. J Int Soc Sports Nutr. 2025;22(1):2441760. doi:10.1080/15502783.2024.2441760
2. Antonio J, et al. The effects of pre versus post workout supplementation of creatine monohydrate on body composition and strength. J Int Soc Sports Nutr. 2013;10:36. doi:10.1186/1550-2783-10-36
3. Candow DG, et al. Strategic creatine supplementation and resistance training in healthy older adults. Appl Physiol Nutr Metab. 2015;40(7):689-94. doi:10.1139/apnm-2014-0498
4. Candow DG, et al. Creatine O'Clock: Does Timing of Ingestion Really Influence Muscle Mass and Performance?. Front Sports Act Living. 2022;4:893714. doi:10.3389/fspor.2022.893714
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6. National Institutes of Health, Office of Dietary Supplements. Dietary Supplements for Exercise and Athletic Performance: Fact Sheet for Health Professionals. https://ods.od.nih.gov/factsheets/ExerciseAndAthleticPerformance-HealthProfessional/
7. Dinan NE, et al. Effects of creatine monohydrate timing on resistance training adaptations and body composition after 8 weeks in male and female collegiate athletes. Front Sports Act Living. 2022;4:1033842. doi:10.3389/fspor.2022.1033842
8. Ribeiro F, et al. Timing of Creatine Supplementation around Exercise: A Real Concern?. Nutrients. 2021;13(8). doi:10.3390/nu13082844
9. Candow DG, et al. Comparison of creatine supplementation before versus after supervised resistance training in healthy older adults. Res Sports Med. 2014;22(1):61-74. doi:10.1080/15438627.2013.852088
10. Forbes SC, et al. Timing of creatine supplementation does not influence gains in unilateral muscle hypertrophy or strength from resistance training in young adults: a within-subject design. J Sports Med Phys Fitness. 2021;61(9):1219-1225. doi:10.23736/S0022-4707.20.11668-2
11. Ben Maaoui K, et al. Acute Creatine Ingestion Before Resistance Training Enhances Strength Performance More than Ingestion During or After Training: A Randomized Crossover Pilot Trial. Nutrients. 2026;18(11). doi:10.3390/nu18111789
12. Jurado-Castro JM, et al. Morning versus Evening Intake of Creatine in Elite Female Handball Players. Int J Environ Res Public Health. 2021;19(1). doi:10.3390/ijerph19010393
13. Forbes SC, et al. Meta-Analysis Examining the Importance of Creatine Ingestion Strategies on Lean Tissue Mass and Strength in Older Adults. Nutrients. 2021;13(6). doi:10.3390/nu13061912 Our study summary.
14. Green AL, et al. Carbohydrate ingestion augments skeletal muscle creatine accumulation during creatine supplementation in humans. Am J Physiol. 1996;271(5 Pt 1):E821-6. doi:10.1152/ajpendo.1996.271.5.E821
15. Steenge GR, et al. Protein- and carbohydrate-induced augmentation of whole body creatine retention in humans. J Appl Physiol (1985). 2000;89(3):1165-71. doi:10.1152/jappl.2000.89.3.1165
16. McCall W, et al. Pharmacokinetics of creatine. Subcell Biochem. 2007;46:261-73. https://pubmed.ncbi.nlm.nih.gov/18652081/
17. Ostojic SM, et al. Gastrointestinal distress after creatine supplementation in athletes: are side effects dose dependent?. Res Sports Med. 2008;16(1):15-22. doi:10.1080/15438620701693280
18. Kreider RB, et al. Safety of creatine supplementation: analysis of the prevalence of reported side effects in clinical trials and adverse event reports. J Int Soc Sports Nutr. 2025;22(sup1):2488937. doi:10.1080/15502783.2025.2488937
19. Aguiar Bonfim Cruz AJ, et al. Creatine Improves Total Sleep Duration Following Resistance Training Days versus Non-Resistance Training Days among Naturally Menstruating Females. Nutrients. 2024;16(16). doi:10.3390/nu16162772
20. Ben Maaoui K, et al. 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. Nutrients. 2025;17(24). doi:10.3390/nu17243831
21. Gordji-Nejad A, et al. Single dose creatine improves cognitive performance and induces changes in cerebral high energy phosphates during sleep deprivation. Sci Rep. 2024;14(1):4937. doi:10.1038/s41598-024-54249-9
22. Williams NB, et al. Creatine Supplementation and Acute Sleep Deprivation: A Systematic Review of Cognitive, Psychomotor, and Mood Outcomes. J Integr Complement Med. 2026:27683605261456529. doi:10.1177/27683605261456529
23. Vandenberghe K, et al. Caffeine counteracts the ergogenic action of muscle creatine loading. J Appl Physiol (1985). 1996;80(2):452-7. doi:10.1152/jappl.1996.80.2.452
24. Elosegui S, et al. Interaction Between Caffeine and Creatine When Used as Concurrent Ergogenic Supplements: A Systematic Review. Int J Sport Nutr Exerc Metab. 2022;32(4):285-295. doi:10.1123/ijsnem.2021-0262
25. Kreider RB, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr. 2017;14:18. doi:10.1186/s12970-017-0173-z Our study summary.
26. Longobardi I, et al. Is It Time for a Requiem for Creatine Supplementation-Induced Kidney Failure? A Narrative Review. Nutrients. 2023;15(6). doi:10.3390/nu15061466
27. Naeini EK, et al. Effect of creatine supplementation on kidney function: a systematic review and meta-analysis. BMC Nephrol. 2025;26(1):622. doi:10.1186/s12882-025-04558-6
28. U.S. National Library of Medicine, DailyMed. Hydrochlorothiazide tablet, USP: prescribing information (revised 10/2021). https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=01f1f478-5493-439f-9b99-f4f82023781c