Better brain function, healthier bones, improved blood sugar control and even greater heat tolerance -experts reveal the lesser-known benefits of one of the world’s most researched supplements
PICS: Getty Images
Mention creatine to most gym-goers and the conversation often goes in one direction: bigger lifts, fuller muscles and faster recovery between sets.
Maybe a little cognitive boost, too. As one of the world’s most-researched supplements, creatine’s reputation is well earned, but it also means an entire second body of research on the staple gets overlooked.
Scientists working outside sports nutrition, in fields like psychiatry, endocrinology and sleep science for example, have been testing creatine’s effects on the brain, bones and metabolism.
What they’ve found suggests the supplement sitting in your kitchen cupboard is doing rather more than helping you grind out one extra rep. Here’s how.
It helps your brain function on no sleep
Sleep deprivation starves brain cells of the same rapid-fuel system creatine tops up in muscle, which is why researchers at Forschungszentrum Jülich tested it as a countermeasure.
In a trial published in Scientific Reports, a single high dose of creatine given to sleep-deprived adults produced measurable improvements in brain energy metabolism and cognitive performance within three hours, peaking at four, but lasting up to nine.
Processing speed and short-term memory saw the biggest gains and, while it won’t replace a proper night’s rest, for anyone facing a long shift, a day of meetings or a long-haul flight, the effect is a useful buffer against mental fog.
It may take the edge off low mood
Creatine’s role in brain energy metabolism has pushed researchers to test it as an add-on treatment for depression, largely because a struggling brain burns through its energy reserves faster than a healthy one.
A systematic review and meta-analysis in the British Journal of Nutrition, pooling eleven trials and over a thousand participants, found creatine supplementation produced a small but statistically significant reduction in depressive symptoms.
The authors were careful to flag the evidence as low quality and the effect as modest, well short of clinical significance on its own. It’s not a substitute for treatment, but it adds weight to the idea that creatine’s reach extends well past the weights room.
It helps regulate blood sugar
Creatine influences how muscle cells shuttle glucose out of the bloodstream, which has made it a subject of interest for researchers working across metabolic health.
Take randomised, placebo-controlled trial in type 2 diabetics, for example, which combined creatine with a structured exercise programme and found it significantly improved glycaemic control compared with exercise alone, with the benefit linked to greater recruitment of GLUT-4, the transporter protein responsible for pulling glucose into muscle cells.
The effect wasn’t down to extra insulin production, but to muscle becoming more efficient at using the glucose already available.
It strengthens bone, not just muscle
Bone remodels constantly, and the process is more energy-hungry than most people assume, which is where creatine’s core function comes back into play.
A 12-month randomised trial combining creatine with resistance training in older adults found it preserved bone density at the femoral neck, the hip site most vulnerable to fracture, and increased a bone geometry measure linked to structural bending strength.
A larger two-year follow-up found no change in overall bone mineral density but confirmed the improvements in bone geometry and walking speed held up. For anyone lifting into their forties and beyond, that’s a meaningful bonus most people never hear about.
It doesn’t dehydrate you, and might help you handle heat
Despite the rumours that creatine causes cramping and dehydration, a systematic review and meta-analysis of ten controlled trials examining creatine’s effects on hydration and thermoregulation found no negative impact on core temperature, sweat rate or heart rate, even in hot conditions.
If anything, the extra intracellular water creatine draws into muscle appeared to help maintain plasma volume during exercise. For anyone training outdoors through summer or worried about the old cramping myth, the research quickly debunks outdated gym folklore.
