Creatine: What It Does, What It Doesn't, and How to Take It

Creatine monohydrate is the most researched supplement in sports science history, backed by over 500 studies. It works by increasing your muscles' phosphocreatine stores, letting you produce more ATP (energy) during high-intensity exercise. Take 3-5g daily — no loading phase required, no cycling needed.

If you only take one supplement, this should be it. Not protein powder (you can get protein from food). Not a pre-workout (that's just caffeine in a fancy package). Creatine is one of the few supplements where the research is so overwhelming that the debate is effectively over.

Here's what it does, what it doesn't do, and exactly how to use it.

What Creatine Actually Does in Your Muscles

Think of ATP like a battery. Every time you do a heavy rep, your muscles drain that battery. Between sets, your body recharges it. Creatine helps recharge it faster.

Here's the science in plain English:

Your muscles store energy as ATP (adenosine triphosphate). When you lift heavy or sprint, your muscles burn through ATP in about 8-10 seconds. After that, you're running on fumes — that's why the last reps of a heavy set feel impossible.

Your body has a built-in recharging system called the phosphocreatine system. Creatine stored in your muscles donates a phosphate group to rebuild ATP from ADP (the "dead battery" form). The more creatine you have stored, the faster you recharge between efforts.

Dr. Andy Galpin, professor of exercise physiology, explained this on the Huberman Lab podcast: creatine essentially gives your muscles a bigger energy buffer for short, intense efforts. More stored creatine means more ATP available per set, which means more reps at the same weight or the same reps at a heavier weight.

Why creatine monohydrate is the only form that matters: The supplement industry sells creatine HCl, buffered creatine, creatine ethyl ester, and a dozen other forms — all more expensive. None of them outperform plain creatine monohydrate in research. The ISSN (International Society of Sports Nutrition) position stand states that creatine monohydrate is the most effective and most studied form. Save your money.

The 4 Biggest Creatine Myths — Exposed

Myth 1: "Creatine damages your kidneys"

Reality: This is the most persistent creatine myth, and it's been thoroughly debunked.

When your body uses creatine, it produces creatinine as a byproduct. Creatinine levels in your blood are used as a marker for kidney function — higher levels can indicate kidney stress. But here's the key: creatine supplementation raises creatinine levels because you're processing more creatine, NOT because your kidneys are damaged.

The 2017 ISSN Position Stand on creatine reviewed the entire body of evidence and concluded: "There is no scientific evidence that short- or long-term use of creatine monohydrate has any detrimental effects on otherwise healthy individuals." Studies lasting up to 5 years show no kidney damage in healthy adults.

Dr. Eric Rawson, one of the leading creatine researchers cited in the ISSN position stands, has repeatedly confirmed that creatinine elevation from supplementation is expected and benign — not a sign of kidney stress.

The caveat: If you have pre-existing kidney disease, consult your doctor before supplementing. This applies to virtually all supplements, not just creatine.

Myth 2: "Creatine causes hair loss"

Reality: This myth comes from a single 2009 study on rugby players that showed an increase in DHT (dihydrotestosterone) after creatine loading. DHT is linked to male pattern baldness in genetically susceptible individuals.

The problems with this study:

• It has never been replicated in any subsequent research
• The study didn't measure actual hair loss — only DHT levels
• The DHT increase was within normal physiological range
• The study used a loading protocol (25g/day) that most people don't follow

Greg Nuckols at Stronger By Science reviewed the full body of evidence and concluded there is no meaningful link between creatine supplementation and hair loss. If you're genetically predisposed to male pattern baldness, it will happen regardless of creatine use.

Myth 3: "You need a loading phase"

Reality: A loading phase (20g/day for 5-7 days) saturates your muscle creatine stores faster. But it's not necessary.

Taking 3-5g daily reaches the same saturation level in about 28 days. The endpoint is identical — loading just gets you there 3 weeks sooner. Loading also causes more gastrointestinal discomfort (bloating, cramping) in many people.

Jeff Nippard covered this in his creatine deep dive: unless you need to be fully saturated for a competition in the next week, just take 3-5g daily and let it build up naturally. Simpler, cheaper, easier on your stomach.

Myth 4: "Creatine is a steroid"

Reality: Creatine is not a steroid, not hormonal, and not banned by any sports organization.

Creatine is a naturally occurring compound made from three amino acids (arginine, glycine, and methionine). Your body produces about 1-2g per day. You also get it from food — a pound of red meat contains about 2g of creatine, and fish contains similar amounts.

Supplementing with creatine simply increases your stores beyond what food and natural production provide. It has no effect on testosterone, estrogen, or any other hormone.

How to Take Creatine — The Simple Protocol

This is deliberately simple because it should be.

Timing: Doesn't matter much. Some research suggests slight benefits to post-workout dosing, but the difference is negligible. What matters is taking it every day — consistency beats timing. Take it whenever you'll remember. For what to eat around your workout beyond creatine, see our pre and post workout nutrition guide.

With food: Taking creatine with a meal (especially one containing carbs and protein) improves absorption slightly due to the insulin response. But again — taking it at all is what matters.

No cycling needed: You don't need to cycle on and off creatine. Continuous daily supplementation is safe and maintains saturated stores. Cycling just means you spend time below optimal levels for no benefit.

Creatine Forms Compared

Buy creatine monohydrate in bulk powder form. It's cheap, effective, and backed by decades of research. Everything else is a more expensive version of the same thing — or worse.

Who Should Take Creatine (and Who Should Skip It)

Good candidates:

• Anyone doing resistance training (the primary use case)
• Athletes in high-intensity sports (sprinting, football, basketball, CrossFit)
• People interested in cognitive benefits (emerging research shows creatine supports brain function, especially under stress or sleep deprivation)
• Vegetarians and vegans — this group gets the MOST benefit because their baseline creatine stores are lower (no dietary creatine from meat). Studies show vegetarians experience larger performance gains from supplementation than omnivores.

Consult a doctor first if:

• You have pre-existing kidney disease or reduced kidney function
• You're taking medications that affect kidney function

Insufficient evidence for:

• Individuals under 18 (not necessarily unsafe, but research is limited)

Creatine and Training Performance — Real Numbers

Here's what the meta-analyses actually show when creatine monohydrate is combined with resistance training:

"The weight you gain in the first week is water in your muscles — not fat." This is important to understand. Creatine pulls water into muscle cells, which increases muscle hydration and cell volume. This is a GOOD thing — it makes your muscles look fuller, perform better, and may even support muscle protein synthesis. You'll gain 2-4 pounds in the first 1-2 weeks. This is not fat.

For the other proven nutrition fundamental — protein intake for muscle growth — the combination of adequate protein plus creatine is the evidence-based foundation for supplementation. Everything else is optional.

How MySetPlan Programs for Creatine Users

If you're taking creatine, you can likely handle slightly higher training volumes — the faster ATP regeneration means better recovery between sets and sessions. MySetPlan factors your goals and recovery capacity into your personalized program, with appropriate volume progression whether you're building muscle or training for strength.

The nutrition fundamentals — adequate protein, appropriate calories, and creatine monohydrate — are the foundation. Your training program is the other half. Get both right and the results follow.

Ready to put creatine to work? Take the free quiz and get a program built for your goals.

FAQ

Does creatine actually work for building muscle?

Yes. Creatine monohydrate is the most studied supplement in sports science. Meta-analyses consistently show it increases strength by 5-10%, lean body mass by 1-2 kg, and high-rep performance by 5-15% over 4-12 weeks when combined with resistance training. These are real, measurable improvements confirmed across hundreds of studies.

Is creatine safe for long-term use?

Yes. Studies lasting up to 5 years show no adverse health effects in healthy individuals. The 2017 ISSN Position Stand reviewed the entire body of evidence and concluded there are no detrimental effects of short- or long-term creatine use in healthy people. The elevated creatinine on blood tests is expected and not a sign of kidney damage.

Does creatine cause hair loss?

There is no convincing evidence that creatine causes hair loss. This claim originates from a single 2009 study that showed a DHT increase in rugby players, which has never been replicated. The study did not measure actual hair loss. If you are genetically predisposed to male pattern baldness, it will progress regardless of creatine supplementation.

Should I take creatine on rest days?

Yes. Take 3-5g of creatine monohydrate every day, including rest days. Creatine works by maintaining saturated stores in your muscles over time. Skipping rest days means your stores gradually deplete. Consistency matters more than timing.

How long does creatine take to work?

Without a loading phase, creatine takes about 3-4 weeks of daily 3-5g dosing to fully saturate your muscle stores. With a loading phase (20g/day for 5-7 days), saturation happens within a week. You may notice performance improvements once stores are saturated — typically an extra rep or two on heavy sets.

Can I take creatine with coffee?

Yes. Early concerns that caffeine might block creatine absorption have not been supported by subsequent research. You can take creatine with coffee, pre-workout, or any other beverage. The only thing that matters is taking it daily.

Is creatine worth it for beginners?

Yes. Beginners arguably benefit the most from creatine because they are making rapid strength and muscle gains (newbie gains), and creatine amplifies these adaptations. At roughly $0.05 per serving, it is the cheapest effective supplement available. Start with 3-5g daily from day one.

References

• Kreider, R. B., et al. (2017). International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. Journal of the International Society of Sports Nutrition, 14(18).
• Rawson, E. S., & Volek, J. S. (2003). Effects of creatine supplementation and resistance training on muscle strength and weightlifting performance. Journal of Strength and Conditioning Research, 17(4), 822-831.
• Branch, J. D. (2003). Effect of creatine supplementation on body composition and performance: a meta-analysis. International Journal of Sport Nutrition and Exercise Metabolism, 13(2), 198-226.
• van der Merwe, J., Brooks, N. E., &"; Myburgh, K. H. (2009). Three weeks of creatine monohydrate supplementation affects dihydrotestosterone to testosterone ratio in college-aged rugby players. Clinical Journal of Sport Medicine, 19(5), 399-404.
• Galpin, A. (2023). Creatine and the phosphocreatine energy system. Huberman Lab Guest Series.
• Nippard, J. (2022). The truth about creatine: an evidence-based deep dive. YouTube.
• Nuckols, G. (2023). Does creatine cause hair loss? A comprehensive review. Stronger By Science.