Creatine monohydrate supports strength and repeated high-intensity exercise in men and women. Beyond muscle, the evidence is less settled: promising cognitive findings are not a guaranteed everyday benefit. 1 2 3

Beyond Muscle: Cognitive Benefits

A 2023 trial tested 5 g daily for six weeks in 123 adults. It did not establish statistically significant improvements in its primary working-memory and reasoning tests; small benefits remained possible. 2

Vegetarians did not benefit more than omnivores. Lower dietary creatine intake should not be treated as proof of lower brain creatine or a stronger cognitive response. 2

A trial published on 10 April 2026 found less deterioration on selected cognitive tasks in 29 adults during 21 hours of sleep deprivation. It used a single dose of 0.2 g/kg bodyweight. 3

That is an experimental protocol, not a daily recommendation. An overnight laboratory benefit does not establish lasting improvements, an optimal cognitive dose or a substitute for sleep. 3

For the wider food-and-lifestyle picture, see nutrition for cognitive performance.

Bone Density: Promising Ideas, Mixed Outcomes

A two-year trial randomised 237 postmenopausal women to creatine or placebo alongside resistance training and walking. Creatine did not improve bone mineral density at the hip, femoral neck or lumbar spine. 4

Some measures of bone geometry, relating to resistance to bending, were better preserved. These are not the same as denser bones or demonstrated fracture prevention. 4

The practical conclusion: do not choose creatine specifically as a bone-density treatment. For sex-specific context, see creatine for women. 4

Mitochondrial Health and Neuroprotection

The creatine-phosphocreatine system helps regenerate ATP, the energy currency used by muscle and brain cells. This provides a biological rationale for research, not proof that extra creatine improves every energy-related outcome. 5

Even trials in primary mitochondrial disorders have produced conflicting results. Energy mechanisms alone cannot establish improved mitochondrial efficiency, neuroprotection or longer life in healthy adults. 5

Dosing and Forms

For muscle-related goals, a usual approach is 3 to 5 g of creatine monohydrate daily. Loading is optional. 1

In a classic muscle-biopsy study, 3 g daily for 28 days produced a similar rise in muscle creatine to 20 g daily for six days. These were muscle-store measurements, not brain saturation. 6

For faster loading, a common protocol is 20 g daily, split into four 5 g servings, for five to seven days, then 3 to 5 g daily. 1

Choose monohydrate. Alternative forms have not established superior results; claims for HCL, buffered creatine or ethyl ester do not justify assuming better absorption or performance. 1

Safety and Practical Checks

Safety evidence is reassuring for healthy adults at studied doses, including some longer-term use. That is not a guarantee for every person or product. 1

Water retention can raise scale weight without adding fat. The amount varies, and gastrointestinal discomfort can also occur. 1 5

Creatine can raise serum creatinine and affect creatinine-based kidney estimates without necessarily indicating injury. A short trial found no corresponding deterioration in measured kidney-injury markers. 7

Tell your clinician you use creatine when discussing blood tests. Do not assume an abnormal result is harmless, and seek individual advice before starting if you have kidney disease. 7

If you take medicines or other supplements, ask your pharmacist or prescriber to check the combination. Compatibility cannot be assumed for every product. 1

If you want help deciding whether supplementation fits your training and nutrition goals, explore nutrition coaching.