Amino Acid ·Strong evidence ·Reviewed May 2026
One of the most researched supplements in history. Primarily known for athletic performance, but emerging evidence strongly supports cognitive benefits, especially under stress or sleep deprivation.
The bottom line
Evidence rating strong. Most-documented uses: strength and power, muscle growth, cognitive performance. 22 sources indexed (2015–2026), with 13 interaction records on file.
Core mechanism
Stored as phosphocreatine in muscles and brain. Donates phosphate group to ADP via creatine kinase to rapidly regenerate ATP during high-intensity energy demands. In the brain, supports ATP-dependent processes including neurotransmission, ion homeostasis, and membrane integrity.
Take daily with food; timing doesn't matter much. Full saturation in 3-4 weeks without loading.11,2
Dosing protocol
Loading is optional; daily maintenance reaches saturation in about 3-4 weeks without a loading phase.11
Ranked by evidence and value.
Real-world pricing across three quality tiers. Assumes Creatine Monohydrate.
Assumes 5 g/day. Bulk powder is still the clear value leader; flavored powders and capsules drive most premium pricing. Updated 2026-04-02.
How much you'd eat to match a supplemental dose.
This is why vegetarians often respond strongly to creatine supplementation.
A normal mixed diet provides some creatine, but not consistent supplemental doses.
Dose: 3-5 g daily
Timing: Any time; consistency matters more than timing
Loading is optional, not required.
Timing: Morning or post-workout
Vegetarians often respond more noticeably because baseline intake is lower.
Timing: Post-workout or with a meal
Hydrate normally; no special kidney detox routine is needed in healthy users.
Dose: 20 g daily split into 4 doses for 5-7 days, then 3-5 g daily
Timing: Split across the day during loading
Use only if you specifically want faster muscle saturation.
What to test, the optimal window inside the conventional range, and how long a response takes.
Creatine (3 to 5 g per day) raises muscle phosphocreatine; serum creatinine rises modestly as a benign byproduct of creatine turnover.11,7
Critical: do not interpret elevated creatinine in creatine users as kidney injury. Use cystatin C if assessing true renal function in supplementers.
Where this appears in the symptom-to-supplement map, ranked by relevance.
Most-studied ergogenic; 3 to 5 g per day saturates muscle phosphocreatine and improves power output.6,11
Loading not required; daily 3 to 5 g saturates over 4 weeks.
Creatine increases muscle phosphocreatine stores and, combined with resistance training, reliably improves strength and lean mass in older adults.7,17
Most effective paired with resistance training, and a steady daily dose works without loading.
Creatine improves phosphocreatine availability and supports repeated high-output training recovery.7,5
Best single supplement for strength/power recovery support.
Creatine supports cellular energy buffering and can improve both physical and some cognitive energy outcomes.1,2
Vegetarians often notice larger benefits.
Evidence-based stacks that include it, with the exact dose and timing each one uses.
Replenishes phosphocreatine stores for rapid ATP regeneration in both muscle and brain tissue
Brain tissue demands high ATP; creatine supplementation supports cognitive processing and working memory2,13
Enhances muscle recovery by increasing glycogen resynthesis and reducing markers of muscle damage7,22
The most extensively studied ergogenic supplement; increases phosphocreatine stores for high-intensity power output6,11
Preserves and supports lean mass during caloric deficit; small water-weight gain is offset by metabolic and performance benefits.3,5
Creatine increases muscle phosphocreatine stores, which help regenerate ATP during short, repeated high-intensity efforts and can improve strength and power output over a loading or maintenance period.7,22
Creatine increases intramuscular phosphocreatine stores, supporting rapid ATP resynthesis between efforts and aiding recovery of strength and power; daily intake matters more than dose timing because the benefit comes from saturated stores.1,2
Dietary creatine comes almost entirely from meat and fish, so vegetarians tend to have lower muscle creatine stores. Supplementation reliably restores these stores to support strength and high-intensity exercise, with emerging and not yet definitive evidence for cognitive benefits that may be more pronounced in vegetarians.1,2
Creatine supports muscle phosphocreatine stores and may help maintain strength and lean mass during a caloric deficit, complementing resistance training rather than replacing it. Pair it with adequate fluids and resistance exercise for best effect.7,22
Creatine increases muscle phosphocreatine stores, which supports training capacity and lean mass gains when combined with resistance exercise. In older adults the muscle and strength benefits are most consistent when creatine is paired with a structured training program rather than taken alone.22,3
Creatine biosynthesis disorders may respond to medical creatine therapy, while SLC6A8 transporter deficiency has limited response to creatine alone (PMID 15800449; PMID 24953403).
Recommendation: Suspected creatine deficiency disorders require medical diagnosis and monitoring rather than routine sports-supplement dosing.
Both support musculoskeletal function. Vitamin D3 enhances muscle protein synthesis, and creatine increases phosphocreatine stores for energy.
Recommendation: Effective combination for strength and muscle health, especially in those over 50.
Both enhance ATP availability through complementary mechanisms. Cordyceps supports mitochondrial ATP production; creatine buffers ATP via phosphocreatine.
Recommendation: Effective pre-workout combination for sustained energy output.
Magnesium is required for creatine kinase enzyme activity, which phosphorylates creatine to phosphocreatine.
Recommendation: Ensure adequate magnesium when supplementing creatine for optimal ATP buffering.
Both enhance physical and cognitive performance. Creatine buffers ATP in muscles and brain; Alpha-GPC supports cholinergic signaling and growth hormone release.
Recommendation: Effective performance stack for both cognitive and physical output.
Magnesium is required for creatine kinase enzyme activity, which phosphorylates creatine to phosphocreatine.
Recommendation: Ensure adequate magnesium when supplementing creatine for optimal ATP buffering.
Magnesium is required for creatine kinase enzyme activity, which phosphorylates creatine to phosphocreatine.
Recommendation: Ensure adequate magnesium when supplementing creatine for optimal ATP buffering.
Magnesium is required for creatine kinase enzyme activity, which phosphorylates creatine to phosphocreatine.
Recommendation: Ensure adequate magnesium when supplementing creatine for optimal ATP buffering.
Magnesium is required for creatine kinase enzyme activity, which phosphorylates creatine to phosphocreatine.
Recommendation: Ensure adequate magnesium when supplementing creatine for optimal ATP buffering.
Creatine enhances ATP regeneration while beta-alanine buffers intracellular acid (via carnosine) during high-intensity exercise. The combination addresses two distinct performance-limiting factors.
Recommendation: A well-researched ergogenic combination. Creatine 3-5g/day + Beta-alanine 3.2-6.4g/day (split doses to reduce paresthesia).
Both support resistance training adaptations through different pathways; combined use is common in performance protocols.
Recommendation: Common doses: 5 to 10 g BCAAs intra-workout plus 3 to 5 g creatine daily.
Complementary effects on lean mass and strength, with creatine enhancing high-intensity performance and HMB reducing muscle protein breakdown.
Recommendation: Reasonable to combine as part of a resistance-training and protein-adequate program; no timing separation required.
Taurine and creatine are both cell-volumizing osmolytes that support muscle hydration and performance, and are frequently combined in pre-workout formulas for complementary ergogenic effect.
Recommendation: Reasonable performance combination. Maintain adequate hydration when using both.
Numbered references. Citations throughout the page link here.
Marshall S, Kitzan A, Wright J et al.. Creatine and Cognition in Aging: A Systematic Review of Evidence in Older Adults. Nutrition reviews. 2026
Meta-analysis of 16 RCTs (492 participants) evaluating creatine's effects on overall cognitive function, memory, executive function, and attention in adults.
Creatine plus resistance training increased lean body mass by 1.14 kg and reduced body fat percentage by 0.88% versus resistance training alone.
Creatine improved memory (SMD = 0.29) with significant effects in older adults (66-76 years) versus younger individuals.
Delpino FM, Figueiredo LM, Forbes SC et al.. Influence of age, sex, and type of exercise on the efficacy of creatine supplementation on lean body mass: A systematic review and meta-analysis of randomized clinical trials. Nutrition (Burbank, Los Angeles County, Calif.). 2022
Elosegui S, López-Seoane J, Martínez-Ferrán M et al.. Interaction Between Caffeine and Creatine When Used as Concurrent Ergogenic Supplements: A Systematic Review. International journal of sport nutrition and exercise metabolism. 2022
Jiaming Y, Rahimi MH. Creatine supplementation effect on recovery following exercise-induced muscle damage: A systematic review and meta-analysis of randomized controlled trials. Journal of food biochemistry. 2021
Stares A, Bains M. The Additive Effects of Creatine Supplementation and Exercise Training in an Aging Population: A Systematic Review of Randomized Controlled Trials. Journal of geriatric physical therapy (2001). 2020
de Guingand DL, Palmer KR, Snow RJ et al.. Risk of Adverse Outcomes in Females Taking Oral Creatine Monohydrate: A Systematic Review and Meta-Analysis. Nutrients. 2020
Creatine supplementation did not significantly alter serum creatinine or plasma urea, indicating no adverse effects on renal function at studied doses and durations.
Creatine supplementation is generally well tolerated and not associated with clinically significant side effects in clinical trials.
Scientific evidence does not support claims that creatine causes kidney damage, hair loss, or dehydration; it is safe for healthy individuals.
Short and long-term supplementation (up to 30 g/day for 5 years) is safe and well-tolerated; creatine can improve exercise performance and may have neuroprotective benefits.
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