Article
Creatine supplementation: what the evidence supports and what it does not
A practical review of creatine monohydrate, common dosing strategies, safety considerations, and when it may be useful.
Creatine is one of the most studied supplements in sports nutrition. Even so, it is still surrounded by myths: that it harms the kidneys, that it is only for “gym bros,” or that it is almost mandatory for anyone who exercises. The reality is more practical and more nuanced.
What creatine actually is
Creatine is a compound the body produces from amino acids, and it is also obtained in small amounts from foods such as meat and fish. Most of it is stored in muscle as phosphocreatine, a system that helps regenerate energy quickly during short, intense efforts.
That is why creatine is usually studied in settings such as:
- resistance training
- sprinting or repeated high-intensity efforts
- sports with frequent changes of pace
- programs focused on strength and lean mass gains alongside training
Where the evidence is strongest
The best-studied form is creatine monohydrate. Both the International Society of Sports Nutrition position stand and more recent summaries agree that it can improve work capacity during intense efforts and support greater training adaptations when paired with resistance exercise.
That does not mean it magically overrides training quality, sleep, or overall nutrition. It means that, in the right setting, creatine can provide a small but meaningful advantage that has been repeatedly documented.
In practice, it often makes the most sense to consider it when a person:
- trains for strength or power consistently
- wants to improve performance across repeated sets or short bursts
- is trying to support muscle gain or muscle maintenance
- eats little meat or fish and may start with lower dietary creatine intake
What it should not be sold as
Not everyone responds the same way. It is also not a supplement that every person needs.
It should not be framed as if it:
- replaces a well-designed program
- drives fat loss on its own
- works equally well for pure endurance performance
- belongs in every consultation by default
The strongest evidence remains in strength, power, and repeated high-intensity work. Outside those contexts, benefits may be smaller or less consistent.
Common dosing approaches
Two practical approaches are commonly used:
- Optional loading: 20 g per day split into 4 doses for 5 to 7 days, followed by maintenance.
- Simple maintenance: 3 to 5 g per day.
For most people who want a consistent and simple routine, 3 to 5 g per day is enough.
If gastrointestinal discomfort shows up, it is worth checking:
- overly large single doses
- poor dissolution
- low-quality products
Safety: where reassurance is reasonable and where caution still matters
In healthy people, the available literature does not support the idea that creatine monohydrate harms kidney function when used within typical recommended doses. That still does not mean it should be suggested without context.
More caution is reasonable if the person:
- already has kidney disease or relevant renal history
- is pregnant or breastfeeding
- uses many supplements or medications without supervision
- expects unrealistic outcomes and is trying to replace basic habits with supplements
One practical point worth explaining well: creatine can increase body weight early on because of changes in intracellular water. That is not the same thing as gaining body fat.
A more useful way to explain it
If your goal includes strength, repeated high-intensity performance, or support for muscle gain, creatine monohydrate is one of the supplements with the strongest evidence. It does not replace your plan, but it can complement it well.
Final takeaway
Creatine is neither a miracle nor a problem to fear. It is a tool with strong evidence when the context is right. If the person does not yet have a solid foundation of training, sleep, and nutrition, that still comes first. But if that base is already there, creatine monohydrate can be a reasonable addition.