7 Myths You’ve Heard About Creatine That Aren’t Actually True, According to Experts

If there’s one supplement on everyone’s lips, it’s creatine. But, with all the talk about this well-studied supp that was once for gym bros and is now beloved by, well, everyone, it can be hard to separate fact from fiction.

Creatine is a compound your body makes naturally from three amino acids called arginine, glycine, and methionine, but you can also get small amounts from meat and fish, says Kristin Kirkpatrick, RDN, a dietitian at the Cleveland Clinic Department of Wellness and Preventive Medicine. “I like to describe it as the power plant for your cells,” she says. “It helps regenerate adenosine triphosphate (ATP), the energy molecule your muscles and brain rely on for quick, high-intensity work.” Without it, your movements won’t be as explosive in the gym, and you may take longer to recover, as Women’s Health reported previously.

The body produces about half of the creatine it needs, and the rest has to come from diet—or supplements. But as creatine’s popularity has exploded, so has the misinformation surrounding it. We asked experts to debunk some of the most persistent myths about the supplement. Here’s what they said.

Meet the experts: Jay Luthar, MD, is an internal, integrative, and lifestyle medicine physician and a professor at Harvard Medical School. Kristin Kirkpatrick, RDN, is a dietitian at Cleveland Clinic Department of Wellness and Preventive Medicine.

Myth #1: You need to “load” creatine.

The truth: Only if you need results fast.

You may have heard that when you first start taking creatine, you should do what’s called a loading phase—which is taking about four times the regular dose for up to a week—to saturate your muscle stores with the supp.

A standard dose of creatine is 3 to 5 grams per day; a loading phase calls for about 20 grams per day, split into four doses, Kirkpatrick explains. Why four doses? “Essentially, there’s a ceiling on how much creatine the gut can absorb and deliver to muscle at any one time,” says Jay Luthar, MD, an internal, integrative, and lifestyle medicine physician and professor at Harvard Medical School. “Taking 20 grams at once doesn’t mean 20 grams reaches your muscles; it means a portion gets excreted, and you likely experience GI discomfort in the process.”

The idea is that a loading phase fills your muscles' creatine stores faster—in about a week—but it’s totally unnecessary for most people. An athlete who wants results before an upcoming competition may benefit, for example, but if you don’t have anything timely on the calendar, you can skip the load completely, Kirkpatrick says. Doing so might also save you from bloating and stomach upset and other side effects that most often cause people to stop taking the supp. “A steady daily dose is simpler, easier on your body, and just as effective over time,” Kirkpatrick says.

Myth #2: Creatine makes you bloated.

The truth: If it does, it shouldn’t last long.

This one is partly true—but stay with us. Creatine works by drawing more water into your muscles, which means that it’s possible you may experience some bloat at first. Key words: At first. Research in the Journal of the International Society of Sports Nutrition from 2021 found that creatine does not cause long-term water retention.

“In the initial few weeks, creatine draws water into muscle cells,” Dr. Luthar says. “That means the bump on the scale is evident, but it’s water weight—not fat. Once muscle saturation is reached and you transition to a maintenance dose, this stabilizes.” As for how long that takes? About two to four weeks, he says.

Also keep in mind that your dosage and creatine type matter. “The bloating and stomach discomfort people complain about are usually tied to large doses of creatine monohydrate, especially during a loading phase,” says Kirkpatrick. “Creatine monohydrate isn't very soluble, so large amounts can sit in the gut and cause GI distress.” If this is a concern, Kirkpatrick recommends creatine HCl, which is much more soluble and better absorbed, so it works at a smaller dose. That means less bloating, less stomach upset, and less water retention, with the same benefits creatine is known for.

Myth #3: Creatine is only for bodybuilders.

The truth: There are plenty of uses for it outside of the gym.

For years, creatine was relegated to lifters, but now there is research showing benefits far beyond the gym. “We now have strong evidence that creatine supports healthy aging and muscle preservation during weight loss,” says Kirkpatrick.

For example, a new study in the Journal of the International Society of Sports Nutrition found that adults ages 45 to 65 gained lean tissue and strength on creatine without a structured exercise program. “That's why I see interest [in creatine] from people who have never lifted a weight: midlife women, older adults, people on GLP-1 medications, and anyone thinking about longevity,” says Kirkpatrick.

Plus, endurance athletes can see some perks from the supplement too. Emphasis on some. Although creatine doesn't appear to improve aerobic capacity, meaning it won't make you a faster marathoner on its own, endurance athletes can still see benefits when their sport includes explosive movements like sprints, surges, or hill climbs, as well as in the strength training they do to support injury prevention, per a 2023 systematic review and meta-analysis in Sports Medicine.

“Creatine’s primary mechanism is supporting short-burst, high-intensity energy production, which isn’t the primary energy system in steady-state endurance events,” Dr. Luthar says. “That can make it useful if a marathon runner, for example, is doing weekly sprint workouts to improve speed. It might have less of an impact on a weekly long run or three-hour cycle ride.” There’s also interesting emerging evidence that creatine helps reduce recovery time between workouts, shares Dr. Luthar. For endurance athletes and lifters alike, this could be another potential benefit.

Myth #4: Creatine is only for men.

The truth: Women can benefit from creatine too.

Some of the most exciting creatine research is happening outside the weight room, especially for women. First, a few facts to keep in mind, per Kirkpatrick: Women naturally store less creatine than men, and beginning around age 30, we lose 3 to 8 percent of our muscle mass every decade, with the loss accelerating after 50. The good news is that creatine supplementation has been shown to support strength, muscle, and recovery in women at every life stage, particularly when paired with resistance training, according to a 2021 study published in Nutrients.

Build muscle with the WH+ Strength After 50 Plan.

Another emerging area of creatine research in women deals with menopause. Perimenopausal women have measurably lower brain creatine levels, and those deficits are linked to difficulty concentrating, according to recent research in Nutrients. And, although a lot more studies are needed, it’s possible supplementation could help with that. A 2025 randomized controlled trial published in the Journal of the American Nutrition Association found that eight weeks of low-dose creatine HCl improved cognitive function and brain energy metabolism in perimenopausal and menopausal women.

Estrogen loss associated with menopause also accelerates muscle loss (which is why women start to see a steeper decline in their 50s), so creatine could potentially help both mentally and physically, as noted by a 2025 study published in the Journal of the Society of Sports Nutrition International. Just keep in mind: Though creatine has benefits for women, that doesn’t mean that we need gender-specific formulations.

Myth #5: When you take creatine matters a lot.

The truth: This supp is pretty flexible.

Consistency matters far more than the timing of your creatine intake, says Kirkpatrick. “Creatine works by gradually filling and maintaining your muscles' stores, so what counts is taking it every day, including rest days.”

You don’t need to be super exact on when you take it every day, either. Creatine works through muscle saturation maintained over time, so if you miss your usual window by a few hours, there won’t be a huge effect on stores, says Dr. Luthar.

Kirkpatrick’s advice is to stack creatine onto something you already do every day—just maybe not your morning coffee. When mixed with hotter liquids, creatine powder may become ineffective, so it’s best to stick to room temperature or cool liquids.

Myth #6: Creatine damages healthy kidneys.

The truth: Research found no effect on kidneys.

This myth comes from a bit of a misunderstanding. Creatine gets broken down into creatinine, which is often measured in routine bloodwork as an estimate of kidney function. Elevated levels of creatinine can indicate an issue with kidney function. But, if you’re taking a creatine supplement, you may have elevated levels of creatinine simply because you’re taking in extra amounts—not because your kidneys aren’t functioning well. For that reason, Kirkpatrick says to tell your doctor you take creatine before bloodwork, so a slightly higher creatinine number is interpreted correctly.

When researchers looked into the relationship between creatine and kidney health, they found that creatine did not harm kidney function, per a 2026 meta-analysis of 26 randomized controlled trials published in International Urology and Nephrology.

Overall—for a supplement—creatine is pretty low stakes. “It's one of the most researched supplements available, with a strong safety record,” Kirkpatrick says. A 2025 analysis published in the Journal of the International Society of Sports Nutrition evaluated 685 human clinical trials and found no significant difference in reported side effects between creatine and placebo. That said, you should talk to a doctor before taking any new supplement, especially if you have kidney or liver disease, diabetes, or bipolar disorder, or are pregnant or breastfeeding. (For individuals diagnosed with bipolar disorder, Kirkpatrick says there is some preliminary research suggesting that creatine supplementation may increase the risk of manic or hypomanic episodes.)

You’ll also want to choose a brand that is third-party tested, since supplements aren’t regulated like medications. (You can find our recs here.)

Myth #7: Creatine is a must.

The truth: You’ll be just fine without it.

No supplement is a must—and that includes creatine. Kirkpatrick says you can absolutely build strength and muscle without it. “Consistent resistance training, enough protein, adequate sleep, and a well-balanced diet will always do the heavy lifting,” says Kirkpatrick. “Creatine is just the add-on, not the foundation.”

That said, Kirkpatrick thinks it deserves the love it gets, particularly when we look at the growing body of research surrounding its benefits. “What makes creatine particularly exciting is the strong evidence supporting its role in muscle strength, performance, and recovery, along with emerging research exploring potential benefits for brain health and cognitive function,” says Kirkpatrick. “For most healthy adults, creatine is considered safe when taken at recommended doses. While the research is especially compelling for muscle health, I think the potential applications for healthy aging make this an exciting area of nutritional science.”

Dr. Luthar agrees and says that creatine is backed by decades of sports nutrition research, including a fair number of studies with human participants. Still, the supplement has taken social media by storm and the hype is taking on a life of its own. “Some of the benefits posted online are exaggerated or incorrect, which is why it’s best to discuss creatine or any supplement with a health care provider before taking it,” he says.