Creatine may help middle-aged and older adults maintain muscle while losing weight, new research suggests

A randomized, double-blind 12-week study of 64 adults aged 45-65 was published in the Journal of the International Society of Sports Nutrition. Creatine supplementation, particularly in conjunction with exercise and a weight-loss diet, was found to increase lean tissue and strength, as well as lead to a higher reduction in body-fat percentage, researchers discovered. Some cognitive findings were also improved, but those individual cognitive outcomes were explicitly stated as exploratory.

This is a particularly helpful topic because weight loss isn’t just about the number on the scale getting smaller. The real trick is to burn the fat while you keep the muscle.

Creatine and Weight Loss: Can You Lose Fat Without Losing Muscle?

When people begin to lose weight, they usually have one goal.

Reduce the reading on the scale. Alright. But there’s a hitch. When you lose weight, you don’t lose all fat. Some of it might be muscle. And that’s not what most people want.

A new 12-week study published in the Journal of the International Society of Sports Nutrition has put creatine back in the conversation. This time not just for bodybuilding or gym performance, but for maintaining muscle while losing fat.

So, does creatine really help with weight loss?

The answer is a bit more interesting than a simple yes or no.

So what did the new creatine study find?

Researchers looked at 64 healthy adults ages 45 to 65 years.

A number of the participants were placed on an exercise and diet regime intended to lead to weight loss. Other people did not engage in the structured exercise program. Participants were randomly assigned to take creatine monohydrate or a placebo within those groups.

The creatine dose was 10 grams per day divided into two 5-gram servings for 12 weeks.

And the results were intriguing.

Among those who exercised and followed the weight-loss diet, those who took creatine gained more lean tissue and showed greater improvements in strength and endurance.

They also had a greater percentage decrease in body fat than the exercise and placebo group.

That’s one of the main differences. Creatine was not merely rushing the scale’s decline. It appeared to help with body composition.

Fat Loss vs Weight Loss

And this is where the whole conversation turns.

Let’s say two people lose 5 kg each.

Person A loses 4 kg of fat, 1 kg of muscle.

Person B loses 5 kilograms of fat , but maintains all of their muscle .

They both lost 5 kg.

But what they found was completely unique.

That’s why people on diets, especially as they age, should not just look at body weight.

Muscle preservation is key.

Muscle provides strength, movement and physical function. As we get older, keeping muscle becomes more important.

Middle-aged and older adults can lose muscle while trying to reduce body fat, and this was a problem the new study was specifically interested in.

So Does Creatine Really Burn Fat?

Not quite.

This is where we need to watch our language. Creatine is not a classic fat burner. It doesn’t work like a stimulant that is supposed to “melt fat.”

Rather, the new study hints that creatine might aid in supporting lean tissue and training adaptations for individuals engaged in an exercise and calorie-deficit regimen.

This can indirectly make a fat-loss program more effective in terms of body composition.

Think: more muscle kept – less fat lost instead of the creatine = fat burning supplement

Two very different statements.

But what if you take creatine while you’re trying to lose weight?

One thing that can confuse people is the scale of things.

Creatine may increase the amount of water stored in muscle cells. So some people may notice that their body weight goes up a little when they first start taking it. But that does not mean they are necessarily putting on body fat.

That’s why stepping on the scale just once and panicking isn’t all that helpful.

Consider the overall picture:

• Weight of body
• Waist size
• Power
• lean mass or muscle mass
• Trends in body fat
• How your clothes fit.

If you’re losing fat and getting stronger or maintaining your strength, that information is typically much more useful than what the scale says on any given morning.

Does Creatine Work If You Don’t Work Out?

The new study also found an intriguing result here.

Participants who took creatine, even without the structured exercise and diet program, also increased their lean tissue and some measures of strength.

But that’s not a reason to take creatine and then skip the gym.

Exercise remains one of the most important tools to maintain muscle during weight loss.

The researchers found that creatine, as well as resistance and aerobic exercise, led to greater improvements in several strength and body-composition measures.

So the better way to consider it:

Creatine + lifting weights + good nutrition

instead of:

Creatine and exercise.

What About Creatine And Brain Function?

Cognitive function was also assessed in the study.

Some tests indicated that people taking creatine had enhanced memory and processing speeds.

But this is where we have to slow down.

They described the individual cognitive findings as exploratory and said they need confirmation from future studies. This is interesting research.

It isn’t enough to say:

“Creatine is good for your brain.”

That’s too strong for this one study,” she said.

Is 10 grams of Creatine enough?

Not so always. The study used 10 grams per day, which is higher than the common maintenance amounts used in day-to-day creatine supplementation.

That doesn’t mean everybody needs 10 grams of it.

“The study was designed to test a specific intervention in middle-aged and older adults, not to establish a one-size-fits-all dose.

That’s another common error in supplement research. One dose is used in a study. The internet then translates that dose to:

“Everyone should get this much,”

That’s not how science works.

The Bottom Line

This new research provides another interesting reason to consider creatine beyond traditional gym performance.

In adults aged 45 to 65 years who were following an exercise and weight-loss program, creatine supplementation helped increase lean tissue and strength, and was associated with a greater reduction in body-fat percentage.

But let’s keep the assertion realistic.

Creatine is not a fat burner.

Its potential value in weight loss may be more about helping you retain and potentially build lean tissue while losing body fat.

And actually that’s a much more useful way to think about it.

If you want to lose weight don’t just ask:

“How fast can I get the scale to move down?”

Ask:

“How much of the weight I’m losing is actually fat?”

That’s where the difference between just losing weight and improving your body composition comes into play.

References

• Chun J, Liu Y, Kibler GL, et al. Effects of creatine supplementation with and without exercise and diet intervention on body composition, cognitive function, and markers of health in middle-aged and older adults. Journal of the International Society of Sports Nutrition. 2026;23(sup1):2716273.
• Texas A&M University — Study finds creatine’s benefits extend beyond the gym, September 18, 2026.