For most people: 3–5 g creatine monohydrate per day (maintenance dose). This saturates muscle creatine stores within 3–4 weeks. An optional loading protocol (20 g/day for 5–7 days, split into 4 doses) achieves saturation faster. There is no established benefit to doses above 5 g/day in the long term. Timing is not critical — consistency matters more than when you take it.
Key Facts at a Glance
| Standard maintenance dose | 3–5 g/day |
| Loading dose (optional) | 20 g/day for 5–7 days (in 4 divided doses) |
| Form | Creatine monohydrate only |
| Timing | Not critical — post-workout may offer marginal benefit |
| Upper safe limit | No established UL — 20+ g/day used safely in research |
| Time to saturation | 5–7 days (loading) or 3–4 weeks (maintenance) |
Loading Protocol vs Maintenance Protocol
Two approaches achieve the same end result — full muscle creatine saturation: Loading Protocol: 20 g/day for 5–7 days (in 4 × 5 g doses spread through the day) followed by 3–5 g/day maintenance. Achieves saturation in less than 1 week. More initial GI discomfort and water retention. Maintenance Only Protocol: 3–5 g/day consistently. Achieves the same muscle creatine saturation as loading — just more slowly (3–4 weeks vs 1 week). Less GI discomfort, less initial weight/water gain. The ISSN notes that loading is not necessary — it only accelerates the timeline. For most people starting creatine: the maintenance-only approach (3–5 g/day) is simpler, better tolerated, and reaches the same endpoint.
Is Timing Important for Creatine?
Timing is not as critical as consistency. Taking creatine daily — at any time — is the most important factor. That said, some evidence suggests post-workout creatine may offer a marginal advantage over pre-workout. A small RCT by Antonio & Ciccone (2013) found post-workout creatine produced slightly greater lean mass gains than pre-workout. Taking creatine with a carbohydrate and/or protein-containing meal may enhance uptake via insulin-mediated transport. The practical recommendation: take creatine when you will consistently remember it — morning, post-workout, or with a meal.
Creatine and Water Retention
Creatine draws water into muscle cells (intramuscular water retention) — a feature, not a bug. This intramuscular water makes muscle cells more hydratable and improves their contractile function. Initial loading may cause 1–2 kg of body weight gain from water — this is not fat gain and does not make you look 'puffy' like subcutaneous water retention does. The water is inside muscle cells, contributing to muscle fullness and function. This is a desired training adaptation.
Is Creatine Safe for Kidneys?
In people with healthy kidneys: creatine supplementation is safe. Multiple large reviews and meta-analyses confirm no kidney damage in healthy individuals at standard doses or even high research doses. Creatine is metabolised to creatinine (a kidney function marker) — supplementation raises serum creatinine, which can be falsely interpreted as impaired kidney function on blood tests. Inform your doctor you take creatine before any kidney function blood test. For people with pre-existing kidney disease: exercise caution and consult a nephrologist — not because creatine causes damage, but because elevated creatinine makes kidney function difficult to monitor accurately.
Creatine for Brain and Cognitive Function
Beyond muscle, creatine supports brain energy metabolism via phosphocreatine replenishment. Multiple RCTs show creatine supplementation improves working memory, processing speed, and cognitive performance — particularly under sleep deprivation or cognitive stress. The dose for cognitive benefits is the same as for muscle: 3–5 g/day. Magnesium L-threonate is the better-studied supplement for brain magnesium, but creatine addresses a different mechanism (energy availability vs mineral status) and both can be used together.
Frequently Asked Questions
Clinical References
- International Society of Sports Nutrition. (2017). Position Stand: creatine supplementation and exercise. → Source
- Antonio J & Ciccone V. (2013). J Int Soc Sports Nutr. The effects of pre versus post workout supplementation of creatine monohydrate on body composition. → Source
- Rae C et al. (2003). Proc Royal Soc. Oral creatine monohydrate supplementation improves brain performance. → Source