What the research found

Researchers studied 51 perimenopausal women (average age 46) over six weeks. Half completed twice-weekly resistance training with creatine supplementation; half received placebo with training; a smaller group did no training. Brain activity was measured using a sensor tracking oxygenated blood flow to the prefrontal cortex during cognitive tests.

The training itself produced the clearest result: women who lifted showed faster reaction times on the Stroop test, a standard measure of focus and impulse control. The creatine group showed a distinct pattern during mental tasks—they mobilized more oxygen-rich blood to the prefrontal cortex compared to placebo. Additionally, women taking creatine reported more stable sleep patterns (measured nightly on wearables) and fewer days experiencing temperature sensitivity, a common perimenopausal symptom.

However, creatine did not improve actual cognitive test scores beyond the effect of training alone. The supplement altered how the brain worked under cognitive load and affected sleep quality and symptom burden, but did not sharpen thinking independent of the training stimulus.

Why it matters for you

If you're tracking biomarkers during perimenopause, this research connects three outcomes you likely monitor: cognitive function, sleep quality, and symptomatic relief. The data suggests resistance training is the dominant intervention—a non-pharmacological tool that produced measurable improvements in reaction time and mental processing speed in a population often told cognitive decline is inevitable.

For those supplementing with creatine, this study offers specificity. A standard dose (around 5 grams daily) appears well-tolerated and may stabilize sleep architecture and reduce vasomotor symptoms without requiring a loading phase. If you're tracking HRV, sleep architecture on a wearable, or subjective measures like hot flash frequency, creatine may be worth monitoring as an adjunct to training—not as a replacement for it.

The practical takeaway for MyKine users: the training protocol (twice weekly, heavy) drove the cognitive gains. Creatine supported that foundation by optimizing brain fuel delivery under stress and improving sleep consistency, two factors that themselves influence cognitive performance and recovery.

Caveats

• Small, early-stage study: 51 women over six weeks; authors describe this as exploratory, not definitive
• No improvement on cognitive scores: Creatine changed brain physiology but did not outperform placebo on actual thinking measures
• Single measurement tool: Brain oxygenation via forehead sensor is a proxy for cognitive function, not direct evidence of improved cognition
• Conflict of interest: One senior author advises creatine companies; the source author produces a creatine product
• Perimenopause-specific: Findings may not generalize to other populations or life stages