Creatine Monohydrate for Muscle Strength & Physical Function
500+ RCTs: 5–15% strength and power improvement, effective across ages including older adults; cognitive benefits emerging.
Overview
Verdict
Creatine combined with resistance training consistently produces greater gains in strength and lean mass than training alone, with the effect largely mediated by increased training volume and quality.
How It Works
Downstream effects
Dosing & Protocol
Doses used in human trials
| Population | Dose | Schedule | Notes |
|---|---|---|---|
| General strength training | 3-5 g creatine monohydrate | Once daily | Standard maintenance dose in most trials |
| Rapid saturation | 20 g split into 4 doses | Daily for 5-7 days | Then drop to 3-5 g daily |
| Older adults with resistance training | 3-5 g | Once daily alongside training | Studied for strength and physical function |
| Larger individuals | 5-10 g | Once daily | Scaled roughly to lean mass |
Creatine without resistance training produces little strength gain. The training is the stimulus.
Simple protocol
- 1
Get the training right first
Two to four resistance sessions a week with progressive overload is the actual driver.
- 2
Take 3-5 g monohydrate daily· Minimum 8-12 weeks to judge
Every day, including rest days, since the goal is saturated stores.
- 3
Load only if you want a faster start
20 g daily in four doses for five to seven days.
- 4
Track load and repetitions
Strength progression is the outcome to watch, not the scale.
- 5
Keep protein adequate
Around 1.6 g per kg body weight per day supports the same adaptation.
- 6
Reassess at 12 weeks
If strength has not moved, the programme is the more likely problem.
Evidence
- Direction of effect
- Greater strength and lean mass gain than training alone
- Required conditions
- Progressive resistance training and adequate protein
- Time to assess
- 8-12 weeks
- Population breadth
- Trained, untrained and older adults
- Effect size
- Modest and additive to training, not independent of it
- Main limitation
- No individual trials are currently linked to this pairing in our database
Safety
Creatine amplifies training, it does not replace it
Without progressive resistance training, creatine produces little strength gain. Fix the programme before adding the supplement.
Interactions & Conflicts
Interactions and cautions
| Interacts with | Severity | Mechanism | Action |
|---|---|---|---|
| Chronic kidney disease | high | Increased creatinine load and altered filtration markers | Only under medical supervision |
| Routine kidney blood tests | low | Serum creatinine rises without a change in kidney function | Tell your clinician you supplement |
| Weight-class sports | low | 1-2 kg of intracellular water gain | Plan around weigh-ins |
| Diuretics | moderate | Competing effects on fluid balance | Keep fluid intake normal and discuss with a prescriber |
| Inadequate protein intake | low | Limits the adaptation creatine is amplifying | Aim for around 1.6 g per kg body weight daily |
| Tested athletes | moderate | Contamination reported across the supplement market | Use third-party batch-tested products |
References
- International Society of Sports Nutrition position stand: creatine supplementation and exercise
- Wallimann T et al. Creatine in health and disease. Molecular Aspects of Medicine (2011)
- NIH Office of Dietary Supplements - Dietary supplements for exercise and athletic performance
Frequently Asked Questions
Medical Disclaimer
The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.
Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.