Few supplements in the fitness world have earned a reputation quite like creatine. Whether you’re looking to build muscle, improve recovery, or simply lift heavier, creatine’s reputation as one of the most researched and effective performance enhancers is well deserved.
“For good reason,” Kylene Bogden – sports performance dietitian for the Cleveland Cavaliers – told Men’s Health. “Creatine supplements have been found ‘to improve strength, enhance recovery, and increase stores of lean muscle mass.’”
But with shelves stocked full of powders and pre-workouts, a familiar question always pops up: When’s the best time to take it? Experts weigh in on how creatine works, what it does for your body, and when exactly to add it to your routine for the biggest gains.
What Is Creatine?
In simple terms, creatine is your body’s backup energy system. It’s a naturally occurring compound made from three amino acids — methionine, arginine, and glycine — and stored in muscle cells as phosphocreatine, which helps regenerate ATP, the body’s main source of energy during explosive activity.
“Creatine is a natural compound made up of three amino acids: methionine, arginine, and glycine,” explains Robert Iafelice, nutrition expert at SETFORSET, told Men’s Health. “About half of our requirement for creatine is obtained from foods such as meat, seafood, and poultry (vegan diets are very low in creatine); the other half is synthesised by the body.”
“Specifically, when ingested, creatine links with phosphorus to form phosphocreatine and is stored in muscle cells. Phosphocreatine is then used to regenerate energy (in the form of ATP) to fuel muscles during all-out exertion,” adds Iafelice.
The result? More ATP equals more explosive power — perfect for short bursts of effort like weightlifting, sprinting, or HIIT.
“Our bodies create about one to two grams per day. Supplements can increase creatine levels up to 40 percent in athletes,” says Iafelice. “Creatine supplementation has been shown to gain better performance in the gym via increased weight and/or more reps, resulting in greater muscle gains. It can also help improve speed in cardiovascular training.”
Creatine even offers cognitive perks: “Creatine has been shown to improve memory and cognitive function,” he adds. “Apart from reducing mental fatigue, creatine has antioxidant and neuroprotective properties.”
Benefits
There’s a reason creatine has become a gym bag essential. Decades of research back its ability to:
- Increase muscle mass by enhancing water retention and protein synthesis within muscle cells.
- Boost strength and power for explosive exercises like deadlifts and sprints.
- Improve recovery between sets and sessions.
- Enhance brain function and protect against cognitive decline.
- Support longevity by slowing the loss of lean mass as you age.
“Combined with weight training, creatine slows the loss of bone mass as you age and could ease the effects of osteoarthritis,” reports Men’s Health.
That said, experts remind users it’s not magic dust. Andreas Kasper, performance nutritionist at England Rugby, explained to Men’s Health: “Creatine monohydrate supplementation is not a magic powder that turns fat mass into muscle mass.”
He adds: “Dosing with creatine can help increase our muscles’ store of the metabolite, which is linked with repeated bouts of high intensity performance such as sprinting and lifting weights… However, you still have to lift the weights and bigger muscles do not always equal increased strength.”
Side Effects
Creatine is among the safest supplements available, but it can cause some temporary changes in your body.
“Creatine supplementation can lead to 2-4lbs of weight gain in a week – your muscles retain water in order to heighten protein synthesis,” said Kasper. “But this is nothing to worry about, especially for everyday athletes.”
However, this water retention can have a negative impact in certain sports that restrict weight, “such as endurance cycling or swimming”, Kasper revealed.
Concerns around cramping or kidney issues have largely been debunked. Research from Arkansas State University found that 5g/day of creatine had no effect on injury or cramping among American footballers over three years. Similarly, long-term studies show no link between creatine and kidney problems in healthy individuals.
It’s also calorie-free, meaning it won’t affect fat metabolism or body composition negatively. As Kasper noted: “By supplementing creatine, you’ll gain weight. But the added weight will help your muscles feel bigger, fuller and stronger.”
When Is The Best Time To Take It?
This is where things get interesting — because even the experts don’t entirely agree.
Research suggests there may be a slight edge to taking creatine post-workout, but consistency is the real key.
“When digging into this topic, you may come across conflicting research with most of it recommending taking creatine right before exercise or immediately after,” said Bogden. “However, at the end of the day, consistency is key. It is significantly more important to focus on not missing your daily supplement of creatine versus focusing on when to take it. In a nutshell, regular consumption is what leads to increased muscle stores.”
For those who want a small performance advantage, post-workout may still have benefits. “The benefit of taking creatine post-workout is that muscle cells have a greater affinity for uptake of creatine after exercise,” said Iafelice. “Exercise causes muscle cells to have a heightened sensitivity for nutrients, including creatine. The supplemental creatine is thus stored for use at the next workout.”
Others take it pre-workout for the energy boost. Creatine increases ATP availability, meaning more power for your sets and potentially shorter rest times. Still, as Men’s Health concludes:
“It doesn’t matter too much when you use it or what you mix it with. In short, creatine is a multi-purpose supplement that has a number of benefits for both physical and mental performance. It’s cheap, it’s safe and it works.”
As Bogden puts it: “It is significantly more important to focus on not missing your daily supplement of creatine versus focusing on when to take it.”
Additionally, Heathline adds: “On workout days, research shows that it may be better to take creatine shortly before or after you exercise, rather than long before or after.
“On rest days, it may be beneficial to take it with food, but the timing is probably not as important as on exercise days.”
Most experts agree: 3–5 grams a day is enough to maintain saturation. Creatine monohydrate remains the gold standard, with no alternative proving consistently superior.
So if you’re serious about training, the best time to take creatine might just be — whenever you’ll remember to take it.
Featured image credit: Pexels/Tima Miroshnichenko/Towfiqu Barbhuiya
