Foundational Health Series
Creatine Is Not What You Think
It’s a health intervention
Read on kevferrell.com
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Reboot - Health & Longevity
Supplement Spotlight: Creatine
If you’re not taking creatine, you might want to consider it. It sits at the top of my list of essential supplements.
Creatine is one of the most extensively studied and broadly beneficial supplements available today.
For decades, it has been associated primarily with strength and athletic performance. That reputation is well earned. What is becoming increasingly clear, however, is that its benefits extend well beyond the gym — into cognitive performance, metabolic health and healthy aging.
Few supplements offer this breadth of impact.
Although creatine has been available since the 1980s, it was misunderstood for years. It was often grouped with performance-enhancing drugs and occasionally labeled as dangerous or harmful to the kidneys.
The scientific literature does not support those concerns.
Creatine monohydrate is among the most researched supplements in existence, with decades of data supporting both its safety and effectiveness across a wide range of populations.
I take it daily and recommend it broadly.
My 71-year-old mother takes it.
My teenage son takes it.
That should give you a sense of where it sits in my own hierarchy of foundational tools.
Why This Matters
Every meaningful aspect of health — strength, cognition, recovery, resilience — depends on energy availability at the cellular level.
As we age, energy production becomes less efficient. Muscle mass declines. Cognitive performance can soften. Recovery slows.
These changes are not random.
They are downstream of biology.
Creatine supports one of the body’s primary energy-buffering systems.
This is not merely about optimization.
It's about protection.
What Is Creatine?
Creatine is a naturally occurring compound critical to storing and releasing cellular energy.
It can be obtained through diet and supplementation, and it is also synthesized in the liver from the amino acids arginine, glycine, and methionine.
More than 90% of the body’s creatine is stored in skeletal muscle. The remainder is distributed in the brain and other organs.
Its primary role is to support the regeneration of adenosine triphosphate (ATP), the body’s immediate energy currency.
During periods of high energy demand — lifting weights, sprinting, repeated intervals or intense cognitive effort — ATP is depleted rapidly. Phosphocreatine acts as an energy buffer, helping regenerate ATP and allowing cells to sustain output.
Because energy availability underpins nearly every physiological process, the implications extend far beyond performance.
Dietary Sources (and Why They’re Not Enough)
Creatine is found naturally in:
Average intake from diet is roughly 1–2 grams per day.
Most research demonstrating performance, cognitive and aging benefits uses supplemental doses of at least 3–5 grams per day. In certain research contexts, higher intakes have been explored.
Achieving those levels consistently through food would require consuming very large amounts of animal protein daily, which is impractical for most people.
Individuals following vegetarian or largely plant-based diets typically have lower baseline muscle creatine stores and often experience more pronounced benefits from supplementation.
Supplementation ensures adequate saturation.
Evidence-Based Benefits
The research base supporting creatine is extensive and continues to grow.
1. Physical Performance
Creatine is widely considered the most effective ergogenic supplement available for high-intensity exercise.
Research consistently shows that creatine:
- Increases strength and power
- Enhances training volume
- Improves lean mass gains
- Promotes muscle recovery
Its effects in this domain are robust and well established.
2. Age-Related Muscle Loss (Sarcopenia)
With aging, muscle mass, bone density and strength decline.
Research demonstrates that creatine supplementation combined with resistance training can slow the age-related decline better than resistance training alone.
Preserving muscle is not simply aesthetic. It is central to metabolic health, mobility and longevity.
3. Cognitive Function and Mental Performance
The brain is one of the most metabolically demanding tissues in the body.
Creatine supports the brain’s natural energy production by helping maintain ATP availability.
Creatine supplementation has been shown to:
- Improve working memory
- Increase processing speed
- Reduce mental fatigue
- Improve cognitive performance
These effects appear particularly relevant during periods of high cognitive demand, aging, or reduced sleep.
In practice, I notice improved mental sharpness when taking higher doses, especially on days when sleep has been less than ideal. While anecdotal, this effect is consistently reported by many individuals and aligns with emerging research on brain energy metabolism.
For the professional, mental fatigue is the equivalent of muscle failure. Creatine acts as a 'backup battery' for high-stakes cognition.
4. Sleep and Recovery
Creatine does not replace sleep.
However, some research suggests it may help preserve cognitive performance during sleep restriction and may improve perceived recovery without altering sleep architecture itself.
For those navigating demanding schedules or heavy training loads, this may provide meaningful support.
5. Neuroprotection and Brain Aging
Emerging research suggests creatine may support:
- Mitochondrial efficiency
- Reduced oxidative stress
- Cellular resilience
Creatine has been explored in neurological conditions such as Parkinson’s and Huntington’s disease. Large-scale Alzheimer’s trials are still developing, the biological rationale is compelling: improving cellular energy buffering may support neuronal health under metabolic stress.
Many longevity-focused physicians consider creatine a low-risk intervention with potential upside for brain aging.
6. Depression and Mood
Impairments in brain energy metabolism have been implicated in depressive disorders.
Compounds that enhance cellular energy storage and utilization, including creatine, are being investigated as adjunctive therapies.
Some clinical trials suggest creatine may augment antidepressant treatment and cognitive behavioural therapy in reducing depressive symptoms. This area remains under active investigation but is mechanistically plausible.
7. Metabolic Regulation
Creatine combined with exercise may:
- Improve glycemic control
- Support insulin sensitivity
- Influence lipid metabolism
Because skeletal muscle plays a central role in glucose disposal, preserving and enhancing muscle function has meaningful metabolic implications.
8. Cardiovascular and Vascular Health
Creatine may influence vascular health through antioxidant activity, nitric oxide pathways and support of endothelial function.
While this area requires further study, mechanistic pathways are promising.
Form
The overwhelming majority of research supports creatine monohydrate.
Despite marketing of alternative forms (HCl, buffered, liquid) no consistent evidence demonstrates superiority over monohydrate.
It remains the gold standard: stable, effective, and extensively studied.
Dosage
3-5 grams per day is sufficient for general muscle saturation.
A loading phase (20 grams per day for 5–7 days) can accelerate saturation but is not required.
5-10 grams per day is often suggested by experts as being more optimal for cognitive benefits.
Up to 20 grams per day may be required for the full neuroprotective benefits, though definitive long-term dosing standards for these goals are still evolving.
Some may experience gastrointestinal discomfort at higher doses, but this often resolves with regular use. Starting with divided doses can prevent these issues.
A general bodyweight-based guideline often referenced is approximately:
0.06–0.07 grams per pound of bodyweight
For example, ~10 grams daily for a 150 lb individual.
How I take it
I aim for 20 grams per day, typically in one dose, most often in a post-workout protein smoothie. Occasionally I split the dose.
I consistently notice improvements in strength output, recovery and mental clarity, particularly during periods of higher cognitive load or sleep restriction.
Anecdotal, yes.
But directionally aligned with the underlying physiology.
Timing
Timing is not critical.
Consistency matters more than whether it is taken pre- or post-workout.
Taking creatine with meals may slightly improve uptake due to insulin response, but the practical impact is modest.
If using it to support cognitive performance during sleep restriction, morning intake may be beneficial.
Safety Profile
Creatine is one of the most well-studied supplements available.
Hundreds of studies have shown that creatine monohydrate supplementation is effective and does not produce adverse health risks in healthy individuals.
Research consistently shows:
- No evidence of kidney damage in healthy populations
- No evidence of liver toxicity
- No increased risk of cramping or dehydration
- Safety in long-term use
The kidney concern largely stems from confusion with creatinine— a blood marker used to assess renal function. Creatine supplementation may slightly elevate your serum creatinine levels on a blood test. This is often a false flag for kidney issues. It’s simply the byproduct of the creatine metabolism in the body. Inform your doctor you are taking creatine before your next labs.
As with any supplement, individuals with severe kidney disease should consult a physician before use.
For healthy individuals, the safety data is strong.
Creatine Myths (Sidebar)
It causes kidney damage”
There is no evidence supporting this in healthy individuals. Multiple long-term trials show normal kidney function markers.
“It causes hair loss”
Some studies have observed increases in DHT levels, a hormone that can contribute to male pattern baldness, but there is no direct evidence demonstrating that creatine causes hair loss. This recent study that looked at the issue specifically provides strong evidence against this claim.
“It causes bloating”
Creatine increases intracellular water within muscle cells, not subcutaneous bloating. This cellular hydration contributes to performance benefits.
“It causes dehydration or cramps”
Research does not support increased cramping or dehydration risk. Some data suggest improved hydration status.
Source Matters
Quality and purity matter.
Using third-party tested products reduces contamination risk and ensures label accuracy — both important considerations in the supplement industry.
Many people have asked me which brand I use. I use Momentous because it is NSF Certified for Sport and independently tested for purity. If you are interested, I’ve arranged this discount code that will add additional savings at checkout.
Final Word
Creatine is not a niche performance supplement.
It is a foundational tool that supports strength, muscle preservation, cognitive resilience, and metabolic health.
Extensively studied.
Strong safety profile.
Broadly applicable.
It remains one of the most practical and evidence-backed additions to a longevity-focused protocol.
Protecting your energy systems now is far easier than attempting to rebuild them later.
One Action
Conduct a 30-day Bioenergetic Trial
If you are not currently supplementing with creatine, begin with 3–5 grams of creatine monohydrate daily for the next 30 days. Observe strength, recovery and mental clarity.
Inspiration
“Take care of your body. It’s the only place you have to live.”
— Jim Rohn
Reader's Corner
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Until next week,
Kevin
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