Creatine

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. This coupling enables direct energy transfer between the mitochondrial interior and the rest of the cell, optimising ATP production efficiency. Creatine therefore does more than buffer available energy. It also improves the efficiency with which mitochondria produce it.

Key Benefits

• Strong

  Creatine increases physical performance in successive bursts of short-term, high-intensity exercise. This effect is confirmed by numerous controlled trials and recognised by European health authorities (effect obtained with 3 g per day).

• Strong

  A meta-analysis of six randomised trials shows a significant improvement in working memory and reasoning speed. The effect is more pronounced in older adults, during mental fatigue or sleep deprivation.

• Strong

  In adults over 50 engaged in resistance training, adding creatine produces significantly greater gains in lean mass compared to exercise alone, according to a meta-analysis published in Medicine & Science in Sports & Exercise.

• Strong

  In the same population, creatine combined with exercise improves functional strength to a greater extent than exercise alone. This benefit is directly linked to the quality of muscular work enabled by increased phosphocreatine reserves.

• Moderate

  Vegetarians and vegans, whose creatine reserves are naturally lower due to the absence of dietary intake, show the most marked cognitive gains after supplementation.

• Moderate

  A 12-month trial in postmenopausal women showed that creatine combined with resistance training preserves functional strength and bone quality markers at the femoral neck, compared to exercise alone.

• Emerging

  Mitochondrial creatine kinase optimises the coupling between ATP production and its transfer to the cytoplasm. Converging data suggest a supportive role in mitochondrial metabolism, an active research area in the field of aging.

Dosage & Forms

Among available forms (monohydrate, ethyl ester, hydrochloride, kre-alkalyn, nitrate, pyruvate), creatine monohydrate is the only one whose efficacy is confirmed by over three decades of research. The official position of the International Society of Sports Nutrition (ISSN) is unambiguous: no alternative form has demonstrated superiority in head-to-head trials.

Creatine ethyl ester partially degrades into creatinine before reaching muscle. Kre-alkalyn has shown no advantage over monohydrate in controlled trials. Monohydrate achieves approximately 99% bioavailability when consumed with a meal containing carbohydrates and protein.

Singular uses micronised monohydrate (200 mesh). Micronisation reduces particle size, improving dispersibility and dissolution speed. The documented optimal dosage is 3 to 5 g per day, with no loading phase. This approach saturates phosphocreatine reserves within 3 to 4 weeks. Cycling (alternating periods with and without supplementation) is not supported by any scientific data. Daily consistency is the only determining variable.

In the Singular Formula

Safety & Precautions

Creatine monohydrate benefits from an exceptional safety track record. Over 500 clinical trials, including some spanning up to 5 years of continuous supplementation, have reported no adverse effects on renal, hepatic or cardiovascular function in healthy individuals.

The nephrotoxicity myth stems from a confusion between creatine and creatinine. Supplementation raises serum creatinine (a natural creatine degradation product), which may skew the interpretation of standard kidney blood tests. It is advisable to inform your healthcare professional about creatine intake before a serum creatinine test.

The initial weight gain of 0.5 to 1.5 kg during the first weeks corresponds to intracellular hydration (creatine draws water into the muscle cell). This phenomenon is physiological and does not constitute an adverse effect.

Creatine is not recommended for individuals with pre-existing kidney conditions. Pregnant or breastfeeding women, as well as children, should consult a healthcare professional before supplementation, due to the lack of specific data in these populations. No clinically significant drug interactions are documented at recommended doses.

Scientific Studies

Frequently Asked Questions