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7 min read

Ice Baths vs Saunas: Which Wins for Longevity?

Your social media feed is probably full of ice bath warriors and sauna evangelists, each claiming their method is the ultimate longevity hack. Wim Hof disciples swear by cold exposure, while Finnish sauna enthusiasts point to decades of research on heat therapy. So which extreme actually delivers better results for healthy aging? The answer might surprise you.

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5 min read

NMN vs NAD+: The Science Behind the Hype

Let's get straight to the point about NMN and NAD+ supplements – what they actually do, why your body can't absorb NAD+ directly, and how to choose the right longevity supplement for your needs.

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6 min read

PQQ vs CoQ10: The Mitochondrial Power Duo

You've probably heard of CoQ10 – it's been the darling of the supplement world for decades. But there's a newcomer that's got longevity researchers excited: PQQ. While most people debate which one is "better," the real question is why you'd choose between them when they work together like a perfectly orchestrated team.

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Creatine: The Most Studied Supplement & 6 Myths Debunked
3 min read

Creatine: The Most Studied Supplement & 6 Myths Debunked

Creatine monohydrate is the most researched supplement in the world—with over 1,000 peer-reviewed studies spanning decades. The evidence is overwhelming: it's safe, effective, and beneficial for far more than building muscle.

Yet myths persist. Let's set the record straight with what the science actually says.

What Is Creatine?

Creatine is a naturally occurring compound made from three amino acids. Your body produces about 1g daily, and you get more from meat and fish.

How it works: Creatine increases your muscles' phosphocreatine stores, which rapidly regenerates ATP, your cells' energy currency. This means more readily available energy for muscles, brain cells, and every cell in your body.

What the Research Shows: Key Benefits

1,000+ studies demonstrate that creatine:

  • Increases muscle strength and mass by 5-15% on average
  • Preserves muscle during aging (critical after age 40 when you lose 3-8% muscle mass per decade)
  • Improves cognitive function including memory, processing speed, and mental clarity
  • Supports cellular energy for daily activities, not just the gym
  • Protects muscle during calorie restriction (important for fat loss)

Who benefits: Athletes, older adults, women in perimenopause/menopause, vegetarians/vegans, anyone wanting brain and muscle support.

The 6 Myths About Creatine (Debunked by Science)

Myth 1: "Creatine Damages Your Kidneys"

The Truth: Zero evidence in healthy individuals.

Hundreds of studies, including long-term trials (5+ years), show creatine is completely safe for healthy kidneys. Creatine slightly increases creatinine (a waste product in kidney tests), but this is normal and doesn't indicate damage.

If you have pre-existing kidney disease, consult your doctor. For healthy people: totally safe.


Myth 2: "Creatine Causes Bloating"

The Truth: Creatine pulls water INTO muscle cells (intracellular), not under your skin (bloat).

You might gain 1-2 pounds as muscles store more water, but this is hydration inside muscle tissue—making muscles fuller and more functional. It's NOT subcutaneous bloating.

Verdict: Muscle hydration (good), not bloating (bad).


Myth 3: "You Need to Cycle Creatine"

The Truth: No scientific reason to cycle on and off.

Your body doesn't develop tolerance. Long-term continuous use (years) is safe and effective. Cycling was suggested decades ago with zero evidence—it just means losing benefits until you restart.

Verdict: Continuous daily use is recommended.


Myth 4: "Creatine Is Only for Bodybuilders"

The Truth: Everyone benefits—especially women, older adults, and vegetarians.

Women see equal benefits for muscle preservation and brain health. Adults over 40 need it for muscle loss prevention. Vegetarians/vegans often see MORE benefits since they get zero dietary creatine from food.

Verdict: Creatine is for everyone, not just gym bros.


Myth 5: "You Must Load with 20g/Day"

The Truth: Loading is optional—it just saturates muscles faster.

Loading protocol (20g/day for 5-7 days) achieves full saturation in one week. Standard protocol (5g/day from the start) achieves the same result in 3-4 weeks. No difference long-term.

Verdict: Loading is optional. Consistent 5g/day works fine.


Myth 6: "Creatine Causes Hair Loss"

The Truth: One flawed 2009 study suggested this. Hundreds of other studies show no connection.

That single study in rugby players had major design flaws and hasn't been replicated. Millions of people take creatine long-term without hair loss.

Verdict: No credible evidence linking creatine to hair loss.


How to Take Creatine (Based on 1,000+ Studies)

Type: Creatine monohydrate (most studied and effective form)

Dosage: 3-5g daily (5g is the research-backed dose)

Timing: Doesn't matter—creatine works through muscle saturation, so consistency beats timing

Loading: Optional (speeds results but not necessary)

Hydration: Drink plenty of water

How long: Continuous daily use is safe and effective

Who Should Take Creatine?

✅ Ideal for:

  • Adults over 40 (muscle preservation, brain health)
  • Women in perimenopause/menopause
  • Vegetarians and vegans (no dietary creatine)
  • Anyone doing resistance training
  • People wanting cognitive support

⚠️ Consult your doctor if:

  • You have kidney disease
  • You're pregnant/breastfeeding

The Bottom Line

Creatine is the most studied supplement in the world for good reason: it works, it's safe, and benefits extend far beyond the gym.

The science is clear:

  • ✅ Safe for healthy kidneys (hundreds of studies confirm)
  • ✅ Doesn't cause bloating (hydrates muscles)
  • ✅ No need to cycle (continuous use is safe)
  • ✅ Benefits everyone (not just bodybuilders)
  • ✅ Supports muscle, brain, and cellular energy

If you want one supplement backed by overwhelming evidence, creatine monohydrate is it.

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Angus Macintosh

About the author

Angus Macintosh

Co-Founder | Operations & Product Development

Angus Macintosh is Co-Founder of Keeper, where he leads operations, product development and much of the research behind Keeper’s formulations. His interests span longevity science, supplementation and health optimisation, with a particular focus on understanding the evidence behind emerging ingredients and how they can be used in practical, everyday routines.

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