Creatine
Useful mainly for athletes and exercising adults seeking strength, power, and lean mass gains; also older adults managing muscle loss.
Quick decision guide
May help most
Athletes and exercising adults seeking strength, power, and lean mass gains; also older adults managing muscle loss
Common dosing range
3–5 g/day of creatine monohydrate
When to expect effects
Weeks (stores saturate in 3–4 weeks)
Watch out for
Raises serum creatinine — a lab artifact, not kidney damage; tell your clinician if you supplement
What is it
Creatine is a nitrogen-containing compound made in the liver, kidneys, and pancreas from the amino acids glycine, arginine, and methionine. It is stored mainly in skeletal muscle as phosphocreatine, where it serves as a rapid-recycling energy reserve for short, intense bursts of work.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
strength and high-intensity exercise performance Strong Evidence | Moderate; ~5–15% improvement in short-burst power/strength vs placebo in trained athletes | People doing resistance training, sprinting, or high-intensity interval work | 2–4 weeks to reach muscle saturation |
lean mass gain Strong Evidence | Modest; ~1–2 kg additional lean mass over training period vs placebo | Resistance-training adults on a progressive program with adequate protein intake | 4–12 weeks of consistent training plus creatine |
age-related muscle loss (sarcopenia) Good Evidence | Modest augmentation of resistance training benefits in older adults | Adults over 55 engaged in resistance training | 12–24 weeks |
cognitive performance under stress or sleep deprivation Limited Evidence | Small to modest; most apparent under stress or in low-creatine populations | Vegetarians, sleep-deprived individuals, and those under acute cognitive demand | 4–6 weeks of loading |
strength and high-intensity exercise performance
- Effect
- Moderate; ~5–15% improvement in short-burst power/strength vs placebo in trained athletes
- Best fit
- People doing resistance training, sprinting, or high-intensity interval work
- Time
- 2–4 weeks to reach muscle saturation
lean mass gain
- Effect
- Modest; ~1–2 kg additional lean mass over training period vs placebo
- Best fit
- Resistance-training adults on a progressive program with adequate protein intake
- Time
- 4–12 weeks of consistent training plus creatine
age-related muscle loss (sarcopenia)
- Effect
- Modest augmentation of resistance training benefits in older adults
- Best fit
- Adults over 55 engaged in resistance training
- Time
- 12–24 weeks
cognitive performance under stress or sleep deprivation
- Effect
- Small to modest; most apparent under stress or in low-creatine populations
- Best fit
- Vegetarians, sleep-deprived individuals, and those under acute cognitive demand
- Time
- 4–6 weeks of loading
Evidence for 4 uses
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
strength and high-intensity exercise performance
Supplement benefitCreatine is the most evidence-backed performance supplement in existence. Dozens of RCTs and multiple meta-analyses confirm that creatine monohydrate at 3–5 g/day increases muscle phosphocreatine stores, allowing faster ATP regeneration during high-intensity efforts. The benefit is specific to activities lasting 1–30 seconds (sprints, heavy sets) and translates to greater strength gains over training blocks.
Bottom line: The single most consistent ergogenic supplement for strength and power; backed by hundreds of RCTs.
lean mass gain
Supplement benefitMeta-analyses of resistance training RCTs consistently show creatine supplementation produces greater lean mass gains than placebo. Mechanisms include initial intracellular water retention and downstream anabolic signaling through cell volumization. The gains are real but modest in absolute terms; creatine augments training, it does not replace it.
Bottom line: Creatine reliably adds ~1–2 kg lean mass over a training block — the most consistent legal supplement for this goal.
age-related muscle loss (sarcopenia)
Supplement benefitRCTs in older adults show creatine combined with resistance training produces greater gains in lean mass, upper and lower body strength, and functional performance (chair rise, stair climbing) than training alone. Vegetarians and those with lower habitual meat intake see the most benefit. Creatine alone without exercise does not consistently prevent sarcopenia.
Bottom line: Best used alongside a resistance training program; augments gains and functional outcomes in older adults.
cognitive performance under stress or sleep deprivation
Supplement benefitBrain creatine supports cognitive tasks by buffering ATP during intense cognitive effort. RCTs show modest improvements in memory and intelligence tasks, particularly in vegetarians (who have lower brain creatine at baseline) and sleep-deprived individuals. In adequately nourished omnivores at rest, cognitive effects are inconsistent and small.
Bottom line: Cognitive benefit is real but modest, most relevant in low-dietary-creatine groups or under cognitive stress.
How it works
How to take it
What to track
4 commercial forms
Compare the main delivery options and what they’re best suited for.
Creatine monohydrate
The gold standard. Inexpensive, well-studied, effective. Micronized versions dissolve more easily but offer no metabolic advantage.
Roughly 99 percent absorbed. The reference form used in nearly all positive trials.
Creatine HCL (hydrochloride)
Often marketed as needing smaller doses with less bloating. Real-world studies have not shown meaningful differences in performance outcomes versus monohydrate.
More soluble in water; no consistent evidence of greater muscle uptake.
Creatine ethyl ester
Marketed in the early 2000s as superior; trials have shown it raises muscle creatine less than monohydrate. Generally not recommended.
Degrades rapidly to creatinine in the stomach; lower effective delivery.
Buffered creatine (Kre-Alkalyn)
Sold on the claim that alkaline buffering prevents stomach conversion to creatinine. Independent trials have not confirmed any superiority.
No demonstrated advantage in head-to-head trials with monohydrate.
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Who should avoid it
- People with chronic kidney disease (consult nephrologist first)
- People on dialysis
Pregnancy & breastfeeding
Insufficient safety data during pregnancy and breastfeeding — consult a clinician before use.
Interactions
Theoretical additive renal stress in people with pre-existing kidney vulnerability; no confirmed interaction in healthy adults
Early case reports suggested blunted ergogenic effect when combined; most modern data show no meaningful interaction at normal doses
Documented interactions
Evidence-graded pair pages with sources, dosing notes, and timing guidance — a complement to the narrative section above.
Beneficial pairs (2)
+ beta-alanine
synergyCreatine raises muscle phosphocreatine to regenerate ATP during very short, explosive efforts, while beta-alanine raises muscle carnosine to buffer the acid build-up that limits efforts lasting tens of seconds to a few minutes. Because they address different limiters of high-intensity performance, the two are commonly stacked, and the added benefit is modest and additive rather than dramatic.
+ carbohydrates
synergyTaking creatine together with carbohydrate raises insulin, which increases how much creatine skeletal muscle retains by stimulating the sodium-dependent creatine transporter. The effect mainly speeds up the loading phase; long-term muscle saturation is reached either way with daily consistency.
Protocols featuring Creatine
Evidence-backed routines where Creatine plays a role.
GLP-1 Companion (Muscle Preservation)
metabolic
GLP-1 medications (semaglutide/Ozempic/Wegovy, tirzepatide/Mounjaro/Zepbound, liraglutide) have transformed obesity medicine — producing 15-25% body-weight reductions that dwarf any prior pharmaceutical intervention. The downside: roughly 25-40% of the weight lost is lean mass (muscle, bone, organ tissue), and many users develop side effects from reduced food intake — nausea, constipation, fatigue, hair shedding, micronutrient gaps, and dehydration. This stack is specifically for adults ACTIVELY ON a GLP-1 medication, to mitigate those downsides. Whey protein (or EAA) preserves muscle during rapid weight loss; creatine compounds this with resistance training; electrolytes address the GLP-1-related dehydration risk; B-complex covers the energy and nutrient gaps that come with reduced food intake. This protocol does NOT replace medical management of your GLP-1 prescription. It complements it. Coordinate with the provider who prescribed your GLP-1 — they often appreciate patients taking this approach because it preserves the muscle mass that determines long-term metabolic outcomes.
Healthy Aging 60+
senior
Healthy aging is not about frailty management — it''s about preserving function, independence, and quality of life into the 70s, 80s, and beyond. The physiology of 60+ adults is genuinely different from younger adults: B12 absorption declines (~10-30% have impaired absorption due to reduced gastric acid), skin vitamin D synthesis drops by ~50% relative to 30-year-olds, anabolic resistance means older muscles need more protein to maintain mass, bone density loss accelerates (especially in postmenopausal women), and chronic disease burden rises. The good news: every one of these is addressable with the right combination of nutrition, training, and targeted supplementation. The strongest predictor of healthy aging is not genetics — it''s grip strength, gait speed, and cardiovascular fitness. This is the FOUNDATION protocol for adults 60+ — distinct from Foundational Longevity (broad-age longevity foundation) and Daily Essentials (general adult). Six core supplements that address the documented physiological changes of aging. Layer disease-specific protocols (Bone Density Support, Sarcopenia, Cardiovascular protocols, Cognitive Aging) on top of this baseline. The biggest single intervention available to older adults is resistance training. No supplement combination compensates for sedentary aging. Strength training 2-3× per week preserves muscle mass, bone density, and metabolic function more than any nutritional intervention.
Deep Work Focus
focus
Cognitive performance is a multi-input variable — sleep, caffeine, time-of-day, novelty, motivation. Supplement-wise, the highest-yield intervention by trial evidence is the L-theanine + caffeine combination: it preserves caffeine's alertness while blunting the anxiety/jitter spike. Omega-3 fatty acids (EPA/DHA) are a long-game foundational nutrient for brain structure and signaling — months-long supplementation shows modest improvements in attention and working memory. Creatine has emerging cognitive evidence, particularly under sleep deprivation and high mental load, in addition to its well-established physical benefits.
Foundational Longevity
longevity
Longevity supplementation is a noisy field. Most of the hype (NAD+ precursors, resveratrol, senolytics) rests on preclinical or short-term human data. What actually has long-term human evidence is unglamorous: correcting common deficiencies (vitamin D, omega-3), preserving muscle mass into late adulthood (creatine, protein), and supporting sleep and metabolic health. This protocol is the boring, evidence-backed foundation — start here before adding speculative add-ons.
Post-Workout Recovery
recovery
Recovery determines your next training session, not the workout you just finished. The best-evidenced supplemental levers are unglamorous: enough protein to drive muscle protein synthesis, creatine to maintain phosphocreatine stores, and a small set of anti-inflammatory aids for high-volume blocks or competition stretches. This protocol assumes you are training consistently — three or more sessions per week — and want to recover better between them. If you train less, the protein you eat at meals is sufficient.
Sarcopenia & Muscle Preservation
senior
Muscle loss starts in your thirties at roughly 1% per year and accelerates after 60 to about 2% per year — faster if you're inactive or recovering from illness. The biology is well-described: older muscle has "anabolic resistance," meaning the same protein meal that maximally stimulates muscle protein synthesis in a young adult barely registers in someone over 65. Declining testosterone and IGF-1, mitochondrial dysfunction, and chronic low-grade inflammation compound the problem. The clinical end-point is not cosmetic — sarcopenia is one of the strongest predictors of falls, fractures, hospitalization length-of-stay, and all-cause mortality in older adults. The single intervention that reverses this is resistance training. Supplements without lifting will not preserve muscle. With resistance training, the supplemental levers with the strongest evidence are: enough protein per meal (30-40 g, higher than RDA), creatine monohydrate (the most studied recovery and strength aid in older adults), supplemental leucine or HMB to overcome anabolic resistance, vitamin D for muscle function and fall prevention, and omega-3s to help blunt the inflammatory drag on protein synthesis. This protocol is for adults 60+ who want to preserve or rebuild muscle — particularly those with low activity, recent illness, hospitalization, or unintended weight loss.
Teen Athlete Foundation
kids
Teen athletes (high school sports, club teams, intensive training) have specific nutritional demands during growth + heavy training. The most-common gaps: iron (especially in female athletes — menstrual losses plus training losses), magnesium (under-consumed at all ages), omega-3 DHA (kids who don''t eat fish), and adequate vitamin D. This protocol covers those evidence-backed gaps. Creatine is included with a clear caveat — the safety data in adolescents is reassuring for ages 14+ when used appropriately, but it requires honest parent + athlete + coach + pediatrician conversation. CRITICAL FRAMING: - Teen sports nutrition is mostly about FOOD, not supplements. Adequate calories (often UNDER-consumed by young athletes), protein, carbs around training, hydration, and sleep all matter more than the supplement stack. - This protocol is for ages 14-18 (older adolescents). Younger children with intensive training should be evaluated by pediatric sports medicine. - NEVER use adult pre-workout, fat-burner, or testosterone-boosting products in teens. These are explicitly inappropriate and sometimes dangerous. - Coordinate ALL supplementation with the teen''s pediatrician, especially during growth spurts.
Food sources
| Food | Amount | %DV |
|---|---|---|
| Beef (raw) | ~2 g per pound | — |
| Pork | ~2.3 g per pound | — |
| Salmon | ~2 g per pound | — |
| Tuna | ~1.8 g per pound | — |
| Herring | ~3 to 4.5 g per pound | — |
| Chicken | ~1.5 g per pound | — |
Beef (raw)
- Amount
- ~2 g per pound
- %DV
- —
Pork
- Amount
- ~2.3 g per pound
- %DV
- —
Salmon
- Amount
- ~2 g per pound
- %DV
- —
Tuna
- Amount
- ~1.8 g per pound
- %DV
- —
Herring
- Amount
- ~3 to 4.5 g per pound
- %DV
- —
Chicken
- Amount
- ~1.5 g per pound
- %DV
- —
Choosing a product
What to look for on the label — and what to be skeptical of.
Look for…
Be skeptical of…
Frequently asked questions
Do I need to do a loading phase?⌄
No. Loading (20 g/day for a week) just saturates muscle stores faster. Taking 3 to 5 g per day reaches the same endpoint in about three to four weeks with less GI risk and no difference in final results.
Will creatine damage my kidneys?⌄
Not in healthy adults. Long-term studies have found no harm to kidney function. It does raise serum creatinine modestly, which can confuse routine labs unless your clinician knows you supplement. Avoid creatine if you have pre-existing kidney disease without medical clearance.
Should I cycle creatine?⌄
No physiological reason to cycle. Muscle stores stay elevated while you supplement and gradually return to baseline over four to six weeks after stopping. Continuous use is fine.
Is creatine only for men?⌄
No. Women respond to creatine the same way, though absolute strength gains scale with starting muscle mass. Women typically gain less visible body weight from water retention because they have less muscle to hold it.
Does creatine cause hair loss?⌄
A single 2009 study in rugby players found a small rise in DHT, a hormone implicated in male pattern baldness, but no actual hair loss was measured. No follow-up trial has replicated even the hormonal finding, and there is no direct evidence creatine causes hair loss.
References by claim
strength and high-intensity exercise performance
Naddafha et al., 2026 — PMC (2026) link
age-related muscle loss (sarcopenia)
Track Creatine with Pilora
Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.
Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.