There is a running joke that the best supplement in any gym is the cheapest one on the shelf, and creatine monohydrate is what the joke is about. It has been studied more than anything else in this category, it costs very little, and it comes in a plain tub that no marketing department has ever been excited about.
It is also the ingredient most likely to be skipped by someone spending three times as much on a proprietary blend, which is why it is worth a proper review rather than a shrug.
The basics
Follow the serving instructions on whatever product you buy; the figures above describe what published protocols have commonly used, not a recommendation from us.
Why it holds up
The evidence base is unusually deep for this category. Most of what this site reviews rests on a handful of small trials. Creatine does not. It has been examined repeatedly, across populations, for decades, with findings consistent enough that sports-nutrition position statements treat it as settled in a way they treat almost nothing else.
The form question has a clear answer. Where most of the category invents new forms to justify new prices, the form with the research behind it is the plain, cheap one. Buying monohydrate is buying the version that was studied. That is a rare situation and worth taking advantage of.
It is cheap enough that the cost-benefit barely needs calculating. At commodity prices, the question of whether it is “worth it” resolves itself for most people.
Purity is checkable. Monohydrate is a commodity chemical, third-party testing on it is straightforward, and certification programmes cover it — relevant for tested athletes, who should still do the batch lookup rather than trusting a brand mark.
The honest caveats
It is not a stimulant and does not feel like anything. This matters more than it should. People buy pre-workout for sensation, and creatine offers none. Expecting one leads to abandoning it before the point at which anything would be measurable.
Water retention is commonly reported, including some intracellular retention which is part of the mechanism rather than a side effect. For anyone weight-classed or judged on appearance at a particular date, that is a real consideration.
Gastrointestinal discomfort happens, more often with large single doses. Splitting or lowering the dose is the usual response, per the instructions on the product.
Response varies between individuals. Not everyone responds to the same degree, and there is no way to know in advance which category you fall into.
It does not replace training or eating. The effect described in the literature is an adjunct to a training stimulus, not a substitute for one — a point that ought to be obvious and often is not.
Anyone with kidney concerns, or taking medication, should raise it with a clinician rather than resolving it from a product page or a forum.
These are supplements, not evaluated by the FDA, not intended to diagnose, treat, cure or prevent any disease. Nothing here is medical advice.
Pros and cons
Verdict
Our recommendation is the least surprising one this site will ever publish. If you are going to buy one thing in this aisle, buy the plain monohydrate, buy it from someone who publishes testing, look up the batch if you compete, follow the label’s serving, and ignore every more expensive form standing next to it. The tub is boring because the ingredient has not needed a rebrand in thirty years.