All articles tagged with #cognitive function
A small observational study of 54 adults with MCI and sleep disturbances found that daily vitamin D intake, particularly 5,000+ IU, was associated with about a 13% higher MoCA cognitive score compared with non-supplement users, though causation cannot be established and safe dosing remains unclear; further research is needed.
A UC Davis study with 62 older adults used smartwatch prompts to rate moment-to-moment cognitive sharpness; these self-ratings tracked with brief on-device tests, suggesting real-time perceptions could help identify cognitive changes earlier and outside the clinic, though longer-term predictive value for dementia remains to be established.
In a small Emory University–led study of 54 older adults with sleep problems and mild cognitive impairment, daily vitamin D intake of 5,000 IU or more was linked to more than a 13% rise in MoCA cognitive scores versus no vitamin D, suggesting high-dose vitamin D could be a modifiable factor to support brain health during early cognitive decline; results were similar for vitamin D2 and D3, but the research is preliminary and focused on an early-risk window.
A Monash University study of more than 10,800 adults over 70 found that listening to music almost every day is associated with a 39% lower risk of developing dementia compared with those who listen less; playing an instrument or singing links to about a 35% reduction, and doing both listening and playing corresponds to roughly a 33% lower dementia risk and a 22% lower risk of cognitive impairment. Researchers say music engages multiple brain areas, supporting processing speed, language, memory, and social interaction, making it a simple, low-effort way to support brain health as people age.
A small six-month trial with 47 overweight/obese women aged 50–79 found that those who ate within an 8–9 hour daily window (and cut calories by 500) showed greater improvements in spatial planning and problem-solving than peers who ate over ~12 hours, despite similar weight loss (~15 lb). Memory tasks tended to improve as well but not significantly; no differences in reaction time or multitasking. The results suggest meal timing could offer cognitive benefits beyond weight loss, but larger studies are needed to confirm and explain the mechanisms (circadian rhythm, inflammation, metabolism).
A 2024 Nature Communications twin study found that daily prebiotic supplements (inulin or FOS) added to a protein powder improved memory test scores in people over 60, prompting the PRECODE trial at Wageningen to test three fibers—chicory inulin, resistant dextrin, and seaweed polysaccharide—over 26 weeks. Early data from 36 twin pairs show modest cognitive gains and subtle gut microbiome changes (notably more Bifidobacterium), with results expected in 2027. Researchers view these inexpensive, over-the-counter fibers as a promising, safe approach to supporting brain health during aging.
A Yale-led study of more than 11,000 Americans aged 65+ followed for up to 12 years finds that 45% show improvements in at least one domain (cognition or physical function), with those harboring more positive beliefs about aging more likely to improve; findings challenge the inevitability of decline and suggest mindset-based interventions to bolster resilience in older adults.
A large UK Biobank analysis of over 18,000 middle-aged and older adults finds that fat distribution—arm, leg, trunk, and especially visceral fat around internal organs—independently shapes brain structure, connectivity, and cognitive performance beyond BMI. Arm and trunk fat are linked to sensorimotor cortex thinning and hippocampal volume loss; leg fat affects limbic networks; visceral fat shows the strongest association with white-matter deterioration and faster brain aging as estimated by a Brain Age model. These patterns persist after adjusting for BMI, but the cross-sectional design means causality cannot be established.
Traditional 5g/day creatine remains solid for muscle performance, but emerging research is exploring higher doses (potentially up to 10g/day or more) for brain benefits, with data limited to specific conditions. Safety at higher doses appears acceptable in studies, but cognitive gains aren’t yet universal. Practical takeaway: 5g/day is fine for most; some may experiment with 10g/day (split into two doses) to potentially gain bone and brain benefits, while continuing resistance training. Evidence will sharpen in coming years.
A randomized crossover study in Somerville, MA found that using a home HEPA purifier for one month modestly improved cognitive performance—specifically mental flexibility and executive function—by about 12% in adults aged 40 and older, compared with a sham purifier, suggesting reduced particulate exposure from traffic could benefit brain health; the study notes limitations (short duration, unclear mechanism) and calls for longer research to confirm effects and explore aging-related benefits.
A cross-sectional study of 2,192 dementia-free Australian adults finds that each 10% rise in ultra-processed food (UPF) intake is tied to lower visual attention scores and higher dementia risk, independent of overall diet quality. The impact persists even among those following a healthy Mediterranean pattern, suggesting that the degree of food processing itself may drive cognitive decline via additives and processing chemicals. The study shows association, not causation, but highlights attention as a foundation for learning and a potential early dementia risk factor.
A randomized crossover study in Somerville, MA found that adults aged 40 and older who used a home HEPA air purifier for one month showed about a 12% faster performance on tests of mental flexibility and executive function versus a sham purifier, suggesting reduced particulate matter may offer modest cognitive benefits. Results are preliminary due to the small sample, age range limitations, and short duration, and the underlying mechanisms remain unclear.
A randomized crossover study of 119 people aged 30–74 in Somerville, MA found that using a real HEPA purifier for one month improved executive function/mental flexibility by about 12% in participants 40 and older compared with a sham purifier, after accounting for indoor time and stress. The small but consistent cognitive boost is similar to gains from daily exercise and highlights potential brain health benefits of reducing particulate exposure, especially for those near highways. Limitations include the short duration, modest older-subject representation, and unknown long-term effects or mechanisms; further research is planned to explore brain white matter and metabolite changes.
Outside Online weighs evidence that creatine monohydrate, widely used for muscle performance, may also support brain function under stress and fatigue by replenishing ATP, potentially helping decision-making and vigilance in extreme environments (sleep deprivation, high altitude). A 2025 review notes memory and attention gains in older adults; a 2024 study links creatine to reduced tiredness under stress; however, evidence is mixed and not all studies show cognitive benefits, especially in everyday or high-stress settings. In practical terms, 3–5 g/day is considered safe for most people (kidney disease patients should consult a doctor), though initial water retention can occur. While creatine could offer a mental edge during long expeditions or backcountry challenges, researchers emphasize that the brain-benefit remains not fully proven and more research is needed to confirm its impact in extreme conditions.
A menopause fitness expert conducted a two-week “super-dose” creatine trial (~21–24 g/day) and reported immediate cognitive benefits—improved focus, steadier energy, and better handling of travel and sleep disruption—despite no noticeable body changes in that short period. She favors creatine HCL to reduce bloating, though experts note high-dose effects are likely situational and not a general prescription. Aging may heighten the potential benefits of supplementation, but evidence is limited and individual; consult a clinician before trying large doses.