Mechanism of Action
Creatine operates through the phosphocreatine/ATP system, a rapid cellular energy regeneration mechanism. Once absorbed, it enters the cell and receives a phosphate group from the enzyme creatine kinase. It becomes phosphocreatine, a form of energy storage that can be mobilised immediately.
When energy demand is sudden (muscle contraction, intense neuronal activity, bone synthesis), phosphocreatine donates its phosphate group to regenerate ATP from ADP within milliseconds. This transfer is faster than any other energy production pathway in the body.
Creatine kinase is present in the cellular cytoplasm, but also in mitochondria, where it forms complexes with outer membrane channels. Laboratory work describes this coupling as an energy shuttle linking the mitochondrial interior to the rest of the cell. That part of the mechanism is documented in cells and animal models. In humans, direct measurement covers the muscle's phosphocreatine buffer, and that is what carries the observed effects.
Key Benefits
- Strong
Creatine increases physical performance in successive bursts of short-term, high intensity exercise. This benefit concerns adults performing high intensity exercise, and it is obtained with a daily intake of 3 g of creatine.
- Strong
Daily creatine consumption can enhance the effect of resistance training on muscle strength in adults over the age of 55. The effect is obtained with 3 g of creatine per day, in conjunction with progressive resistance training. That training is performed at least three times a week for several weeks, at an intensity of at least 65% to 75% of one repetition maximum load.
- Strong
Muscle stores genuinely rise at this dose. In 31 men followed by muscle sampling, 3 g per day raised muscle creatine by 20% over 28 days. No loading phase is needed to get there.
- Moderate
Less power lost from set to set. In 20 healthy adults aged 21, 2.3 g per day for six weeks improved fatigue resistance by 7 to 11%. The measurement covered five back-to-back sets of knee extensions, and the placebo group did not improve.
Dosage & Forms
Among available forms (monohydrate, ethyl ester, hydrochloride, kre-alkalyn, nitrate, pyruvate), creatine monohydrate is the most extensively studied and clinically effective form, and has been since the early 1990s. The official position of the International Society of Sports Nutrition (ISSN) is unambiguous: no alternative form has demonstrated superiority in head-to-head trials.
In the digestive tract, the conversion of creatine into creatinine stays minimal, whatever the transit time. Absorption into the blood approaches 100%. The molecule is unstable in aqueous solution, which is why it is sold in solid form.
Micronisation, the grinding that brings the powder down to 200 mesh, changes neither the composition nor the nutritional value of the substance: the European Commission has formally established this. Its benefit is practical, a finer powder dispersing and dissolving faster.
European conditions of use for creatine claims rest on 3 g per day. The French order of 26 September 2016 sets that same figure as the maximum per recommended daily portion. At that rate and with no loading phase, muscle creatine reaches its plateau in about four weeks. Cycling (alternating periods with and without intake) is not supported by any data. Daily consistency is the only determining variable.
In the Singular Formula
Inclusion rationale
Often filed among sports performance products, creatine is first and foremost a molecule the body makes itself. Its synthesis draws on three amino acids, including glycine, also present in the formula. It fuels the phosphocreatine/ATP system, a universal energy buffer found in muscle, brain, heart and bone. It is also the most documented bioactive in human supplementation, with over a thousand published studies. Creatine increases physical performance in successive bursts of short-term, high intensity exercise. This effect concerns adults performing high intensity exercise. In adults over the age of 55 engaged in regular resistance training, daily creatine consumption can enhance the effect of that training on muscle strength. Both effects are obtained with a daily intake of 3 g of creatine, the exact dose of the formula. At 2.3 g per day for six weeks, below that dose, healthy adults gained fatigue resistance. The measurement covered five sets of repeated high-intensity efforts, with no weight gain. Muscle biopsies set the pace: at 3 g per day, with no loading phase, total muscle creatine rises by around 20 % over twenty-eight days. The reserve builds over a month, which makes regularity the decisive variable. Dietary intake comes almost exclusively from meat and fish, while the creatine selected here is obtained by chemical synthesis, with no material of animal origin. Pooled data on kidney function show no impairment: the rise in serum creatinine, a creatine degradation product, does not reflect kidney dysfunction.
Selected form
Micronised creatine monohydrate (200 mesh). Micronisation reduces particle size to an ultrafine level, which favours dispersibility in solution and dissolution speed at the time of preparation. The monohydrate form is the most scientifically documented among all available creatine forms. Creatine is a molecule naturally synthesised by the body from arginine, glycine and methionine, stored primarily in skeletal muscle. Pure raw material. No excipient.
Formula dosage
0 to 3 g.
Dose expressed as active substance, excluding excipients and carriers of the raw material.
Synergies in the formula
Linked Biomarkers
Safety & Precautions
Creatine monohydrate benefits from an exceptional safety track record: the official position of the International Society of Sports Nutrition counts more than 1,000 studies. The largest long-term trial followed 1,741 adults in neurological care, on 10 g per day for at least five years. It found no detectable difference in adverse or serious adverse events between creatine and placebo, in any body system.
The nephrotoxicity myth rests on a confusion between creatine and creatinine. A systematic review of twenty-one studies settles it: creatine intake slightly raises blood creatinine, a natural degradation product, without impairing kidney function. It remains useful to inform your healthcare professional about creatine intake before a blood creatinine test.
Creatine is not recommended in case of a pre-existing kidney condition, in case of diabetes or use of antidiabetic medication, and during pregnancy and breastfeeding. The first two situations follow the opinion of the French food safety agency. For pregnancy and breastfeeding, European safety assessments expressly exclude these situations from their scope. No clinically significant drug interaction is documented at usual intakes.
Scientific Studies
| Authors | Year | Type | Journal | |
|---|---|---|---|---|
| Kreider RB et al. | 2017 | Review | Journal of the International Society of Sports Nutrition | View on PubMed |
International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine Official ISSN position stand, drawing on more than 1,000 studies conducted since the early 1990s. It identifies monohydrate as the most extensively studied and clinically effective form, and concludes that short- and long-term intake, up to 30 g per day for five years, is safe and well tolerated in populations ranging from infants to the elderly. | ||||
| Naeini EK et al. | 2025 | Meta-analysis | BMC Nephrology | View on PubMed |
Effect of creatine supplementation on kidney function: a systematic review and meta-analysis Systematic review of 21 studies, 12 of them pooled and covering 440 adults, with intakes of up to 20 g per day and follow-up from one week to more than twelve weeks. Blood creatinine rises slightly and transiently, with no impairment of kidney function. | ||||
| Devries MC, Phillips SM | 2014 | Meta-analysis | Medicine and Science in Sports and Exercise | View on PubMed |
Creatine supplementation during resistance training in older adults-a meta-analysis Meta-analysis of randomised placebo-controlled trials: 357 adults averaging 64 years, resistance-trained for 12.6 weeks on average. Adding creatine increased fat-free mass, chest-press and leg-press strength, and the 30-second chair stand, compared with training alone. The authors flag the limited number of available trials, and a later two-year study in 237 postmenopausal women, at a higher dose, found no strength gain. | ||||
| NET-PD Investigators, Kieburtz K et al. | 2015 | Randomised Controlled Trial | JAMA | View on PubMed |
Effect of creatine monohydrate on clinical progression in patients with Parkinson disease: a randomized clinical trial Double-blind randomised placebo-controlled trial in 1,741 adults in neurological care, on 10 g of creatine per day for at least five years. The trial was stopped for futility on its primary clinical outcome, with no detectable difference in adverse or serious adverse events between creatine and placebo, in any body system. | ||||
| Rawson ES et al. | 2011 | Randomised Controlled Trial | Nutrition | View on PubMed |
Low-dose creatine supplementation enhances fatigue resistance in the absence of weight gain Double-blind randomised placebo-controlled trial in 20 healthy adults aged 21, at 0.03 g per kilo per day, about 2.3 g, for six weeks. Fatigue resistance improved by 7 to 11% across sets 2 to 5 of knee extensions, with no improvement in the placebo group and no change in body mass. One caveat: the sample is 20, and the abstract reports comparisons with baseline values, without a group by time interaction test. | ||||
| Hultman E et al. | 1996 | Clinical Trial | Journal of Applied Physiology | View on PubMed |
Muscle creatine loading in men Muscle loading study in 31 men, with creatine measured directly in muscle. Twenty grams per day for six days raised total muscle creatine by about 20%, and 3 g per day reached the same rise over 28 days. Once intake stopped, the concentration returned to its baseline level within 30 days. | ||||