Creatine Guide: Benefits, Dosage & Best Picks

What Creatine Is and How It Works

Creatine is a compound your body makes from amino acids and stores mostly in your muscles. You also get some from red meat and fish. Inside the muscle it's stored as phosphocreatine, which your body uses to quickly regenerate ATP, the energy behind short, hard efforts like a heavy set, a sprint, or a jump.

A creatine supplement tops up those stores beyond what diet alone provides. With more phosphocreatine on hand, you can squeeze out an extra rep or two, hold power for longer, and recover faster between sets. Over weeks and months, that extra training volume is what adds up to more strength and muscle.

Benefits

Creatine has more research behind it than any other sports supplement. In people who train, it consistently:

• Increases strength and power output, especially in lifting and sprint-type exercise
• Supports gains in lean muscle when combined with resistance training
• Improves recovery between sets and between hard sessions
• Helps high-intensity performance in sports with repeated bursts of effort

Researchers are also studying creatine for brain health, healthy aging, and muscle and bone in older adults. The early results are encouraging, but the strongest evidence is still for training performance.

How to Take It

You don't need a complicated protocol:

• Take 3–5 g of creatine monohydrate every day. That's all most people need.
• Loading is optional. About 20 g a day, split into four doses, for 5–7 days fills your muscles faster. A steady 3–5 g gets you to the same place in three to four weeks, with less chance of an upset stomach.
• Timing matters very little. Taking it after training may have a slight edge, but consistency matters far more. Mix it into water, a shake, or a meal, whenever you'll remember. More in when to take creatine.

New to it? Start with creatine for beginners.

Who Should Take It

Creatine is useful for almost anyone doing resistance training or high-intensity sport: lifters, sprinters, team-sport athletes, and people doing HIIT. Vegetarians and vegans often see a bigger response because they get little creatine from food. It's also increasingly studied in older adults who want to hold on to muscle and strength.

It's less useful for pure endurance training, like long steady runs, where short bursts of power matter less.

Side Effects and Safety

At the recommended dose, creatine has an excellent safety record in healthy adults, including long-term studies. The most common effects are:

• A little water weight in the first few weeks, stored inside the muscle
• Stomach discomfort at large single doses, which you avoid by sticking to 3–5 g or splitting a loading dose

Creatine doesn't damage healthy kidneys, but it can raise creatinine on a blood test, so tell your doctor you take it. If you have kidney disease, are pregnant, or take medication, check with your doctor first. For the full picture, read is creatine safe?

Our Top Picks

We rank creatines on purity, testing, dose, and value. See the full list in our cleanest creatines ranking, or the brand-vs-brand reviews above.