Creatine

Creatine is the most studied supplement in sports nutrition, and one of about three that survives contact with the evidence. It is also the one people overthink hardest — loading protocols, timing windows, exotic forms, cycling schedules. Almost none of that matters.

What matters is taking three to five grams of creatine monohydrate every day.

What creatine actually does

Your muscles run the first few seconds of any hard effort on phosphocreatine, a stored fuel that regenerates ATP faster than any other pathway. Supplementing raises the size of that store by roughly 20 to 40 percent depending on where you started.

The practical result is not that you get stronger. It is that you get one or two more reps before the set ends, session after session. Across a training block that extra volume accumulates into measurably more muscle and more strength — the 2003 meta-analysis put the effect at around 1.4 kg of additional lean mass over typical study lengths, and two decades of subsequent work has not overturned it.

Vegetarians and vegans tend to respond most, because dietary creatine comes from meat and fish and their baseline stores are lower.

How much creatine should you take

Three to five grams daily. That is the whole protocol.

Muscle creatine stores have a ceiling. Once they are saturated, additional intake is oxidised and excreted — you are producing expensive urine. Larger athletes carrying more lean mass sit at the top of the range; some studies scale the dose to 0.1 grams per kilogram of body weight, which lands most people between 6 and 9 grams. For the overwhelming majority, 5 g covers it.

Take it on rest days too. You are maintaining a saturated store, not fuelling a session.

Do you need a loading phase

No, and the maths is simple.

Load at 20 g daily, split into four doses, and you saturate in five to seven days. Take 3–5 g daily and you saturate in three to four weeks. The final saturation level is the same either way. Loading buys you about three weeks, at the cost of the gastrointestinal discomfort that high single doses cause in a minority of people.

Load if you have a competition in a fortnight. Otherwise skip it.

When to take creatine

Whenever you will actually remember.

Creatine is not a pre-workout stimulant. Nothing happens in the session because you took it forty minutes earlier — the effect comes from a muscle store that has been full for weeks. The studies comparing pre- and post-workout dosing find differences small enough that they disappear between trials.

Attach it to a habit you already have. Coffee, breakfast, the same shelf as your keys. Adherence is the only timing variable that has ever mattered.

Does creatine make you gain weight

Yes, and it is the wrong thing to worry about.

Expect one to two kilograms in the first two weeks. Creatine is osmotically active, so drawing more of it into the muscle cell pulls water in with it. That water sits inside the muscle, which is the opposite of the puffy, soft look people are picturing when they ask this question.

If you are cutting, this shows up as a stall on the scale that has nothing to do with fat loss. Track your waist and your photos instead for those two weeks, or start creatine after the cut rather than during it.

Creatine for women

Same dose, same evidence, same answer.

Women generally start with lower baseline muscle creatine, which in principle means more headroom to gain. Trials in premenopausal women show the expected strength and lean-mass improvements, and the more recent work in postmenopausal women is where it gets genuinely interesting — that population is losing muscle and bone density, and creatine alongside resistance training addresses both.

The bloating fear is the sticking point for most women considering it, and it is based on a misunderstanding of where the water goes.

Is creatine a steroid, and is it safe

Creatine is an amino acid derivative. Your liver and kidneys make about a gram of it a day, and you eat roughly another gram if you eat meat. It has no structural relationship to testosterone or any anabolic steroid, and no sporting body bans it.

Safety is where the evidence is strongest, because the supplement has been studied for so long. Trials running up to five years in healthy adults find no adverse effect on kidney function, liver function, or hydration status. The ISSN position stand is unusually blunt on this point.

One genuine caveat: creatine supplementation raises serum creatinine, the marker clinicians use to estimate kidney function. Your kidneys are fine; the test just reads high. Tell your doctor you take it before a blood panel, and if you have diagnosed kidney disease, clear it with them first.

Monohydrate versus HCl, gummies and the rest

Buy monohydrate.

Every other form on the shelf — hydrochloride, ethyl ester, buffered, liquid, magnesium chelate — exists to solve a problem monohydrate does not have. The marketing claim is superior absorption. Monohydrate is already absorbed at close to 100 percent, so there is no gap to improve on, and none of these forms has shown superiority in a head-to-head trial on muscle creatine content.

They cost more, and they are the forms least likely to have been third-party tested.

Creatine gummies are the current version of this. They are monohydrate with sugar and a manufacturing step, and independent testing has repeatedly found brands delivering less creatine than the label claims because the compound degrades in that format. If you like them, check for third-party assay results specifically — not just a generic quality seal.

Look for the Creapure designation or a certificate of analysis. Plain monohydrate powder costs a few cents a serving.

Who should skip it

Roughly nobody, but with three honest exceptions. Anyone with diagnosed kidney disease should not start without medical sign-off. Anyone in a weight-class sport close to a weigh-in should account for the water. And anyone who is not training regularly is buying a supplement that amplifies training they are not doing.

Creatine does not build muscle. It lets you do slightly more of the work that does.

Side effects and who should skip it

• Water retention inside the muscle cell during the first two weeks, typically 1–2 kg on the scale. It is not fat and it is not subcutaneous bloat.
• Gastrointestinal discomfort, almost always from taking more than 10 g at once or from undissolved powder. Split the dose and use warm water.
• People with existing kidney disease should not start creatine without clearing it with their physician — not because it causes kidney damage in healthy people, but because it raises serum creatinine and complicates monitoring.