How much creatine per day: the short answer
For almost everyone, 3–5 grams of creatine monohydrate a day is the right dose. That's the recommendation in the International Society of Sports Nutrition's position stand, and it comes from a simple fact: muscle can only hold so much creatine. Roughly 3 g a day fills those stores in about four weeks; 5 g a day gets there a little faster and covers heavier people with a margin. Once stores are full, extra creatine is filtered out by your kidneys and excreted — you don't get stronger by taking more, you just make more expensive urine.
The weight-based version of the same rule is about 0.03 g per kilogram of body weight per day. A 60 kg (132 lb) woman lands under 2 g and rounds up to the 3 g floor; a 90 kg (200 lb) man lands at 2.7 g and usually takes 5 g. That's why the calculator clamps the result between 3 and 5 g for the standard profile.
Loading phase or not?
A loading phase — about 0.3 g/kg per day (roughly 20 g) split into four 5 g doses for 5–7 days — saturates your muscles in a week instead of a month. It's optional. The classic Hultman study in 1996 showed that 20 g/day for six days and 3 g/day for 28 days ended at the same muscle creatine level. Loading gets you there faster and is useful if you have a competition or training block coming; skipping it avoids the 2–4 lb of water weight and occasional stomach upset that come with 20 g days. Either way, the maintenance dose afterward is the same. The loading calculator lays out the day-by-day schedule.
Who might take more than 5 g
- Large or high-volume athletes. Some researchers suggest 5–10 g/day for people over about 90 kg or training multiple hours a day, since they have more muscle mass to saturate. The calculator's "large or high-volume athlete" profile uses about 0.05 g/kg.
- Adults 60+ doing resistance training. Studies led by Darren Candow have used about 0.1 g/kg/day (roughly 7–8 g for a 75 kg adult) with resistance training to improve strength and lean mass in older adults. Standard 3–5 g still works; the higher dose is what the trials used.
- Brain and cognition research. Trials looking at memory, sleep deprivation and mood often use 10–20 g/day, because the brain takes up creatine more slowly than muscle. That research is promising but less settled than the muscle research.
- Vegetarians and vegans don't need more — they start with lower stores because creatine comes from meat and fish — but they usually see a bigger response to the same dose.
Timing, form and what to mix it with
Timing matters far less than consistency. Take it whenever you'll remember, every day, including rest days. Some evidence favors taking it close to training (before or after) with a meal containing carbs and protein, which modestly improves uptake. Use creatine monohydrate: it's the most studied form, the cheapest, and nothing else — HCl, buffered, ethyl ester, "micronized" (just finer monohydrate) — has been shown to work better at equal doses. Mix in water, juice or a shake; it dissolves better in warm liquid. Skip the loading if your stomach is sensitive, and split any dose over 5 g across the day.
Quick reference by body weight
| Weight | Maintenance (0.03 g/kg, 3–5 g range) | Loading (0.3 g/kg/day, 5–7 days) |
| 120 lb / 54 kg | 3 g | 16 g (4 × 4 g) |
| 150 lb / 68 kg | 3 g (many take 5 g) | 20 g (4 × 5 g) |
| 180 lb / 82 kg | 3–5 g | 24 g (4 × 6 g) |
| 200 lb / 91 kg | 3–5 g | 24 g (4 × 6 g) — capped |
| 250 lb / 113 kg | 3.5–5 g (athletes up to 8 g) | 24 g (4 × 6 g) — capped |
The calculator caps loading at 24 g/day (four 6 g doses). Above that, extra creatine mostly passes through and the stomach complaints climb.
Safety
Creatine monohydrate is one of the most-studied supplements in existence. The ISSN's review found no harmful effects in healthy people at doses up to 30 g/day for five years. It does not damage healthy kidneys, cause dehydration or cramping (studies in college football players found fewer cramps, not more), or cause hair loss in any controlled trial. Two practical notes: creatine raises the creatinine level on a standard blood test, which can look like a kidney problem to a doctor who doesn't know you're taking it — tell them. And if you have existing kidney disease, are pregnant or breastfeeding, or are under 18, talk to your doctor first.
Frequently asked questions
How much creatine should I take per day?
3–5 g of creatine monohydrate daily for most adults. That saturates muscle in 3–4 weeks and keeps it there.
How much creatine for my weight?
About 0.03 g per kg per day for maintenance, with a 3 g floor and 5 g as the common ceiling. For loading, 0.3 g per kg per day split into four doses for 5–7 days.
Is 5 g of creatine a day enough?
Yes — it's the most-studied dose. Bigger or very active people sometimes go to 8–10 g, but 5 g saturates most adults.
Is 10 g a day too much?
Not harmful for healthy adults, but more than muscle needs. Higher doses are mostly studied for brain outcomes.
Do I need to cycle off creatine?
No. There's no evidence cycling helps. If you stop, muscle stores return to baseline over 4–6 weeks.
Should I take creatine on rest days?
Yes. Saturation depends on daily intake, not on training. Same dose, every day.
Sources
- Kreider RB et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation. JISSN 2017.
- Hultman E et al. Muscle creatine loading in men. J Appl Physiol 1996.
- Candow DG et al. Strategic creatine supplementation and resistance training in healthy older adults. Appl Physiol Nutr Metab 2015.
- Greenwood M et al. Cramping and injury incidence in collegiate football players are reduced by creatine supplementation. J Athl Train 2003.