Creatine
Creatine monohydrate — beyond muscle. Cognitive benefits, neuroprotection, and the most studied supplement in history.
VERDICT
The Protocol says: Creatine is one of the most well-researched supplements with a genuinely robust safety profile—it doesn't harm your kidneys or cause hair loss in healthy people, despite what you've heard. The real benefits are clear for muscle strength and size (especially with exercise), cognitive function (particularly if you're sleep-deprived or vegetarian), and bone density in postmenopausal women, but don't expect miracles for muscle damage recovery or sleep quality.
Key Findings
- Creatine supplementation consistently improves strength and lean muscle mass in both men and women across all age groups, with benefits appearing within 2 weeks of training.
- Cognitive benefits are real but selective: creatine improves memory in healthy adults, with strongest effects in sleep-deprived people and those eating vegetarian diets.
- Despite raising serum creatinine levels (which looks bad on blood tests), multiple meta-analyses confirm creatine does not actually harm kidney function in healthy individuals.
- 2 years of 3g daily creatine with exercise improved bone mineral density in postmenopausal women with osteopenia—a genuine clinical benefit for fracture prevention.
- Creatine does not increase DHT, cause hair loss, harm females differently than males, or produce excess muscle damage despite theoretical concerns.
- Adding creatine to antidepressants in women accelerated symptom improvement beyond antidepressants alone, though this finding comes from a single RCT and needs replication.
All Studies (50)
Sorted by impact. Each study summarized in one sentence.
Meta-analysis found creatine supplementation does not harm kidney function in healthy people despite raising serum creatinine levels.
Creatine safe for kidneys in healthy individuals
Creatine supplementation improved memory and cognitive function across multiple studies, with benefits strongest in sleep-deprived and vegetarian populations.
Creatine boosts memory and cognitive performance
Creatine supplementation improved memory performance in healthy adults compared to placebo in randomized controlled trials.
Creatine enhances memory in healthy adults
12 weeks of creatine supplementation did not increase DHT levels or cause hair loss in healthy young males.
Creatine doesn't cause hair loss
2 years of creatine supplementation with exercise improved bone mineral density in postmenopausal women compared to placebo.
Creatine plus exercise strengthens aging bones
Systematic review: creatine monohydrate shows no increased adverse outcomes in female users compared to males.
Creatine safe for women at standard doses
Systematic review: creatine plus exercise produces additive strength and muscle gains in older adults similar to younger populations.
Creatine benefits strength in aging adults
2-year trial: 3g daily creatine improved bone density in postmenopausal women with osteopenia versus placebo.
Creatine strengthens aging bones in women
8-week study: creatine increased strength within 2 weeks during resistance training without increasing muscle damage markers.
Creatine boosts strength fast and safely
Adding creatine to antidepressants improved depression symptoms faster and more effectively than antidepressants alone in women.
Creatine accelerates antidepressant response in women
Creatine increased lean body mass both standalone and when combined with resistance training in men and women.
Creatine builds muscle mass alone and with training
Creatine monohydrate improved muscle recovery after intense eccentric exercise across different ages and sexes.
Creatine speeds recovery from muscle damage
Meta-analysis of 23 studies found creatine has limited benefits for muscle damage recovery despite theoretical promise.
Creatine recovery benefits weaker than expected
Short-term creatine loading increased strength, reduced muscle soreness, and improved recovery in trained athletes within days.
Creatine quickly boosts strength and recovery
Creatine loading improved physical performance and recovery but did not significantly enhance sleep quality or cognitive function.
Creatine boosts performance, not sleep or cognition
Creatine monohydrate showed minimal benefit for endurance performance in trained athletes, unlike its strong effects on short-term strength.
Creatine doesn't boost endurance capacity
Creatine supplementation for 7 days didn't negatively affect blood or urine health markers in resistance-trained men.
Standard creatine dosing appears safe
Resistance training plus creatine reduced oxidative stress markers and improved muscle strength and quality of life in older adults.
Creatine plus training reduces aging stress
Creatine with caffeine improved body composition, strength, and reduced fatigue during resistance training in trained young adults.
Creatine plus caffeine boosts strength gains
Creatine loading improved exercise recovery and repeated sprint performance in women throughout the menstrual cycle.
Creatine enhances female athletic recovery
8-week pilot study: creatine added to therapy reduced depression scores more than therapy alone in under-resourced populations.
Creatine may boost antidepressant therapy effects
Creatine hydrochloride and monohydrate both improved strength and muscle similarly when combined with resistance training in young adults.
Both creatine forms equally boost strength gains
Review: vegetarians have lower natural creatine stores and see greater strength improvements from supplementation than meat-eaters.
Vegetarians benefit more from creatine
Systematic review: alternative creatine forms lack evidence; creatine monohydrate remains the most proven version for performance.
Stick with standard creatine monohydrate
Creatine supplementation increased power output during repeated treadmill sprints in recreationally active men.
Creatine boosts repeated sprint power
Whey protein and creatine separately improved muscle growth; combined they enhanced type II fiber hypertrophy during resistance training.
Creatine plus whey optimizes muscle fiber growth
Low-dose creatine for 14 days improved muscle power output in elite teenage soccer players.
Short-term creatine enhances youth athletic power
Creatine supplementation improved jump performance and scoring in young basketball players during strength training.
Creatine boosts jumping and scoring in youth athletes
Systematic review found creatine benefits aging muscle and bone; cognitive effects in older adults remain unclear.
Creatine helps aging muscle; brain effects unclear
28-day creatine pre-loading accelerated recovery from exercise-induced muscle damage in healthy young men.
Creatine speeds muscle damage recovery
Pre-workout blend with 3.3g creatine improved jumping, sprinting, and agility in trained basketball players.
Creatine in pre-workout mix boosts athletic performance
Creatine added to standard bipolar depression treatment showed promise in a small proof-of-concept trial.
Creatine may help treat bipolar depression
Systematic review identified creatine as effective supplement for wrestlers improving strength and power.
Creatine benefits wrestlers' performance
Single dose of creatine improved basketball skill performance in adolescents during complex decision-making situations.
Acute creatine boosts basketball skill under pressure
One-year creatine supplementation preserved muscle mass in kidney disease patients on hemodialysis.
Creatine preserves muscle in kidney disease
Combining creatine, caffeine, and sodium bicarbonate provided no extra performance boost beyond individual effects.
No synergy between creatine and other supplements
Eight weeks of creatine with glucose improved fatigue, exercise tolerance, and symptoms in long COVID patients.
Creatine-glucose combination eases long COVID symptoms
Combined creatine, beta-alanine, and citrulline improved basketball players' sprint performance more than single supplements alone.
Combined supplements boost sprint performance best
Seven days of creatine supplementation raised muscle creatine levels in vegans and vegetarians, but sprint performance effects unclear.
Creatine builds in vegans' muscles after one week
Creatine supplementation may support musculoskeletal injury recovery in athletes when combined with appropriate rehabilitation protocols.
Creatine aids injury rehabilitation
3 weeks of creatine in rugby players shifted hormone ratios toward dihydrotestosterone, a more active androgen form.
Creatine alters DHT-to-testosterone ratio
Creatine plus HMB combined for 10 weeks showed mixed results on endurance athlete performance measures.
Creatine and HMB combination shows unclear benefits
Creatine supplementation increased total sleep duration in naturally menstruating women, especially on resistance training days.
Creatine improves sleep in menstruating women
Four weeks of creatine supplementation improved blood vessel function in sedentary older adults.
Creatine improves vascular health in aging
Review found limited evidence for creatine effectiveness in wheelchair athletes' performance enhancement.
Creatine evidence weak for wheelchair athletes
Cochrane review found insufficient evidence that any treatment significantly improves Charcot-Marie-Tooth disease outcomes.
No proven treatment for CMT disease confirmed
Systematic review found creatine plus HMB combination lacks clear evidence of benefits beyond each supplement alone.
Creatine-HMB combo not proven superior
Cochrane review of mitochondrial disorder treatments found creatine showed promise but insufficient robust evidence for clinical use.
Creatine promising but unproven for mitochondrial disease
Creatine loading increased total body water and intracellular fluid in women across menstrual cycle phases.
Creatine increases body water in women
Creatine supplementation increased total body water and lean mass estimates in female collegiate dancers.
Creatine increases water and lean mass in dancers