Creatine: What the Research Says for Beginners

Creatine has a confusing reputation. Some people think of it as a steroid, others as a miracle muscle-builder, and plenty of people worry about hair loss, kidney damage or bloating. In reality, it's one of the most studied supplements available, and the evidence is fairly clear.

This guide explains what creatine is, what the research shows, how to take it, the common myths, and who should check with a doctor first.

What is creatine?

Creatine is a natural compound made in your body from amino acids and also found in foods such as meat and fish. Most of it is stored in your muscles, where it helps produce energy for short, intense efforts, such as lifting weights or sprinting.

Taking creatine as a supplement increases the amount stored in your muscles. That can help you do slightly more work in each set, for example an extra rep or two, which over weeks and months can add up to more strength and muscle.

Creatine isn't a steroid or a hormone, and it doesn't work like one.

What the research shows

Hundreds of studies have looked at creatine. Reviews of this research generally find that, when combined with resistance training, creatine supplementation:

• Increases strength and power output compared with training alone
• Increases lean body mass more than training alone, partly from muscle and partly from water stored in muscle
• Is well tolerated by most healthy adults at recommended doses

The effects are real but modest. Creatine won't replace consistent training, enough protein and good sleep. Think of it as a small extra, not a foundation. The beginner strength training guide covers the foundations.

Some people respond more than others. Those who eat little meat or fish, such as vegetarians, may see larger effects because their starting levels tend to be lower.

Does creatine help fat loss?

Not directly. Creatine doesn't burn fat. It may help you keep training hard and preserve muscle during a calorie deficit, which supports better body composition. But it can also make the scale go up slightly at first, because of extra water in your muscles.

That's not fat. Water weight vs fat loss explains why the scale can rise even while you're losing fat. If you start creatine during a diet, judge progress by your waist, photos and strength as well as your weight.

How to take it

Choose creatine monohydrate. It's the most researched form, usually the cheapest, and other forms haven't been shown to be better.

• Timing doesn't matter much. Take it at a time you'll remember, such as with breakfast.
• Take it every day, including rest days.
• Mix it with water or any drink, or stir it into food.
• Stay hydrated, as you would anyway when training.

Common myths

"Creatine is a steroid"

It isn't. It's a naturally occurring compound found in food and made by your body.

"Creatine damages your kidneys"

In healthy adults, studies using recommended doses haven't shown harm to kidney function. However, creatine can raise creatinine in blood tests, a marker doctors use to assess kidney function, which can make results look worse than they are. If you're having blood tests, tell your doctor you take creatine. If you already have kidney disease, don't take creatine without speaking to your doctor.

"Creatine causes hair loss"

This concern mostly comes from a single small study that found a rise in a hormone called DHT, which is linked to hair loss in some men. It didn't measure hair loss itself, and the finding hasn't been clearly repeated. Current evidence doesn't show that creatine causes hair loss, but the question hasn't been completely settled. If you're concerned, discuss it with your doctor.

"Creatine makes you bloated and fat"

Creatine draws water into your muscles, not under your skin. Most people gain around a kilogram or so of water weight at first, more with loading. It doesn't cause fat gain.

"Creatine causes man boobs"

There's no good evidence that creatine monohydrate causes breast tissue growth in men. However, some "muscle-building" supplements, sometimes sold near creatine, have been found to contain undeclared steroids or prohormones, which can. That's another reason to choose a simple, tested product.

Choosing a product

Supplements are regulated less strictly than medicines in many countries. To reduce the risk of contamination or inaccurate labels:

• Choose plain creatine monohydrate, not blends with lots of other ingredients.
• Look for third-party testing from a recognised certification scheme.
• Avoid products with hormone-related or bold claims.

We haven't recommended specific creatine products yet. If we do, they'll follow our affiliate disclosure and editorial policy. Protein powder: do you need it? covers similar points about choosing supplements safely.

Do you need creatine?

No. You can build a strong, lean body without it. Consistent strength training, enough protein, a moderate calorie deficit if you're losing fat, daily walking and good sleep matter far more. Creatine is a reasonable, well-studied option once those are in place, if you want a small extra benefit.

The bottom line

Creatine monohydrate is one of the best-researched supplements for strength and muscle. Taken at 3 to 5 g a day alongside regular strength training, it's safe for most healthy adults and can offer a modest boost. It won't burn fat, and it may add a little water weight. Choose a simple, tested product, and speak with a doctor first if you have kidney disease or other health conditions.