Creatine Monohydrate: Uses, Benefits, Dosage & Safety
Last updated: August 2026 · Reviewed by the FactoWiki Editorial Team for clarity and source accuracy
Quick summary
Creatine monohydrate is the most researched sports supplement in existence, with hundreds of trials supporting increased strength and lean mass alongside resistance training. Every alternative form costs more and none has outperformed it.
What is Creatine Monohydrate?
Creatine monohydrate is creatine bound to a single water molecule — the cheapest, most stable and by far the most studied form. Creapure is a quality-assured German-manufactured version of the same compound. Alternatives such as creatine HCl, ethyl ester, buffered (Kre-Alkalyn) and nitrate exist mainly as marketing differentiation.
What Creatine Monohydrate is commonly used for
Strength and power output, lean mass gains alongside training, high-intensity repeat efforts, and increasingly cognition under sleep deprivation and in vegetarians.
How Creatine Monohydrate works
Creatine increases muscle phosphocreatine stores, which regenerate ATP during short, intense efforts. More available ATP means more reps at a given load, and more training volume produces more adaptation over weeks. The effect is indirect: creatine does not build muscle, it lets you train harder so that you do.
What the evidence says
Each claim below is tied to the specific study behind it, rather than to a general reading list.
- Meta-analyses consistently show creatine increases strength and lean mass when combined with resistance training. Kreider et al., Journal of the International Society of Sports Nutrition, 2017 — ISSN position stand. (PMID 28615996)
- Creatine supplementation does not adversely affect kidney function in healthy individuals. Poortmans & Francaux, Sports Medicine, 2000 — review of renal safety data. (PubMed)
- Monohydrate outperforms or matches alternative forms in comparative studies. Jagim et al., Journal of the International Society of Sports Nutrition, 2012 — comparative trial. (PubMed)
Typical dosage used in studies
3–5 g daily saturates muscle stores in roughly four weeks. A loading phase of 20 g/day split into four doses for 5–7 days reaches saturation faster but causes more digestive upset. Timing does not matter; consistency does.
Side effects and safety
Extensively studied and well tolerated. It does not damage healthy kidneys, does not cause dehydration or cramping, and does not cause hair loss on current evidence. It does raise serum creatinine, which can look like impaired kidney function on a blood test — tell your doctor you take it.
Medication interactions and who should avoid Creatine Monohydrate
Medication & safety check
No significant drug interactions established. People with existing kidney disease should discuss it with a doctor. Expect 1–2 kg of intracellular water retention in the first weeks, which reverses on stopping.
General information, not personal medical advice. If you take any medication, confirm it is safe to combine with Creatine Monohydrate with your doctor or pharmacist first.
Sources & further reading
The claim-level citations above are drawn from these sources:
- Kreider et al., Journal of the International Society of Sports Nutrition, 2017 — ISSN position stand — PMID 28615996
- Poortmans & Francaux, Sports Medicine, 2000 — review of renal safety data — find on PubMed
- Jagim et al., Journal of the International Society of Sports Nutrition, 2012 — comparative trial — find on PubMed
- NIH Office of Dietary Supplements
- NIH National Center for Complementary and Integrative Health
Frequently asked questions
Is creatine HCl better than monohydrate?
No trial has shown it produces better strength or mass outcomes. It is more soluble and marketed as requiring a smaller serving, but the evidence for superior results is not there. Monohydrate is cheaper and better studied.
Do I need to cycle creatine?
No. Long-term studies show no benefit to cycling and no tolerance development.
Does creatine cause hair loss?
There is no direct evidence that it does. The concern traces to a single small study measuring DHT, not hair loss.
Part of a wider guide
Creatine Monohydrate is one form of Creatine. This page covers what is specific to this form — absorption, tolerability, dosing and who it suits. For the underlying nutrient itself, its overall evidence base and general safety, read the Creatine guide.
Where you'll find Creatine Monohydrate
Creatine Monohydrate appears in Muscle, Strength & Performance formulas. Browse the supplement guides to see the products we review, each with a full breakdown of formula, pricing and safety.
Related ingredients to explore
Ingredients often studied or formulated alongside Creatine Monohydrate.
General information, not medical advice.