Can Creatine Cut Cancer Risk?

If creatine caused half the problems blamed on it online, I would have stopped recommending it decades ago.

Creatine has been accused of damaging the kidneys, causing dehydration, accelerating hair loss, and producing just about every other side effect social media can dream up. Most of those claims collapse when you look at the research.

One of the more serious accusations is that creatine may increase the risk of cancer. That claim has never been supported by solid human evidence. Now, population research suggests the relationship may run in the opposite direction: People who consume more creatine appear to have a lower prevalence of cancer.

Does that mean your daily scoop is a cancer treatment? No. But the findings should make anyone spreading the “creatine causes cancer” myth think twice.

Creatine’s Safety Record Speaks for Itself

Creatine isn’t some new, experimental ingredient. It’s one of the most thoroughly researched supplements available, with more than 1,000 peer-reviewed papers examining its effects on performance, muscle, health, and safety.

Your body also produces creatine naturally, and you consume it whenever you eat foods such as beef, pork, poultry, or seafood. Most of it is stored in skeletal muscle, where it helps regenerate adenosine triphosphate, or ATP—the immediate energy source your muscles use during hard training.

Creatine monohydrate is also generally recognized as safe for specified food uses, and decades of research show that recommended doses are well tolerated by healthy people. Still, internet rumors persist. That’s why researchers decided to look specifically at the relationship between dietary creatine and cancer.

The Study Found the Opposite of What Critics Claim

Researchers analyzed health and dietary data from more than 7,000 U.S. adults. The study looked specifically at creatine obtained from foods—not creatine supplements.

The results ran directly against the online fearmongering. People who consumed the least dietary creatine had the highest prevalence of cancer, while those consuming the most had the lowest. The highest-intake group got more than 19.8 milligrams of creatine per kilogram of body weight per day. For a 180-pound person, that comes to about 1.6 grams of dietary creatine.

The people consuming the most dietary creatine had the lowest prevalence of cancer—not the highest.

Researchers also found that for every additional milligram of creatine consumed per kilogram of body weight, the rate of cancer was about 1% lower. That doesn’t prove creatine prevents cancer. It does, however, show that the human data don’t support the claim that consuming more creatine increases cancer risk. If anything, the association pointed in the opposite direction.

The finding wasn’t a one-off. A later study expanded the analysis to nearly 26,000 U.S. adults. After the researchers accounted for factors such as age, smoking, alcohol use, body mass index, physical activity, diabetes, and hypertension, higher dietary creatine intake was still associated with lower odds of cancer.

For every standard-deviation increase in dietary creatine intake, cancer odds were about 5% lower. The association was strongest in men, older adults, and people classified as overweight.

Again, this was population research—not a clinical trial—but two large analyses have now produced similar findings. That makes the relationship difficult to dismiss as statistical noise.

Could Creatine Help the Body Fight Cancer?

There are several possible explanations for why creatine could be protective, but this is where we have to be careful.

Creatine plays a central role in cellular energy production. It may also have antioxidant, anti-inflammatory, and immune-modulating effects. Preclinical research suggests that creatine may help power CD8+ T cells, immune cells that identify and attack cancer cells.

But cancer biology is incredibly complex. Tumor cells need energy, too, and different cancers may use creatine and related energy pathways differently. Findings in isolated cells or rodents don’t automatically tell us what a creatine supplement will do in a human body.

That’s why I wouldn’t say creatine “kills cancer cells” or call it a cancer-fighting supplement. We don’t have the controlled human trials necessary to make either claim.

Why Did Anyone Think Creatine Caused Cancer?

Part of the concern came from research on heterocyclic amines. These potentially carcinogenic compounds can form when meat is cooked for long periods at very high temperatures—particularly when it’s charred or blackened.

Because creatine and creatinine in meat can participate in the chemical reactions that produce heterocyclic amines, some people made an enormous leap: If creatine in cooked meat is involved in that process, taking creatine powder must also cause cancer.

That’s not how the chemistry works. Creatine monohydrate mixed into water isn’t being cooked at high temperatures alongside sugars and amino acids. Human research using typical supplemental amounts has not shown that creatine increases the production of carcinogenic heterocyclic amines.

A comprehensive review by an international group of creatine researchers reached the same conclusion: Current evidence does not support the claim that taking 3–5 grams of creatine monohydrate per day increases the risk of primary cancer or metastasis in humans.

Does This Apply to Creatine Supplements?

This is the biggest unanswered question. The population studies estimated creatine intake from food. They did not study people taking 3–5 grams of supplemental creatine monohydrate every day. We therefore can’t assume that a scoop of creatine will reproduce the association seen with dietary intake.

People who eat more creatine-rich foods may also differ in other ways from people who eat less. Their total protein intake, activity levels, muscle mass, overall diet, or access to healthcare could help explain part of the difference. There’s also the possibility of reverse causation. Someone diagnosed with cancer may change their diet, eat less meat, or simply consume less food. Lower creatine intake could therefore be a result of illness rather than a contributor to it.

Those limitations matter. They’re why I’m not telling you to take creatine to prevent cancer.

Should You Keep Taking Creatine?

If you’re a healthy adult taking creatine for strength, muscle growth, exercise performance, or healthy aging, this research gives you no reason to stop.

If you want to make creatine part of your daily routine, my JYM Supplement Science product line offers several options. JYM Creatine+ provides a full 5 grams of creatine from creatine monohydrate and creatine nitrate, along with 500 milligrams of dietary nitrates. If you prefer creatine HCl , it’s available as a standalone powder or in capsules . You can also get 2 grams of creatine HCl in both Pre JYM and Post JYM .

I formulated these products to support strength, power, muscle, and exercise performance—not to prevent or treat cancer. The cancer research is simply reassuring evidence that creatine’s online reputation as a health risk is not supported by human data.

If you currently have cancer, have previously been treated for it, or are undergoing chemotherapy or another medical treatment, discuss creatine and any other supplement with your oncology team. Population research is not a substitute for individualized medical guidance.

My Takeaways on Creatine and Cancer

Does creatine kill cancer cells? We don’t know. These studies didn’t test that.

Does creatine increase cancer risk? The available human evidence says no.

Could higher creatine intake be connected to a lower risk of cancer? The association is promising, and it has now appeared in more than one large population study. But we still need controlled trials before calling creatine a cancer-prevention strategy.

For now, the conclusion is straightforward: Take creatine for its proven benefits. Don’t take it as a cancer treatment—but don’t let social media convince you that it causes cancer, either.

References

Antonio J, Brown AF, Candow DG, et al. Part II. Common questions and misconceptions about creatine supplementation: What does the scientific evidence really show? Journal of the International Society of Sports Nutrition. 2025;22(1):2441760.

Baltic S, Grasaas E, Ostojic SM. Dietary creatine and carcinogenic biomarkers in adult population. Nutrition and Health. 2025;31(1):53–58.

Di Biase S, Ma X, Wang X, et al. Creatine uptake regulates CD8 T cell antitumor immunity. Journal of Experimental Medicine. 2019;216(12):2869–2882.

Jiang J, Zhao H, Chen J, et al. The association between dietary creatine intake and cancer in U.S. adults: Insights from NHANES 2007–2018. Frontiers in Nutrition. 2025;11:1460057.

Ostojic SM, Grasaas E, Cvejic J. Dietary creatine and cancer risk in the U.S. population: NHANES 2017–2020. Journal of Functional Foods. 2023;108:105733.

Pereira RTDS, Dörr FA, Pinto E, et al. Can creatine supplementation form carcinogenic heterocyclic amines in humans? Journal of Physiology. 2015;593(17):3959–3971.

U.S. Food and Drug Administration. GRAS Notice No. 931: Creatine Monohydrate. 2020.

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