Studie kopplar vitamin C-nivåer till hjärnans struktur hos äldre

1 juli 2026

Rapporterad av AI

Forskare i Japan har identifierat ett samband mellan högre blodvärden av vitamin C och större volym av grå substans samt starkare konnektivitet i ett centralt hjärnnätverk hos vuxna över 64 år.

Den observationsbaserade studien undersökte MRT-bilder och plasmaprover från 2 044 deltagare. Lägre vitamin C-koncentrationer korrelerade med minskad grå substans och svagare kopplingar i hjärnans default-nätverk efter justeringar för ålder, utbildning och fysisk aktivitet.

Forskningen, som leddes av Haruka Nagaya vid Hirosaki University, publicerades den 10 juni 2026 i PLOS ONE. Den bygger vidare på tidigare evidens som kopplar intag av vitamin C via kosten till kognitiva resultat, men kan inte fastställa något orsakssamband.

Tomohiro Shintaku påpekade att resultaten ger upphov till hypotesen att en kost rik på vitamin C skulle kunna stödja hjärnans hälsa och dämpa åldersrelaterad kognitiv försämring. Forskarlaget efterlyste ytterligare studier som följer nivåer över tid i olika populationer.

Stöd till studien erhölls från KAGOME CO., LTD. samt genom anslag från Japan Agency for Medical Research and Development.

Relaterade artiklar

Split-scene illustration of UCSF mouse study: older mouse struggles in maze with poor hippocampal neural links due to FTL1; treated mouse excels with enhanced connections.

UCSF study links iron-associated protein FTL1 to age-related memory decline in mice

5 april 2026 Rapporterad av AI Bild genererad av AI Faktagranskad

Researchers at the University of California, San Francisco report that higher levels of the iron-associated protein FTL1 in the hippocampus of older mice are tied to weaker neural connections and worse performance on cognitive tests. In the experiments, reducing FTL1 in older mice was associated with increased neuronal connectivity and improved memory performance, findings published in Nature Aging.

Study finds lower normal B12 levels tied to brain changes

A University of California San Francisco study has linked lower but still normal levels of active vitamin B12 to slower thinking and white matter damage in healthy older adults. The research, published in Annals of Neurology in 2025, suggests current guidelines may miss early neurological risks. Researchers examined 231 participants with an average age of 71.

Higher midlife vitamin D levels linked to lower brain tau protein

7 april 2026 Rapporterad av AI

A new study has found that adults with higher vitamin D levels in their 30s and 40s tend to have lower levels of tau protein in their brains about 16 years later. Tau is a key biomarker associated with dementia. The research, published this week, highlights a potential modifiable risk factor for brain health.

Health

Personalized treatment plans improve early dementia symptoms

Health

Study links nitrate sources to dementia risk

Health

Yale study finds nearly half of older adults improved with age

Study finds fish oil supplements provide no brain benefits

A two-year clinical trial has shown that high-dose omega-3 fish oil supplements do not improve memory or slow brain changes linked to Alzheimer's disease. The research involved 365 older adults at elevated risk for the condition. Results challenge widespread claims about the supplements' protective effects.

Brain protein decline linked to aging in mice study

24 maj 2026 Rapporterad av AI

A 2023 study found that falling levels of the protein Menin in the hypothalamus drive multiple signs of aging in mice. Restoring the protein or supplementing with the amino acid D-serine improved memory and other measures.

24 juni 2026 21:54

Studie kopplar vitamin C-nivåer till hjärnans struktur hos äldre

Relaterade artiklar

UCSF study links iron-associated protein FTL1 to age-related memory decline in mice

Study finds lower normal B12 levels tied to brain changes

Higher midlife vitamin D levels linked to lower brain tau protein

Personalized treatment plans improve early dementia symptoms

Study links nitrate sources to dementia risk

Yale study finds nearly half of older adults improved with age

Study finds fish oil supplements provide no brain benefits

Brain protein decline linked to aging in mice study

Study finds vitamin D deficiency persists year-round among older and minoritized ethnic adults in northern Britain

Review urges a shift from minimum to “optimal” protein and exercise guidance, author says

Review finds calcium and vitamin D supplements offer little benefit

Learning musical instrument in 70s may protect memory

Study of nearly 4,000 adults finds brain-health scores can improve into the 90s

Study links glucosamine use to faster progression from mild cognitive impairment to dementia

Study links vitamin B12 and folate to fatigue

Japanese scientists develop enhanced vitamin K for neuron regeneration

Researchers question vitamin B12 levels and cancer links

Lifelong cognitive enrichment tied to lower Alzheimer’s risk and later symptom onset, study finds

Denna webbplats använder cookies