Creatine is the most studied supplement in sports nutrition by a distance, which makes it strange how much confusion surrounds the simplest question about it: how much to take. The confusion is commercial rather than scientific, generated by tubs with loading protocols on the label, influencers with proprietary blends to move, and the internet's general allergy to boring answers. The boring answer, supported by hundreds of trials across three decades, is three to five grams of creatine monohydrate a day, every day. This article explains where that number comes from and settles the questions that orbit it.
Why 3 to 5 grams is the number
Creatine works by topping up phosphocreatine stores in muscle, the rapid-release energy system behind short, hard efforts: heavy sets, sprints, jumps, the last rep that either happens or does not. Muscle can only hold so much: once stores are saturated, extra creatine is simply excreted. The research question is therefore how much daily intake achieves and maintains saturation, and the answer converges on roughly three to five grams for most bodies, with the higher end suiting larger, more muscular people, since stores scale with muscle mass. Diet supplies some background creatine, around a gram a day for meat eaters and effectively none for vegetarians and vegans, which is why plant-based lifters often notice more from supplementing: they start from lower stores. Beyond five grams daily, the evidence shows no additional performance benefit for general use; the surplus leaves via the kidneys, harmlessly in healthy people but also pointlessly, which makes megadosing an expensive way to produce enriched urine.
Loading: faster, not better
The loading protocol, around 20 grams a day split into four doses for five to seven days before dropping to maintenance, comes from legitimate research: it saturates muscle stores in about a week, versus roughly three to four weeks on a steady three to five grams. That is the entire difference. Both routes end at identical saturation and identical benefits; loading just arrives sooner, at the cost of a week of higher doses that give some people bloating and digestive grumbles. Unless you have a competition in a fortnight, the calmer route is simply to start at maintenance and let it build. Nothing about loading is required, and skipping it wastes nothing.
Timing, mixing and the rituals that do not matter
Creatine is not caffeine; it works by accumulation, not by acute effect, so the clock position of your daily dose is close to irrelevant. Studies comparing pre- versus post-workout dosing find differences small enough to be noise, and rest-day doses matter just as much as training-day ones because saturation is the goal. Take it whenever you will remember it, with or without food, stirred into water, juice, a shake or coffee; heat and mild acidity do not meaningfully degrade it in the time it takes to drink, whatever the folklore about coffee killing it claims. Taking it alongside a meal may modestly help uptake via insulin, and settles some stomachs, but this is a refinement, not a rule. The only genuinely load-bearing habit is dailyness, which is best engineered rather than willed: put the tub next to the kettle, the coffee machine or the toothbrush and attach the dose to a habit that already survives busy weeks. A missed day is trivial; a missed month is a restart.
Which form to buy
Creatine monohydrate is the form behind essentially the entire evidence base: the strength gains, the sprint performance, the muscle accrual with resistance training, and the emerging cognitive research. The alternatives sold at a premium, hydrochloride, ethyl ester, buffered, liquid, blends, share a common feature: none has demonstrated superiority over monohydrate in head-to-head trials, and some, notably the ethyl ester, have tested worse. Micronised monohydrate, which is just monohydrate milled finer, mixes more easily and costs little extra, making it the sensible default. Beyond that, look for third-party tested products from established brands, since the supplement market's quality control is otherwise variable; our guide to reading supplement labels covers what the certifications mean.
Safety, kidneys and who should check first
Creatine's safety record at three to five grams daily is exceptionally good across studies running months to years in healthy adults: no evidence of kidney damage, liver harm, dehydration, cramping or the other folk warnings, most of which trace to a misunderstanding. Creatinine, the waste marker used in kidney blood tests, rises slightly when you supplement creatine, because more creatine means more of its breakdown product. That is arithmetic, not injury, but it can make routine kidney results look worse than reality, so tell any clinician ordering blood tests that you take it. The genuine cautions are narrow: anyone with existing kidney disease, on medicines that stress the kidneys, or with a single kidney should ask their clinician before starting, pregnancy and breastfeeding lack good data, and under-18s should route through a professional. Drink normally; forced extra water is tradition, not requirement.
So: three to five grams of plain monohydrate, any time of day, every day, with loading as an optional fast-forward and water weight as an expected passenger. It is one of the few supplements where the evidence is genuinely settled, which is precisely why the marketing has to invent complexity. For what creatine actually does beyond the gym, including the bone and brain research, see our companion piece on creatine's wider evidence, and for who benefits most, our article on creatine for women.