Creatine

Creatine - The most studied supplement

Definition

Creatine is a natural compound produced by the human body (liver, kidneys, pancreas) from 3 amino acids: arginine, glycine and methionine. It is stored at 95% in skeletal muscle as phosphocreatine.

It is by far the most studied sports supplement in the world, with over 1000 published scientific studies. Its efficacy and safety are proven beyond any reasonable doubt.

💡 Creatine is not a doping product. It is a molecule naturally present in red meat and fish, and produced by your own body every day.

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How does creatine work?

To understand its effect, you need to understand how your body produces energy during intense effort.

The ATP-PC system

During an explosive effort (squat, sprint, deadlift), your muscles use ATP (adenosine triphosphate) as fuel. But your ATP stores are limited: they are depleted in 2-3 seconds.

Phosphocreatine is then used to rapidly regenerate ATP, extending the duration of intense effort by a few extra seconds.

By supplementing with creatine, you increase phosphocreatine stores in your muscles, which allows you to:

• Lift heavier
• Do more reps at maximum intensity
• Recover faster between explosive sets

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Scientifically proven benefits

Benefit	Evidence level	Average effect
Strength increase	★★★★★	+5-15%
Muscle mass gain	★★★★★	+1-2 kg over 4-12 weeks
Explosive performance	★★★★★	Significantly improved
Recovery between sets	★★★★	Improved
Cognition and memory	★★★	Emerging benefits
Brain health (aging)	★★★	Promising leads

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Which creatine to choose?

The market is flooded with different forms: creatine HCL, ethyl ester, kre-alkalyn, micronized creatine... Marketing is intense.

The scientific truth: creatine monohydrate is the only one to use.

• ✅ Most studied form (90% of studies use monohydrate)
• ✅ The cheapest (3-5x less expensive than other forms)
• ✅ Maximum proven effectiveness
• ❌ Other forms cost more without any extra demonstrated benefit

⚠️ Look for the "Creapure®" label on the packaging: it's the German seal guaranteeing the purity and quality of the creatine monohydrate.

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Dosage and timing

Standard method (recommended)

Take 3 to 5 g per day, every day, at any time. Muscle saturation happens in 3-4 weeks.

Loading phase (optional)

If you want to saturate faster: 20 g/day for 5-7 days, split into 4 doses. Then a maintenance dose of 3-5 g.

The upside: you feel the effects within 1 week instead of 4. The downside: possible digestive issues at first.

When to take creatine?

Scientific verdict: timing barely matters. Daily consistency is what truly counts. A few nuances:

• Slight preference for post-workout intake with a meal
• With carbs: better absorption (insulin helps transport)
• On rest days: take it anyway, whenever you want

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Side effects and myths

Creatine is the victim of many myths. Let's clear them up.

Myths to bury

• ❌ "Creatine damages the kidneys": no study on healthy subjects has shown this. Over 30 years of hindsight.
• ❌ "You need to cycle it": false, you can take it year-round without breaks.
• ❌ "It bloats you up like doping": the initial weight gain (1-2 kg) is intramuscular water retention, not fat.
• ❌ "Women shouldn't take it": studies show the same benefits in women.

Real (minor) side effects

• ⚠️ Water retention: +1-2 kg in the first weeks (intramuscular, normal)
• ⚠️ Digestive issues: rare, mostly during loading or if taken without water

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Who is creatine useful for?

Profile	Recommendation
Strength training practitioner	✅ Highly recommended
Explosive sports (sprint, team sports)	✅ Recommended
Pure endurance sports (marathon)	⚠️ Limited benefit
Vegetarians / Vegans	✅ Very useful (no dietary intake from meat)
Older adults (sarcopenia)	✅ Recommended
Students / cognitive work	✅ Interesting cognitive benefits

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Key takeaways

Creatine monohydrate is the best value-for-money in sports nutrition. Safe, cheap, effective, backed by decades of research. If you train and you hesitate between several supplements, always start with this one. 3-5 g per day, for life, and you'll have made the most rational supplementation choice possible.