Creatine: The Complete Guide
Creatine is the most rigorously studied, most consistently effective supplement in sports nutrition — and it’s quietly become a "beyond muscle" story too (cognition, women, healthy aging). Here’s what the evidence actually supports, how to take it, which form is worth buying, and why the kidney/hair-loss fears don’t hold up.
Last reviewed Jun 24, 2026 · Evidence-based — every ingredient links to its underlying studies.
- Evidence
- Strong for performance; promising for cognition/aging
- Who benefits most
- Anyone strength-training; vegetarians/vegans (lower baseline); possibly older adults and sleep-deprived brains
- Who it won’t help
- It won’t build muscle without training; pure-endurance athletes see little
- Effective dose
- 3–5 g/day every day (loading 20 g/day, split into 4 doses, for 5–7 days is optional, just faster)
- Time to results
- ~2–4 weeks to saturate muscle (faster with loading)
Cheap, safe, and effective. Monohydrate, 3–5 g daily, consistently — the timing and fancy forms barely matter.
- Take 3–5 g creatine monohydrate every day
- Pair it with resistance training
- Be consistent — daily total matters more than timing
- Pay extra for "HCl", "buffered", or "liquid" forms
- Worry about kidney damage or hair loss (myths)
- Expect results without training
Key point: Creatine monohydrate, 3–5 g daily, is one of the few supplements that reliably works — for strength and power, and increasingly for the brain.
What the evidence supports
By use-case, not ingredient — creatine is one molecule with several jobs.
- Strength, power & muscle (with training)— The core, decades-deep evidence base
- High-intensity / repeated-sprint performance— Reliable ergogenic effect
- Cognition when stressed— Helps most when sleep-deprived or in older adults; less in rested young people
- Healthy aging / muscle preservation— Supports lean mass alongside resistance training (incl. on GLP-1 drugs)
- Recovery & glycogen— Modest support for recovery and muscle glycogen
- Women through menopause— Plausible and popular, but the dedicated trials are still thin
- Mood / depression adjunct, brain injury— Early signals; not established
Beyond muscle: brain, women, aging
Creatine isn’t just for lifters. The brain uses creatine for energy, and supplementation helps cognition most when the system is stressed — sleep deprivation and older age — while rested young people see little. For women and older adults, creatine plus resistance training supports lean mass and strength, which is why it keeps showing up in menopause and GLP-1 (Ozempic) muscle-preservation contexts. These uses are promising rather than proven; the strength/power evidence remains the rock-solid core.
Which form?
Short answer: monohydrate. The rest cost more for no proven advantage.
| Form | Verdict | Notes |
|---|---|---|
| 9.5Monohydrate | Use this | The studied form; cheapest, effective, well-tolerated |
| HCl / "buffered" (Kre-Alkalyn) | Skip | Marketed as better-absorbed; no proven advantage over monohydrate |
| Liquid / "micronized" / gummies | Optional | Micronized just dissolves better; liquid creatine degrades — not worth a premium |
Sources & further reading
Common questions
Does creatine damage your kidneys?
No — in people with healthy kidneys, decades of trials (including long-term and high-dose) show no kidney harm. It can mildly raise creatinine (a lab marker) without affecting actual kidney function — tell your doctor you take it before a kidney blood test so the result isn’t misread. If you have kidney disease, check with your doctor.
Does creatine cause hair loss?
The fear comes from a single study showing a rise in DHT; it has never been replicated, and no trial has shown actual hair loss. The evidence does not support the hair-loss claim.
Will it make me hold water / look bloated?
Creatine draws a little water into muscle cells early on — that’s part of how it works, not fat or bloating, and it’s minor. Most people don’t notice it.
Do I need to "load"?
No. Loading (20 g/day for ~a week) just saturates your muscles faster; 3–5 g/day gets you to the same place in 2–4 weeks. Pick whichever you prefer.
Should women take creatine?
Yes — the same strength/power benefits apply, and there’s growing (if still early) interest for women in menopause. The dose is the same 3–5 g/day.
Educational guidance, not medical advice. Evidence and safety details for each option live on its individual page; see a clinician for prescription treatments or persistent problems.
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