Creatine: how much to take, when and for whom

• Dose: 3-5 g of creatine monohydrate a day, every day, training days and rest days alike.
• Loading: optional. Without it your muscles saturate in about 4 weeks, with it in 5-7 days.
• Timing: consistency matters, the clock does not. After training, with food, may be a hair better.
• Form: creatine monohydrate is the most studied, and no pricier version has been shown to beat it.

What is creatine and what does it do?

Creatine is a nitrogen-containing compound your body makes itself (in the liver and kidneys) and tops up in smaller amounts from meat and fish. More than 95% of it sits in muscle as phosphocreatine, which quickly regenerates ATP, the muscle’s energy currency, during short, intense efforts such as heavy sets and sprints. You break down roughly 1-2 g of creatine a day and replace it. The extra 3-5 g from a supplement saturates your muscle stores, and that is what shows up as a little more strength and a few more reps.

Without training it does nothing. Creatine does not build muscle; it helps you squeeze out an extra rep or two in the gym, and over months that adds up to more growth.

How much creatine should you take a day?

According to the ISSN the maintenance dose is 3-5 g a day. The health claim authorised in the EU (creatine increases performance in successive bursts of short-term, high-intensity exercise) is also tied to 3 g a day. If you want to saturate your muscles faster, the loading scheme is 0.3 g per kg of body weight a day for 5-7 days, then the maintenance dose.

Loading is not necessary. On 3 g a day you end up in the same place after about 4 weeks, just more slowly. If you do load, split it into 4-5 doses: more than 5 g at once upsets many people’s stomachs. Larger athletes may need 5 g to maintain; most people never need more.

When to take creatine

Creatine works by saturation: it is not today’s dose that works today but the store you build over weeks. So the time of day is secondary; what counts is taking it every day. Research suggests post-workout intake may be slightly better than pre-workout, but the difference is small and inconsistent. If you want a rule: take it with your biggest meal or after training, and on rest days too.

It may absorb a little better alongside carbs and protein, so stirring it into a shake or your breakfast oats is a convenient habit. Our protein powder guide covers what to look for in a shake.

Creatine monohydrate: why this form?

The great majority of studies used creatine monohydrate, so it has the most data on both effect and safety. Pricier versions (creatine hydrochloride, buffered creatine, creatine ethyl ester and others) often promise “better absorption” or “no water retention”, but according to the ISSN there is no evidence that any of them beats monohydrate.

What to look for on the label

• Ingredients: one line only: creatine monohydrate. Flavoured products or ones padded with vitamins or “matrices” rarely contain much creatine.
• Purity, few additives: micronised powder dissolves better. Some makers use their own trademarked raw material, flagged on the pack; that speaks to purity, the effect is the same.
• Amount per serving: 3 g or 5 g of creatine monohydrate, not the weight of the whole scoop.
• Independent testing: if the maker has the purity verified by a lab, that is a plus.
• Price: work it out per 3 g: price / (pack size in grams / 3). A made-up example: 500 g for 7,000 Ft, so 3 g costs 42 Ft and a month (30 days) 1,260 Ft.

Water, weight and creatine side effects

Creatine draws water into muscle cells, so a 1-2 kg (2-4 lb) weight gain in the first weeks is common. It is not fat and not water under the skin but fluid inside the muscle. According to the ISSN creatine does not cause dehydration or cramps, though it is sensible to drink a bit more than usual. If you compete in a weight class or have to hit a number on the scale, factor it in.

Beyond that side effects are rare: large doses taken at once (over 5 g) can cause bloating, diarrhoea or stomach upset. If that happens, split the dose, take it with food, or skip loading and go straight to the maintenance dose.

Creatine and the kidneys: what is true in the myth?

The ISSN review found no evidence that short or long-term creatine use at recommended doses harms the kidneys of healthy adults. The myth comes from a lab value: creatine breaks down into creatinine, which doctors use to measure kidney function. On creatine your blood creatinine can rise without your kidneys losing any function.

Creatine for women, vegetarians and teenagers

• Women: the same dose, and there is no such thing as “women’s creatine”. The effect is not sex-dependent; most studies simply enrolled mostly men.
• Vegetarians and vegans: baseline muscle creatine is lower (it comes from meat), so according to the ISSN the response is often bigger. Supplement creatine is synthetic, not animal-derived.
• Pregnancy and breastfeeding: there is not enough data, so do not take it.
• Under 18: only after checking with a doctor or sports professional.

Creatine and caffeine: is the myth true?

The idea started with a small 1996 study in which caffeine blunted creatine’s effect. Later research has not confirmed it consistently, and the ISSN does not advise against using the two together. With a coffee or two a day there is no reason to avoid creatine. We cover the upper limits for caffeine on our supplements page.

Who benefits, and who can skip it

If you lift regularly and the basics are in order (enough calories, a daily protein target from the protein calculator, sleep), creatine is one of the few supplements with proven benefit. If you do not train, or your diet is not sorted yet, it is not the next step. You can take it while cutting too: in a calorie deficit it may help you hold on to strength.