What Is Creatine? Benefits, Uses and How It Works

Creatine is one of the most researched supplements in sports nutrition. It is a naturally occurring compound that your body produces and that is also found in foods such as meat and fish.

Most of the creatine stored in the body is found in skeletal muscle, where it plays an important role in the production of energy during intense physical activity.

But what exactly does creatine do, and why is it so widely used by athletes and people who train?

What is creatine?

Creatine is a compound involved in the body's energy system.

Your body produces creatine naturally, primarily from amino acids, and you can also obtain it through your diet. Once available, creatine is stored largely in skeletal muscle in the form of creatine and phosphocreatine.

During intense exercise, phosphocreatine helps regenerate ATP, one of the main energy sources used by muscle cells.

This is particularly relevant during activities that require short, intense efforts, such as weightlifting, sprinting and repeated explosive movements.

What does creatine do?

Creatine supplementation can increase the amount of creatine available in muscle.

Research shows that creatine supplementation can improve performance in activities involving repeated, short bursts of high-intensity effort. It can contribute to improvements in strength, power and the ability to perform repeated maximal-effort muscle contractions.

This is why creatine is commonly used by people who practice:

• Strength training
• Bodybuilding
• Sprinting
• Cross-training
• Team sports
• Other activities involving repeated high-intensity efforts

The response can vary from person to person.

Does creatine build muscle?

Creatine itself is not a substitute for training, adequate nutrition or recovery.

However, by supporting performance during high-intensity exercise, creatine can help people train effectively over time. Research also supports its use alongside resistance training for increasing lean body mass.

The important distinction is that creatine is not a magic shortcut. Its potential benefits are connected to its ability to support training performance and capacity.

Does creatine increase strength?

Yes, creatine supplementation can improve strength and power, particularly during activities involving repeated high-intensity efforts.

The effect is not identical for everyone, but strength and power improvements have been observed in numerous studies.

For someone following a resistance-training program, this can make creatine a useful addition to an overall training and nutrition strategy.

Does creatine cause weight gain?

Creatine can cause an increase in body weight, especially during the early stages of supplementation.

This is primarily associated with increased water retention within muscle tissue rather than simply an increase in body fat.

Therefore, seeing the scale increase after starting creatine does not automatically mean that you have gained body fat.

Over time, changes in lean body mass can also occur when creatine supplementation is combined with appropriate resistance training.

What is creatine monohydrate?

Creatine monohydrate is the most widely used and studied form of creatine.

Other forms of creatine are available, but current evidence has not established that more expensive forms consistently provide superior benefits compared with creatine monohydrate.

For this reason, creatine monohydrate is the form most commonly used in research.

How much creatine should you take?

Research has used several supplementation protocols.

One commonly studied approach is a loading phase of approximately 20 grams per day for 5–7 days, usually divided into several doses, followed by 3–5 grams per day.

Another approach is to take approximately 3–6 grams per day without a loading phase. This can also increase muscle creatine stores, although it takes longer.

The best approach can depend on the individual and their goals. People with medical conditions, those taking medications, teenagers and pregnant or breastfeeding individuals should discuss supplementation with an appropriate healthcare professional.

Does creatine help endurance athletes?

Creatine is particularly well supported for repeated short-duration, high-intensity efforts.

Its benefits appear to be more limited for traditional endurance activities such as long-distance running, cycling or swimming.

That does not mean creatine has no possible relevance to every endurance athlete. However, the strongest evidence is for activities that repeatedly demand high-intensity muscular effort.

Is creatine safe?

For healthy adults, creatine has a strong research record and is generally considered safe when used appropriately. Studies have also examined longer-term use.

Some people may experience gastrointestinal discomfort or muscle stiffness, while weight gain related to water retention is one of the more consistently observed effects.

If you have a medical condition, take medication, are under 18, or are pregnant or breastfeeding, talk to a healthcare professional before using creatine.

Does creatine need to be taken before a workout?

Not necessarily.

Creatine works primarily by increasing and maintaining muscle creatine stores. Therefore, consistent supplementation is more important than taking it at a specific minute before or after training.

This is different from supplements that are intended to produce an acute effect immediately before exercise.

Frequently Asked Questions

What is creatine used for?

Creatine is mainly used to support performance during short, high-intensity and repeated physical efforts. Research has found benefits for strength, power and repeated maximal-effort exercise.

Is creatine a steroid?

No. Creatine is not an anabolic steroid. It is a naturally occurring compound involved in the body's energy metabolism.

Does creatine make you gain fat?

Creatine can increase body weight through increased water retention, particularly early in supplementation. This should not automatically be interpreted as an increase in body fat.

What is the best type of creatine?

Creatine monohydrate is the most widely studied form and is the standard form used in much of the research.

Can women take creatine?

Yes. Research on creatine includes women as well as men. The appropriate use depends on the individual's circumstances and goals.

Can runners take creatine?

Runners can take creatine, but its strongest evidence is for short, intense and repeated efforts rather than traditional endurance performance.

The bottom line

Creatine is a naturally occurring compound that helps support the energy demands of muscle cells.

Its strongest evidence is for improving performance during repeated, short-duration, high-intensity exercise, including strength training, sprinting and other explosive activities.

Creatine monohydrate is the most extensively studied form, and consistent use is more important than trying to find a perfect pre-workout timing strategy.

As with any supplement, creatine works best as part of a bigger picture that includes appropriate training, nutrition, recovery and hydration.

Train smarter. Track your progress. And keep moving.

Sources

• National Institutes of Health — Office of Dietary Supplements, Dietary Supplements for Exercise and Athletic Performance.
• European Food Safety Authority — scientific advice on creatine and short-term, high-intensity repeated exercise.