Creatine: Effects, Dosage and Myths Fact-Checked

If there is one supplement that actually deserves the hype, it is creatine. Since the early 1990s it has been investigated in several hundred studies – in athletes, older adults, women, vegetarians, even in neurological diseases. The results are remarkably consistent: creatine improves performance in short, intense efforts and supports gains in strength and muscle mass. At the same time, it is one of the safest and cheapest supplements there is.

Even so, numerous myths persist: creatine damages the kidneys, makes you fat, causes hair loss, is "doping", or has to be taken in complicated cycles. In this guide we check what is true – and explain step by step how to use creatine properly. It is the pillar article of our Supplements topic.

What is creatine anyway?

Creatine is a substance your body makes itself from the three amino acids arginine, glycine and methionine – mainly in the liver and kidneys. About 95 per cent of the body's creatine is stored in skeletal muscle, most of it as phosphocreatine.

The body produces about one to two grams a day on its own. We also get creatine from food, mainly meat and fish: a kilogram of raw beef or salmon contains roughly three to five grams. Vegetarians and vegans therefore get hardly any creatine from their diet and have lower muscle stores on average – they often benefit particularly strongly from supplementation.

How creatine works: energy for the first few seconds

Every muscle contraction needs ATP (adenosine triphosphate), the universal energy currency of the cell. The problem: muscle only stores enough ATP for a few seconds of maximal work. After that it has to be regenerated quickly. This is where phosphocreatine comes in: it donates its phosphate group and rebuilds used ATP in fractions of a second.

The fuller your phosphocreatine stores, the longer your muscle can deliver energy at high intensity. In practice, that means you manage one or two more reps in a hard set, you stay fast a touch longer in a sprint, and you recover a little faster between sets. Over weeks and months these small advantages add up to more training volume – and therefore more strength and muscle growth.

What creatine has been shown to do

The research can be summarised in five key points:

1. More strength and power: meta-analyses show additional strength gains on average in exercises such as the bench press and squat compared with placebo when creatine is combined with strength training.
2. More muscle mass: combined with training, creatine leads on average to slightly greater gains in lean mass. Part of that is water in the muscle, part real tissue – probably because more training volume becomes possible.
3. Better sprint and interval performance: in repeated short efforts, such as team sports or HIIT training, athletes benefit noticeably.
4. Faster recovery between sets: the stores refill more quickly.
5. Possible benefits for the brain: some studies suggest positive effects on cognitive performance during sleep deprivation and in older age. The evidence here is less clear, though.

It is important to keep things in perspective: creatine is not a steroid. It will not turn a mediocre programme into a good one. The effect is noticeable, but it is in the range of a few extra per cent – not miracles. Training, nutrition and sleep remain the big levers, as we explain in detail in the muscle-building guide.

Who benefits most?

Not everyone responds equally. About 20 to 30 per cent of people are considered "non-responders" – usually because their diet already keeps their stores well filled. The groups that benefit most:

For pure endurance athletes the benefit is smaller, but not zero – especially for surges and final sprints. More in Creatine for endurance athletes and runners.

Dosage: it really is this simple

The good news: taking creatine correctly is simple. Most of the myths around loading phases, cycles and timing make it more complicated than it is.

The maintenance dose: 3 to 5 grams a day

For the vast majority, 3 to 5 grams of creatine monohydrate a day is enough. At this amount, muscle stores are fully saturated after about three to four weeks and stay that way as long as you keep taking it. Heavier athletes over about 90 kg can aim for the upper end. More than five grams a day brings no extra benefit – the excess is excreted in the urine.

The loading phase: optional, not necessary

If you want results faster, you can start with a loading phase: about 20 grams a day for 5 to 7 days, split into four servings of 5 grams. After that, continue with 3 to 5 grams. That way your stores are full after one week instead of four.

The downside: larger single servings can cause bloating, diarrhoea or stomach discomfort in some people. And after a month the result is exactly the same as without loading. For most people, then: skip it and start directly with the maintenance dose.

Timing: before or after training?

Some studies suggest a minimal advantage when creatine is taken around training, especially afterwards. The effect, however, is small and inconsistent. What matters is that your stores stay full – and you achieve that through daily, regular intake, not perfect timing.

The best time is therefore the one you will not forget: in the morning with your coffee, at lunch or in your post-workout shake. Taking it with a meal that contains carbohydrates and protein can slightly improve uptake into the muscle.

On rest days too?

Yes. The point is not to "supply" creatine for a particular workout but to keep your stores permanently full. If you skip it on rest days, your stores slowly decline – not dramatically, but unnecessarily.

Which form of creatine is best?

The shelves are full of variants: creatine monohydrate, creatine HCl, Kre-Alkalyn, creatine ethyl ester, creatine malate, "buffered" creatine, liquid creatine, creatine capsules with additives. Research gives a clear answer: creatine monohydrate is the best-studied form and at least as effective as any other. None of the more expensive alternatives has shown a proven advantage in direct comparisons, and some even perform worse.

What to look for when buying:

• Pure monohydrate without unnecessary additives.
• Fine milling ("micronised") dissolves better in water but is not a must.
• A seal from independent testing for contaminants and banned substances, especially for competitive athletes.
• Powder rather than capsules: you would need six to eight capsules for 5 grams – powder is cheaper and more practical.

General criteria for good supplement quality are explained in Supplement quality: how to recognise good products.

The big myths fact-checked

Myth 1: "Creatine damages your kidneys"

This concern is the most common and at the same time the best researched. In healthy people, studies using standard doses over periods from months to several years have shown no deterioration in kidney function.

So where does the myth come from? Creatine is broken down in the body into creatinine – and creatinine is a lab value doctors use to estimate kidney function. People who take creatine often have slightly elevated blood creatinine without their kidneys working any worse. That can lead to wrong conclusions in routine check-ups. So mention that you take creatine before having blood drawn. Which other blood values matter for athletes is covered in Blood tests for athletes.

Important: anyone who already has kidney disease should only take creatine after consulting a doctor.

Myth 2: "Creatine makes you fat"

In the first weeks, many people gain one to two kilograms. That is not fat but water stored inside the muscle cells – creatine is osmotically active and draws water with it. That is actually desirable: a well-hydrated muscle cell performs better, and the muscle looks fuller.

The idea that creatine causes a "bloated" look under the skin, on the other hand, is not supported by evidence. The water ends up in the muscle, not in the subcutaneous tissue. If you are dieting, do not over-interpret the scale after starting creatine – more about weight fluctuations in the calorie deficit guide.

Myth 3: "Creatine causes hair loss"

This myth goes back to a single study from 2009. In college rugby players, creatine raised levels of DHT (dihydrotestosterone) – a hormone linked to hereditary hair loss in people with a genetic predisposition. Hair loss itself was not even measured in that study.

Since then, several studies have looked at hormone levels under creatine without confirming a comparable DHT increase, and a newer study found no signs of changed hair follicles after several weeks of creatine use. A robust link between creatine and hair loss has not been demonstrated. If you have a strong family history and want to be on the safe side, you can discuss it with a dermatologist. We tell the whole story in Hair loss and training: myths about creatine and testosterone.

Myth 4: "Creatine causes cramps and dehydration"

Early anecdotes in sport linked creatine to muscle cramps and heat problems. Controlled studies have not confirmed this – some even found fewer cramps and injuries in athletes taking creatine. Simply drink normally and enough throughout the day.

Myth 5: "Creatine is doping"

No. Creatine is not on the World Anti-Doping Agency's prohibited list, is a natural part of the diet and is produced by the body itself. It is freely available and widely used in sport.

Myth 6: "You have to cycle creatine"

The idea of taking creatine in cycles with breaks so the body does not shut down its own production is not supported by evidence. Natural production is turned down while you supplement, but it returns to normal after you stop. Breaks bring no benefit.

Creatine after 40 and 50

With age, the body loses muscle mass and strength unless you counteract it – a process known as sarcopenia. Several studies show that creatine combined with strength training leads to greater gains in strength and lean mass in older adults than training alone. Without training, the effect is considerably smaller.

For people over 40, creatine is therefore one of the few supplements with a real, proven benefit. The dosage stays the same: 3 to 5 grams a day. How to structure strength training as you age is covered in Fit after 50: strength training against muscle loss and Building muscle after 40.

Combining creatine: what works, what does not?

With protein: no problem – on the contrary, a post-workout shake is a practical vehicle. More in Whey protein.

With caffeine: some older studies suggested that caffeine might blunt the effect of creatine. Newer research does not clearly confirm this for normal amounts. If you react to the combination, for example with stomach discomfort, you can separate the two. Everything about caffeine is in Caffeine as a performance booster.

With carbohydrates: taking it with meals containing carbohydrates and protein can slightly improve uptake into the muscle. A nice bonus, but not essential.

In all-in-one boosters: many pre-workout products contain creatine – often at too low a dose. Check the amount per serving. What else goes into boosters is explained in Pre-workout boosters.

Creatine from food: is diet enough?

In theory you can raise your stores through diet. In practice that is hardly feasible. The overview below shows rough values for raw foods – some is lost during cooking:

• Herring0.5–0.7 kg
• Beef1.0–1.25 kg
• Salmon1.0–1.25 kg
• Pork1.0–1.25 kg
• Chicken1.25–1.7 kg

›Prikaži podatke v tabeli

Kategorija	Amount for 5 g creatine
Herring	0.5–0.7 kg
Beef	1.0–1.25 kg
Salmon	1.0–1.25 kg
Pork	1.0–1.25 kg
Chicken	1.25–1.7 kg

To get five grams a day from food, you would have to eat more than a kilogram of meat or fish – every day. Someone with a mixed diet typically gets one to two grams from food, a vegetarian almost none. Supplementation is therefore not just more convenient but the only realistic way to full stores.

Creatine for vegetarians and vegans

Because plant foods contain practically no creatine, muscle stores in vegetarians and vegans are lower on average. The body only partly compensates through its own production. Studies accordingly show that people on vegetarian diets often benefit more from supplementation – both in performance and in lean mass.

One advantage: creatine monohydrate is generally produced synthetically and is therefore vegan. Just check whether capsule shells are made of gelatine – with powder the question does not arise. How to build muscle as a vegetarian or vegan in general is explained in Building muscle on a vegan diet.

What happens when you stop taking creatine?

When you stop taking creatine, nothing dramatic happens at first. Muscle stores slowly fall back to baseline over about four to six weeks, and your body's own production ramps up again. During this time you lose the extra stored water – the scale shows one to two kilograms less and your muscles look slightly less full.

Muscle mass you have actually built thanks to better training performance, on the other hand, stays as long as you keep training and eating enough. Your strength does not disappear overnight either; you will simply manage one rep less in very hard sets than with full stores. So there is no "creatine crash" – and no reason not to start out of fear of one.

How you can tell creatine is working

Creatine does not work overnight, and you do not feel it like a coffee. The effects show up indirectly:

• You manage one or two more reps at the same weight.
• You recover a little faster between sets.
• Your body weight rises by one to two kilograms in the first weeks.
• Your muscles look slightly fuller.

If you log your training numbers, you will spot the effect most reliably. How to keep a useful training log is explained in Keeping a training log.

Side effects and who should be careful

Creatine is one of the best-tolerated supplements. The most common side effects are digestive discomfort – usually with large single servings during a loading phase – and the water-related weight gain mentioned above. Both can be avoided with smaller servings and by skipping the loading phase.

Caution, or a conversation with a doctor, is advised for:

• existing kidney disease,
• taking medication that puts strain on the kidneys,
• adolescents under 18, for whom the evidence is thinner.

Conclusion: the one supplement that is worth it

If you only want to take one supplement, take creatine monohydrate. It is cheap, well researched, safe and effective – not spectacular, but reliable. Using it is simple: 3 to 5 grams a day, every day, long term. No loading, no cycles, no complicated timing.

And do not forget: creatine amplifies the effect of good training; it does not replace it. Without progressive strength training, enough protein and sleep, even the fullest creatine stores go unused. You will find the fundamentals in the muscle-building guide and in How much protein do you really need?. Which other supplements deserve a place in your cupboard – and which do not – is shown in our supplement pyramid.

Korak za korakom

How to take creatine correctly

1. 1

   Korak 1

   Choose the right product

   Buy pure creatine monohydrate powder, ideally with an independent testing seal. More expensive forms such as creatine HCl or Kre-Alkalyn have no proven advantage.

2. 2

   Korak 2

   Set your dose

   Take 3 to 5 grams a day. If you weigh more than about 90 kg, aim for the upper end.

3. 3

   Korak 3

   Optional: loading phase

   If you want faster effects, take 20 grams a day for 5–7 days, split into four servings of 5 grams, then switch to 3–5 grams a day.

4. 4

   Korak 4

   Take it daily and long term

   Make creatine a fixed daily habit, for example with breakfast or your post-workout shake. Timing is secondary – consistency is what counts.

5. 5

   Korak 5

   Drink enough

   Drink as much as usual, spread across the day. Creatine draws water into the muscle cells; extreme amounts of fluid are not necessary.