What Is Creatine Really Doing to Your Brain? Dr. Darren Candow Explains

Steven Bartlett sat down with Dr. Darren Candow on The Diary of a CEO and asked the question most creatine users never think to ask: what is this stuff actually doing to your brain?

Dr. Candow is not a supplement influencer. He is a professor and Director of the Aging Muscle and Bone Health Laboratory at the University of Regina, has published over 175 research papers on creatine specifically, is a fellow and incoming Vice-President of the International Society of Sports Nutrition, and was named to Stanford University's Top 2% Scientists list in 2025. When someone with that record spends 75 minutes explaining why your 5-gram scoop might be doing far less for your brain than you think, it is worth paying attention.

You can watch the full interview below, and we've broken down everything he said against the published research underneath it.

Here is what he actually said, what the published research backs up, and what it means for how you should be taking creatine.

Myth 1: Creatine Damages Your Kidneys

This is the myth that stops more people from starting creatine than any other. Dr. Candow's answer is direct: there has never been a randomized controlled trial showing creatine causes kidney damage in healthy adults.

What actually happens is a false positive. Creatine breaks down into creatinine, and standard kidney function tests (eGFR) use creatinine as their marker. Take creatine, and your creatinine reads slightly elevated on bloodwork — even though your kidneys are functioning perfectly normally. Stop supplementing, and the marker returns to baseline within days. Dr. Candow's practical advice: tell your doctor you're supplementing with creatine before your annual bloodwork, so a false alarm doesn't turn into an unnecessary follow-up.

Myth 2: Creatine Causes Water Retention and Bloating

There is a kernel of truth here, but the context matters enormously. A loading phase — 20 to 30 grams a day for five to seven days — can cause temporary water retention. On a standard maintenance dose of 3 to 5 grams daily, this effect is minimal to nonexistent.

More importantly, the water that does get pulled in is intramuscular, not the bloated, puffy retention people imagine. That water volumizes the muscle cell itself, which may actually stimulate protein synthesis. This is the same underlying mechanism we've covered before: creatine needs sodium to transport efficiently into your cells, and when that transport works correctly, the water goes where it's supposed to go — inside the muscle, not pooling uncomfortably around it.

Myth 3: Creatine Is Only for Men

The data says otherwise. Women show robust responses to creatine supplementation across strength, endurance, lean mass, and body fat reduction. Bone health benefits are also well documented in female-specific trials. If you've been skipping creatine because you assumed it was a "bro" supplement, the research doesn't support that assumption at all.

Myth 4: Creatine Causes Hair Loss

This myth traces back to a single rugby study where DHT (a hormone linked to hair loss in genetically predisposed individuals) rose slightly during creatine supplementation — but stayed within normal biological range, and no actual hair thinning was measured. A more recent controlled trial using 5 grams daily for six to eight weeks found no effect on hair whatsoever. One small, frequently misquoted study built an entire myth that still circulates online today.

Myth 5: Creatine Causes Muscle Cramps

The mechanism actually points the opposite direction. Creatine super-hydrates muscle tissue, which should reduce cramping risk, not increase it. Dr. Candow specifically notes that in hot, humid conditions, creatine may be one of your best allies for cramp prevention rather than a cause of it.

The Dosing Question Almost Everyone Gets Wrong

This is where the interview gets genuinely useful, because Dr. Candow lays out a tiered dosing framework that most creatine marketing never explains.

The effective dose is not one-size-fits-all. It depends entirely on which tissue you're targeting and how metabolically stressed that tissue currently is:

• General skeletal muscle: 3 to 5 grams daily is sufficient to fully saturate muscle stores within about 30 days.
• Muscle in adults over 50: 5 to 7 grams daily, because age-related decline in muscle creatine content may require a higher intake to achieve the same saturation.
• Bone health: 8 to 12 grams daily, and critically, only effective when combined with resistance training. There is no standalone bone benefit from creatine without the mechanical loading of weight-bearing exercise.
• A healthy, unstressed brain: Essentially zero additional creatine needed. The brain synthesizes its own creatine endogenously and the blood-brain barrier doesn't easily let supplemental creatine through under normal conditions.
• An acutely stressed brain: 20 to 30 grams, in a single dose. This is the number that surprises most people, and it's the direct answer to why "5g won't reach your brain" — the brain dose for stress conditions is four to six times higher than the standard muscle dose.

This single distinction — muscle dose versus brain dose — is probably the most important takeaway from the entire interview. If you're taking 5 grams and wondering why you don't feel sharper during a sleep-deprived week, the answer is simple: 5 grams was never going to get there. For more on how absorption and dosing interact, see our breakdown of creatine monohydrate versus other forms and why monohydrate remains the gold standard regardless of dose.

What Creatine Does to a Stressed Brain

Dr. Candow's framing is precise: "A healthy brain likely doesn't need any creatine. But what if you're stressed?" Sleep deprivation, night shift work, and exam cramming all turn a healthy brain into a metabolically stressed one — and that's where creatine becomes useful.

The clearest evidence for this comes from a 2024 study published in Nature's Scientific Reports by researchers at Forschungszentrum Jülich in Germany. Researchers gave participants a single high dose of creatine monohydrate (0.35 grams per kilogram of body weight — roughly 20 to 30 grams for most adults) and then kept them awake for 21 hours straight while running cognitive tests. Compared to placebo, the creatine group showed meaningfully better performance on logical and numerical reasoning tasks, faster language processing speed, and improved sustained attention on psychomotor vigilance testing. Brain scans confirmed creatine was rapidly increasing phosphocreatine and ATP levels in the brain during the sleep-deprived state — direct physiological evidence, not just subjective reporting.

Dr. Candow's summary of how this feels in practice: the effect shows up in challenging cognitive tasks the next day rather than as an immediate, noticeable buzz. This isn't a stimulant effect. It's a metabolic buffer that shows up exactly when your brain is under genuine load. We've covered the broader mechanism in our guide to creatine and brain health for adults over 40, and if poor sleep is a recurring issue for you rather than an occasional all-nighter, our guide on resetting your circadian rhythm tackles the root cause directly.

The Depression Research: A Genuinely Surprising Finding

One of the more striking claims in the interview concerns clinical depression, and it holds up under scrutiny. A randomized, double-blind, placebo-controlled trial published in the American Journal of Psychiatry in 2012 examined 52 women with major depressive disorder, all taking the SSRI antidepressant escitalopram. Half received an additional 5 grams of creatine daily; half received a placebo alongside their medication.

The results: by week two, the creatine group was already showing greater symptom improvement than the placebo group. By the end of the eight-week trial, the remission rate was twice as high in the creatine group — 52 percent compared to 26 percent on the antidepressant alone. The researchers, led by Dr. Perry Renshaw at the University of Utah, hypothesize that creatine's role in cellular energy production may help restore brain bioenergetics that are disrupted in depression, allowing the antidepressant itself to work faster and more completely.

This is a single proof-of-concept study, and Dr. Candow is careful to flag it as an area of ongoing research rather than settled science. But a doubled remission rate from adding 5 grams of an inexpensive, well-tolerated supplement to existing treatment is the kind of finding that warrants serious follow-up — and follow-up trials are in fact underway.

Alzheimer's and Neurodegeneration: Early but Promising

Dr. Candow also references early-stage research into Alzheimer's disease, where an eight-week trial using 20 grams of creatine daily increased brain creatine content by 11 percent, improved cognitive test scores, and increased handgrip strength — a measure that is itself a known predictor of survival in dementia patients. He's careful to note these were single-arm, open-label studies without a placebo control, meaning the signal is promising but not yet definitive. Larger, properly controlled trials are needed before this becomes a clinical recommendation, but the direction of the early data is consistent with everything else in this interview: creatine's role expands dramatically once you introduce stress, aging, or disease to the equation.

Why You Lose 1% of Your Muscle Every Year After 40

Dr. Candow is unambiguous about hierarchy: weight training is the hammer, and creatine is the screwdriver. Sedentary adults lose approximately 1 percent of muscle mass annually after age 40, a process called sarcopenia, and muscle mass is one of the strongest predictors of functional independence later in life — your ability to get up from a chair, climb stairs, and avoid falls.

Creatine doesn't replace resistance training, but it meaningfully amplifies what training produces. The mechanism is straightforward: creatine phosphate is the immediate energy buffer your muscles use to regenerate ATP during high-intensity effort. Supplementation raises your phosphocreatine stores, which lets you complete more total training volume — more load, more reps, more sets — and that increased volume is what drives the adaptation. Dr. Candow notes that expected lean mass gains from creatine alone are modest, around 1.2 to 2 kilograms total, with roughly half of that being actual skeletal muscle. The more significant effect shows up in performance: strength, power output, endurance, and functional movement quality.

For a deeper look at how this plays out specifically for adults managing age-related muscle loss, see our complete guide to creatine for adults over 40.

Quality Markers: What Dr. Candow Actually Looks For

Given his 120-plus published papers and decades in the lab, Dr. Candow's advice on choosing a product is refreshingly simple. Three things matter:

1. Form: Creatine monohydrate. Every safety and efficacy study referenced in this interview — and the overwhelming majority of the research literature — is based on monohydrate specifically. It remains the most studied, most cost-effective, and most reliably effective form available.
2. Purity standard: Look for Creapure, the German manufacturing standard recognized as the gold standard for purity.
3. Third-party certification: NSF certification or equivalent third-party testing, which verifies the product is free of contaminants like lead or arsenic and actually contains what the label claims.

That last point matters more than it sounds. Independent testing referenced in the interview found that roughly 90 percent of off-the-shelf creatine products tested contained no detectable creatine at all. Label claims and actual contents are not the same thing in this industry, which is exactly why third-party verification isn't optional.

Frequently Asked Questions

Why doesn't 5 grams of creatine reach my brain?
The standard 3-5 gram dose is calibrated for muscle saturation, not brain uptake. A healthy brain produces its own creatine and the blood-brain barrier limits how much supplemental creatine gets through under normal conditions. Research shows meaningful cognitive effects under stress (sleep deprivation, intense mental demand) require single doses in the 20-30 gram range.

Is it safe to take 20 grams of creatine in one dose?
The research cited in this interview, including a 2023 analysis of over 25,000 cases, found no adverse effects even at daily doses above 10 grams sustained over years. Dr. Candow notes he has been unable to identify any population that cannot or should not take creatine, though anyone with pre-existing kidney disease should consult a physician first.

Does creatine actually help with depression?
Early evidence is promising but not conclusive. A randomized controlled trial found women augmenting an SSRI with 5 grams of daily creatine had double the remission rate of the antidepressant alone (52% vs 26%) at 8 weeks. This is a proof-of-concept finding, not an established treatment protocol, and further trials are ongoing.

How much creatine do I actually need for muscle versus brain benefits?
For general muscle health, 3-5 grams daily. For adults over 50, 5-7 grams daily. For bone health (combined with resistance training), 8-12 grams daily. For acute cognitive support under stress, 20-30 grams as a single dose.

Does creatine cause hair loss?
No credible evidence supports this. The myth originated from one small rugby study showing a DHT increase within normal range with no measured hair thinning. A more recent controlled trial found no effect on hair at standard doses.

What should I look for when buying creatine?
Creatine monohydrate specifically (not other forms), ideally Creapure-certified for purity, and third-party tested (NSF or equivalent) to confirm the product actually contains what the label claims.

Complete Your Daily Foundation

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About the Author

Kim Brissett-Lier is the founder of Elemental Edge Health. After losing 100+ lbs in his 40s and rebuilding his strength, energy, and mental clarity through targeted supplementation and consistent daily habits, Kim created Elemental Edge to help other adults 40+ experience the same transformation — without the extremes.

Source: Bartlett, S. (host). "Anti-Aging Expert: Why Everyone Is Taking Creatine For Weight Loss." The Diary of a CEO, interview with Dr. Darren Candow. Referenced studies: Gordji-Nejad et al., "Single dose creatine improves cognitive performance and induces changes in cerebral high energy phosphates during sleep deprivation," Scientific Reports 14, 4937 (2024); Lyoo et al., "A Randomized, Double-Blind Placebo-Controlled Trial of Oral Creatine Monohydrate Augmentation for Enhanced Response to a Selective Serotonin Reuptake Inhibitor in Women With Major Depressive Disorder," American Journal of Psychiatry 169(9), 937-945 (2012).