Creatine monohydrate is one of the most studied supplements in existence. The evidence is unambiguous: it works.
Yet most lifters are confused about what it does, how to use it, and whether it's actually worth taking. This guide covers the mechanism, the evidence, the practical application, and addresses the myths.
What is Creatine Monohydrate?
Creatine is an amino acid derivative (not a steroid, not a drug) found naturally in meat and fish. Your body also produces it in the liver and kidneys.
Your muscles store creatine as phosphocreatine (creatine phosphate). This is the high-energy molecule that regenerates ATP, your cellular energy currency.
Here's the cascade:
- You contract a muscle. ATP is used, providing energy.
- Phosphocreatine immediately donates its phosphate group to rebuild ATP.
- Your muscles can function at high intensity for ~10-30 seconds (enough for 6-15 reps in the gym).
- After that window, ATP must be regenerated through oxidative metabolism (slower process).
Creatine supplementation increases muscle creatine and phosphocreatine stores. This expands the window of high-intensity work and allows better ATP regeneration during and between sets.
The Evidence: It Works
Creatine is the most researched sports supplement. Hundreds of studies document its effects across different populations.
Strength: Creatine supplementation increases strength by approximately 5-15%, depending on the person and the lift. This isn't massive, but it's meaningful.
Power output: Similar effect. Creatine helps generate force and power, which translates to heavier lifts and more reps.
Lean mass: Over 8-12 weeks of training with creatine, lifters gain roughly 1-2kg more lean mass than control groups. Part of this is water (creatine pulls water into muscle cells, increasing muscle volume and hydration). Part is actual muscle protein synthesis driven by the additional training stimulus (creatine allows harder training, which drives more growth).
Training volume: Creatine allows higher total volume over time (more reps, more weight, more sets). This accumulated volume is the mechanism behind muscle growth.
Speed of effect: Creatine takes time to accumulate. Maximum benefit appears after 3-4 weeks of consistent supplementation. This is why "loading" (high doses for 5-7 days) is sometimes suggested — to reach optimal saturation faster. But loading isn't necessary; slower accumulation works fine.
Safety: Creatine is one of the safest supplements. Decades of research show no adverse effects on kidney function (despite myths), no liver damage, no hormonal disruption. It's safe for most people, including those with family history of kidney disease (assuming current kidney function is normal).
The only potential issue: increased water retention can cause a slight increase in blood pressure in some individuals. This is reversible upon cessation.
What Creatine Doesn't Do
Doesn't directly increase testosterone: Creatine doesn't alter hormonal profiles. It works through mechanical/metabolic mechanisms, not hormonal.
Doesn't cause hair loss: This myth originated from a single 2009 study showing a correlation between creatine and increased DHT (dihydrotestosterone). The study was small and didn't establish causation. Decades of subsequent research found no link. If you're genetically predisposed to male pattern baldness, creatine won't accelerate it beyond your genetic timeline.
Doesn't work immediately: Expecting strength gains within days is unrealistic. Creatine accumulates slowly. Give it 3-4 weeks.
Doesn't require cycling: Some claim you need to cycle off creatine to "reset" your natural creatine production. This is false. Your body adapts to exogenous creatine, but there's no evidence that cycling improves long-term outcomes. Continuous supplementation is fine.
Isn't a steroid: Creatine is an amino acid derivative, not a steroid. It doesn't affect the endocrine system (beyond the water retention effect).
Dosing: How Much and How Often
Standard approach: 3-5g per day, indefinitely.
This is the most practical and evidence-backed dose. At 5g daily, you'll reach saturation in 3-4 weeks. At 3g daily, it takes 5-6 weeks. Both approaches work; the difference is speed.
Why 3-5g? This dose saturates muscle stores and maintains them without excess. Higher doses (10g+) don't provide additional benefit.
Loading protocol (optional): 20g per day (split into 4x 5g doses) for 5-7 days, then 3-5g daily maintenance.
This reaches saturation in ~5 days instead of 3-4 weeks. It's faster but less practical (requires multiple doses daily and can cause mild GI distress). Not necessary, but useful if you want immediate effect.
Timing: Doesn't matter. Creatine accumulates over time, so when you take your daily dose is irrelevant. Take it with food if you have a sensitive stomach (helps absorption).
With carbs/protein: Some research suggests creatine absorption improves with carbs and protein (insulin-mediated uptake). This is a minor benefit. Don't overthink it — just take creatine with food.
Creatine Forms: Monohydrate vs Everything Else
Creatine monohydrate: The standard. Most researched, cheapest, most effective. This is what you should buy.
Creatine HCL (hydrochloride): Marketed as "more soluble" and "more bioavailable." The evidence is weak. Slightly better solubility doesn't translate to better muscle uptake. Costs more, no clear benefit.
Creatine ethyl ester: Claimed to be more absorbable. Research doesn't support this. Costs more, doesn't work better.
Kre-Alkalyn: Buffered creatine, claimed to be more stable. The evidence is minimal. It works roughly like monohydrate at higher cost.
Creatine malate, pyruvate, citrate, etc.: Marketing variations. None outperform monohydrate in research.
Verdict: Buy creatine monohydrate. It's cheap (£5-10 for months of supply), well-researched, and effective. Everything else is marketing.
Practical Protocol
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Buy creatine monohydrate: Any brand from a reputable retailer (Myprotein, Amazon, Optimum Nutrition — all are fine).
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Take 5g daily with food: Dissolve in water or juice. Morning with breakfast is simplest.
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Be consistent: Creatine requires consistency. Missing days delays saturation and benefit.
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Continue indefinitely: No need to cycle. Take it daily as long as you're training.
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Drink enough water: Creatine increases water retention in muscles, so drink 2.5-3L daily minimum (your normal intake).
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Expect results in 3-4 weeks: You won't feel different initially. But after 3-4 weeks, you'll notice slightly easier reps, ability to add weight or reps to your lifts, and gradual lean mass increase.
Side Effects and Concerns
Mild GI upset: Taking creatine on an empty stomach can cause stomach discomfort. Solution: take it with food.
Water retention: Creatine pulls water into muscle cells. You'll gain 0.5-1kg immediately (intramuscular water, not body fat). This is fine and actually desirable (fuller muscles, better training stimulus).
Bloating: Some people report feeling bloated. Likely water retention in the subcutaneous space (under skin). Manageable by staying hydrated and adjusting dose if severe.
Increased blood pressure: Possible in some individuals, especially those with hypertension. If you have high blood pressure, monitor closely or consult your doctor before supplementing.
Kidney stress myth: Creatine doesn't damage kidneys in healthy individuals. This myth stems from creatinine (a creatine breakdown product) being used as a kidney function marker. Elevated creatinine isn't automatically bad if kidney function (GFR, BUN) is normal.
Who Should Take It
Take creatine if:
- You're training regularly (3+ times per week).
- You want to gain strength and muscle.
- You're healthy with normal kidney function.
- You want a cheap, evidence-backed supplement.
Don't take creatine if:
- You have kidney disease or severely compromised kidney function (check with your doctor).
- You're not training consistently (it won't help without stimulus).
- You're not willing to take it consistently (intermittent use doesn't work).
UK Brands and Where to Buy
- Creatine monohydrate powder — All major brands, best prices
- Creapure creatine — Pharmaceutical-grade option
- Creatine capsules — Convenient if you dislike powder
Cost perspective: A 500g tub (100 servings at 5g) costs roughly £5-10 and lasts about three months. This is the cheapest supplement per dose.
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FAQ
Does creatine make you bigger immediately? No. The initial weight gain is water (1kg), not muscle. Actual muscle gain takes 8-12 weeks of consistent training and supplementation.
Can women take creatine? Yes. Creatine works the same way in women as men. The effects are identical.
Is creatine a banned substance? No. It's legal in sports (NCAA, IOC, professional sports). You can take it anywhere.
Do I need to load? No. Loading speeds saturation but isn't necessary. 3-5g daily without loading works fine.
Does creatine work with all training styles? Yes. It helps strength, power, and endurance equally (though the mechanism differs). Any training benefits from creatine.
Will I lose gains if I stop? No. Muscle you built with creatine doesn't disappear when you stop. The supplement doesn't build muscle directly — training does. You'll lose the intramuscular water (0.5-1kg) but the muscle remains.
Bottom Line
Creatine monohydrate is one of the few supplements with robust, consistent evidence. Take 3-5g daily, expect results in 3-4 weeks, and continue indefinitely.
It's not magic — you'll gain roughly 5-15% more strength and 1-2kg more lean mass over 8-12 weeks compared to training without it. Combined with proper nutrition and sleep, this compounds into significant physique changes over a year.
Buy monohydrate, not the expensive variations. Spend £5-10 for months of supply. The money is better spent on food and training consistency anyway.
This is the one supplement worth taking. Everything else is optional.