Most people think of creatine as a gym supplement. Something bodybuilders take to squeeze out a few extra reps. That reputation isn't wrong — but it's deeply incomplete.
Creatine is fundamentally an energy buffer. It stores and delivers energy to tissues with high, fluctuating demand. Your muscles are one of those tissues. Your brain is another. And so are your bones.
What creatine actually does
To understand why creatine matters beyond the gym, you need to understand phosphocreatine. Your cells use ATP for energy. When ATP gets used, it loses a phosphate group and becomes ADP. Phosphocreatine donates its phosphate to rapidly regenerate ATP — faster than any other energy pathway in your body.
This matters most in tissues that experience sudden, intense energy demands. A muscle fiber contracting explosively. A neuron firing during complex problem-solving. An osteoblast building new bone matrix. These are all moments where the speed of energy delivery determines performance.
Dr. Darren Candow, one of the leading creatine researchers in the world, describes it as a "spatial and temporal energy buffer." It's not just about having more energy — it's about having energy exactly where and when your cells need it most.
Creatine and the brain
Your brain represents about 2% of your body weight but uses roughly 20% of your daily energy. It has one of the highest metabolic rates of any organ. And here's the challenge: the brain actively resists taking up creatine from the bloodstream.
The blood-brain barrier limits creatine transport, which means brain creatine levels change slowly with supplementation. But the research shows that over time, consistent daily supplementation does increase brain creatine stores — and this has meaningful consequences during metabolic stress.
Sleep deprivation
When you're sleep-deprived, your brain's energy metabolism is compromised. Studies show that creatine supplementation attenuates cognitive decline during sleep deprivation. Working memory, reaction time, and executive function all hold up better when brain creatine stores are elevated. If you've ever had a bad night's sleep before an important day, this finding matters.
Concussion and traumatic brain injury
After a concussion, the brain enters an energy crisis. Cellular energy demand spikes while energy production capacity drops. Supplemental creatine may help maintain cellular bioenergetics during this critical window.
Researcher Sergej Ostojic has published work suggesting creatine supplementation may also support recovery in Long COVID patients experiencing cognitive symptoms — a condition that shares some metabolic features with traumatic brain injury.
Depression and mood
Emerging research suggests creatine may have antidepressant properties, potentially through its effects on brain energy metabolism. The evidence is still early, but the biological rationale is sound: depression involves measurable changes in brain bioenergetics, and creatine directly supports the energy systems affected.
"Creatine isn't just a muscle supplement. It's an energy buffer for every demanding tissue in your body — and your brain may be the tissue that benefits most during stress."
— Dr. Darren Candow, University of Regina
Creatine and bone health
This is the research most people haven't heard about. Dr. Candow has conducted long-term trials combining high-dose creatine with resistance training in postmenopausal women — a population at significant risk for osteoporosis and fracture.
The findings: creatine plus resistance training preserved bone geometry better than resistance training alone. The doses used in these bone studies were higher than typical muscle doses — around 8-11 grams per day. But the combination of creatine's energy-buffering effects in osteoblasts (bone-building cells) and the mechanical loading from resistance training produced meaningful structural benefits.
This has significant implications for aging adults. Bone loss accelerates after age 50, and fractures are among the leading causes of disability and mortality in older populations. A safe, affordable supplement that supports bone preservation alongside exercise is genuinely valuable.
The dosing question
Roger Harris's landmark 1992 study established the foundational dosing principles that still hold today. His research showed that muscle creatine stores increase with supplementation and plateau at a saturation point.
Here's what the current evidence supports:
- Muscle performance: 3-5g per day of creatine monohydrate
- Brain support (long-term): 4-5g per day, taken consistently — brain uptake is slow, so daily consistency matters more than dose timing
- Bone preservation: 8-11g per day in combination with resistance training (as used in Dr. Candow's trials)
Creatine monohydrate remains the most studied and most effective form. Other forms (creatine HCL, buffered creatine, creatine ethyl ester) have not demonstrated superiority in head-to-head research. Don't pay extra for fancy formulations.
Safety and misconceptions
Creatine has been studied in over 500 peer-reviewed papers. It has one of the best safety profiles of any supplement on the market. The common concerns don't hold up under scrutiny:
- Kidney damage: No evidence of kidney harm in healthy individuals at recommended doses. This myth stems from the fact that creatine increases creatinine (a kidney marker), but the elevation is a harmless artifact of supplementation, not a sign of kidney stress
- Fat gain: Creatine does not increase fat mass. Initial weight gain is from water retention in muscle cells — a sign the supplement is working
- Dehydration: Studies show creatine does not increase risk of dehydration or cramping, even in athletes exercising in heat
Who benefits most
Older adults stand to gain the most from creatine supplementation. Age-related decline in muscle mass (sarcopenia), bone density, and cognitive function are all areas where creatine has demonstrated meaningful support.
Vegans and vegetarians also see larger benefits because they consume less dietary creatine from meat. Their baseline stores tend to be lower, so supplementation produces a bigger relative increase.
Creatine in the Coastline system
The Coastline Morning Blend includes creatine monohydrate at a clinical dose. Not a token amount for label decoration — a meaningful dose informed by the research. Combined with the other evidence-led ingredients in the Morning Blend, it supports the energy, cognitive, and structural foundations that matter most as you age.
See the clinical dose in every scoop
Frequently asked questions
Do I need a loading phase for creatine?
No. A loading phase (20g/day for 5-7 days) reaches muscle saturation faster, but daily doses of 3-5g will reach the same saturation point within about 3-4 weeks. Loading can cause digestive discomfort in some people, so the steady approach is preferred for long-term use.
Can women take creatine?
Absolutely. Much of Dr. Candow's bone research was conducted specifically in postmenopausal women. Creatine is equally effective and equally safe for women. The outdated perception that creatine is "for men" or will cause bulk is not supported by the evidence.
When should I take creatine?
Timing doesn't matter much. What matters is daily consistency. Taking creatine at the same time each day — with a meal, in a morning blend, or post-workout — helps build the habit that ensures your stores stay saturated. For brain benefits especially, the long-term consistency is what counts.
Written by the Coastline science team. This article draws on research from Dr. Darren Candow (University of Regina), Roger Harris's 1992 dosing study, and Sergej Ostojic's work on creatine and brain health, as discussed on Reason & Wellbeing.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
