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Creatine Supplement Guide: Separating Facts From Myths

31 May 20257 min read By Dushyanta Dushyanta

Creatine is the most studied supplement in sports nutrition. Hundreds of peer-reviewed trials, four decades of safety data, and a 2017 International Society of Sports Nutrition position stand (Kreider et al.) concluded it is “one of the most effective ergogenic aids available” for strength, power, lean mass and recovery. Despite that, the kidney rumour, the dehydration rumour, the steroid rumour, and the loading-phase rumour keep coming back. None of them hold up against the data.

This guide separates what the evidence supports from what the gym folklore says, and tells you exactly how to use creatine if you decide to take it.

3 to 5 g
Daily dose. No loading required.
5 to 10%
Strength gain on top of training
2 to 4 wk
Time to muscle saturation at 3 to 5 g
~1 g
Daily creatine your body makes naturally

Source: Kreider RB et al. ISSN position stand. J Int Soc Sports Nutr. 2017 (PMID 28615996).

How creatine works inside the muscle

Your muscles store creatine as creatine phosphate. During short, intense efforts (a heavy set of squats, a sprint, a jump, the final reps of a hard set), the phosphate group is donated to ADP to rapidly regenerate ATP, the immediate energy currency of the cell. The reaction is faster than glucose metabolism and faster than fat oxidation, which is why creatine matters for power outputs lasting under about 10 seconds and for repeated efforts with short rests.

When you supplement creatine, you raise the muscle's stored creatine phosphate by roughly 20 to 30 percent above baseline. More stored creatine means more rounds of rapid ATP regeneration before fatigue forces you to stop. The result, on average, is one or two extra reps per heavy set, slightly more weight on the bar across a training block, and faster recovery between sets.

Across 4 to 12 weeks of consistent use combined with resistance training, the per-set gain compounds into measurable strength and lean mass increases. Trained adults typically add 5 to 10 percent more strength than equivalent training without creatine.

What the research actually shows

  • Strength. The 2003 meta-analysis by Rawson and Volek pooled 22 studies and found a 8 percent advantage in maximal strength vs placebo. Repeated meta-analyses since have confirmed similar magnitude.
  • Lean mass. Higher training volume plus intracellular water and downstream protein-synthesis effects produce a small lean mass advantage over time, typically 1 to 2 kg more than training alone across 12 weeks.
  • Older adults. Chilibeck and colleagues (Open Access J Sports Med 2017) showed creatine plus resistance training preserves and rebuilds muscle and bone in adults aged 50+. The combination outperforms training alone in this age group.
  • Brain. Avgerinos and colleagues' 2018 meta-analysis (Exp Gerontol) reported small but consistent improvements in short-term memory and reasoning, particularly under sleep deprivation, mental fatigue, or vegetarian baseline.
  • Vegetarians. Baseline muscle creatine stores are lower in adults who do not eat meat or fish. Supplementation closes the gap, and several trials show larger relative gains in this group.
  • Recovery from injury. Limited trial evidence suggests creatine reduces strength loss during limb immobilisation and accelerates muscle recovery afterward.

Five myths the data has already settled

Myth 1
Creatine damages the kidneys
False in healthy adults. Long-term studies up to 5 years show no kidney harm. The myth stems from a rise in serum creatinine, a breakdown product of creatine that doctors use to estimate kidney function. The rise is expected on creatine and does not indicate damage. People with known kidney disease should still discuss with a GP.
Myth 2
It causes dehydration and cramps
False. Creatine pulls water into the muscle cell, which slightly raises hydration status. Controlled studies in athletes show no increase in dehydration, cramping, or heat illness. The myth survives because creatine sometimes increases body weight slightly (intracellular water gain), which gets misread as a fluid problem.
Myth 3
You need a loading phase
Not required. Loading (around 20 g/day for 5 to 7 days) reaches muscle saturation faster. 3 to 5 g/day reaches the same plateau in 2 to 4 weeks. Both work. Skipping the loading phase avoids the digestive upset some adults experience on high single doses.
Myth 4
It is a steroid
False. Creatine is a naturally occurring amino-acid derivative present in red meat and fish. Your body synthesises about 1 g per day in the liver and kidneys. It carries no hormonal action and is not banned by any sport governing body (UK Anti-Doping, WADA, IOC).
Myth 5
Newer forms (HCL, ethyl ester, buffered) are better
No head-to-head trial has shown an advantage over creatine monohydrate. Monohydrate has the most safety and efficacy data and is the cheapest. The marketing on newer forms is stronger than the evidence behind them.

How to take it

3 to 5 g of creatine monohydrate, every day, including rest days and weekends. Timing is flexible; the goal is to keep the muscle store full, not to time a peak around training. Many adults prefer to take it alongside a meal or a protein shake because that habit is already in place.

Mix it with water or any drink. Creatine monohydrate dissolves slowly and the residue at the bottom of the glass is normal; drink it anyway. Slightly warm water helps dissolution.

Choose a brand with third-party verification. The big three are Informed Sport, NSF Certified for Sport, and USP Verified. These confirm what is on the label is what is in the tub and that the product is free of contaminants and banned substances. UK trusted brands include Optimum Nutrition, MyProtein, Bulk, and Nutrabay; pick the cheapest third-party-verified option.

Who benefits most

Adults doing resistance training
The largest evidence base. 5 to 10 percent strength gain over 4 to 12 weeks of consistent use.
Vegetarians and vegans
Lower baseline muscle creatine. Larger relative gains than meat-eaters.
Older adults
Slows the muscle loss that drives falls and frailty after 60. Combine with two strength sessions a week.
Sleep-deprived adults
Small but consistent cognitive benefit under fatigue. New parents and shift workers benefit most.

Frequently asked questions

Will creatine make me gain weight?
A small intracellular water gain of 0.5 to 1.5 kg appears within the first two to four weeks. This is muscle water, not fat. Body fat percentage usually drops because lean mass rises faster than total weight. If you compete in a weight-category sport, factor this in around weigh-ins.
Do I need to cycle off creatine?
No. There is no evidence that long-term continuous use causes problems in healthy adults. Cycling off only resets the muscle stores back to baseline, which removes the benefit. Take it daily for as long as the training benefit matters.
Will it cause hair loss?
A single 2009 South African rugby study showed an increase in DHT levels with high-dose loading. No subsequent trial has replicated this and no trial has shown an increase in hair loss with creatine use. Current evidence does not support the concern.
Is creatine safe for teenagers?
The ISSN 2017 position stand concluded creatine is safe for adolescents engaged in supervised resistance training. UK practice usually waits until 16+ and requires parental involvement and qualified coaching. Younger athletes should rely on food first.
Should women take creatine?
Yes. The strength and bone-protective effects are similar between sexes. Women, particularly post-menopausal women, see strong benefits when creatine is paired with resistance training. The intracellular water gain is smaller in absolute terms than in men.

Bottom line

3 to 5 g of creatine monohydrate daily, every day, with a third-party-verified brand. No loading required. Expect a 5 to 10 percent strength gain over the first three months and a small lean mass advantage over the year. The most evidence-based, cheapest, and safest supplement on the market.

Work with DT Fitness London

For a personalised plan covering training, nutrition, and supplements, book a consultation at www.dushyantatomar.com.

Dushyanta Tomar, MSc Applied Sports and Exercise Physiology, CIMSPA Accredited Personal Trainer.

Sources

  1. Kreider RB, Kalman DS, Antonio J, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr. 2017, vol 14, page 18. PMID 28615996. pubmed.ncbi.nlm.nih.gov/28615996
  2. Avgerinos KI, Spyrou N, Bougioukas KI, Kapogiannis D. Effects of creatine supplementation on cognitive function of healthy individuals: a systematic review of randomized controlled trials. Exp Gerontol. 2018, vol 108, pages 166 to 173.
  3. Chilibeck PD, Kaviani M, Candow DG, Zello GA. Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: a meta-analysis. Open Access J Sports Med. 2017, vol 8, pages 213 to 226.
  4. Rawson ES, Volek JS. Effects of creatine supplementation and resistance training on muscle strength and weightlifting performance. J Strength Cond Res. 2003, vol 17, issue 4, pages 822 to 831.
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