Creatine is one of the most talked-about supplements in the gym, and also one of the most misunderstood.
This page explains what it actually is, how it works in your body, what people use it for and where it comes from, and it settles the most common myth: no, creatine is not a steroid.
Key points
- Creatine is a natural compound your body makes and also gets from foods like red meat and fish.
- It fuels short, intense effort by helping muscles rapidly recharge their energy supply.
- It is used mainly to support strength, power and muscle growth in training.
- Most people take creatine monohydrate, the most researched and most affordable form.
- Creatine is not a steroid and does not alter your hormones.
What is creatine?
Creatine is a natural compound your body uses to produce quick energy for short, intense effort such as lifting and sprinting. It is built from amino acids in the liver, kidneys and pancreas, stored mainly in skeletal muscle, and also eaten in foods such as red meat and fish. As a supplement it is usually taken as creatine monohydrate, which is the most researched and most affordable form (Antonio et al., 2021).
Roughly 95 per cent of the creatine in your body is held in skeletal muscle, where it sits ready to be used the moment you need a burst of power (Kreider et al., 2017).
Because it is something your body already makes and stores, supplementing simply tops those stores up to their natural ceiling. For a deeper look at what that extra creatine does for training, see our guide to creatine benefits.
How does creatine work?
Creatine works by helping your muscles rapidly regenerate ATP, the molecule that fuels muscular contraction. During short bursts of hard effort your cells spend ATP faster than they can rebuild it. Stored creatine, held as phosphocreatine, donates a phosphate group to recharge ATP within seconds, so you can push harder for a few more reps or a longer sprint before fatigue sets in.
This is why creatine helps most with short, explosive work rather than long, steady cardio. The fuller your muscle stores, the more phosphocreatine is on hand to keep energy flowing during those first intense seconds of a set or sprint. Topping up your stores through diet or a supplement is what raises that ceiling.
What is creatine used for?
Creatine is used mainly to support strength, power and muscle growth during resistance training and high-intensity exercise. It is shown to support greater training output, which over time may support gains in lean muscle. Research also points to possible roles in recovery and brain function, though the evidence for muscle and performance is the strongest. A typical maintenance dose is 3 to 5 grams a day (Kreider et al., 2017).
Most people take it as a creatine monohydrate powder such as Emrald Labs Creatine Monohydrate, mixed into water or a shake. It also comes in capsule form if you prefer to skip the mixing. You can browse the full range in our creatine monohydrate collection. For a plain-English rundown of the effects, read creatine benefits.
Where does creatine come from?
Creatine comes from two sources: your own body and your diet. Your liver, kidneys and pancreas make creatine from the amino acids arginine, glycine and methionine.
You also get it from animal foods, mainly red meat and fish, because plant foods contain almost none. The body needs to replenish roughly 1 to 3 g of creatine per day, about half from endogenous synthesis and half from the diet, and vegetarians and vegans typically have lower baseline muscle creatine stores (Kreider et al., 2017).
Why food alone falls short
The catch with food is dose. You would need to eat a very large amount of raw red meat to match a single supplement serve, and cooking reduces the creatine content further. That is why a monohydrate powder is a simple, low-cost way to reach a consistent daily intake without loading up on meat.
Is creatine a steroid?
No. Creatine is not a steroid. It is a natural compound found in food and made in your body from amino acids, and it works by helping muscles produce energy. Anabolic steroids are synthetic hormones related to testosterone that act in a completely different way. Creatine does not alter your hormones. It is one of the most studied sports supplements and is permitted in drug-tested sport (Kreider et al., 2017).
The confusion is understandable, because both are associated with getting bigger and stronger, but the mechanism could not be more different. Steroids change hormone levels; creatine simply refills a natural energy store your muscles already use. If you are weighing up whether it suits you, our guide to creatine side effects covers safety and common concerns in more detail.
Where to next
- Shop the full range: creatine supplements
- What it does: creatine benefits
- Is it safe: creatine side effects
- Powder or capsules: creatine capsules
References
- Kreider RB, et al. International Society of Sports Nutrition position stand on creatine supplementation. J Int Soc Sports Nutr. 2017;14:18. PMC5469049
- Antonio J, et al. Common questions and misconceptions about creatine supplementation. J Int Soc Sports Nutr. 2021;18:13. PMC7871530
This article is for general information only and is not medical advice. Creatine is a dietary supplement, not a treatment for any medical condition. If you are pregnant, breastfeeding, taking medication or managing a health condition, speak to your GP or a qualified health professional before starting any supplement.
