Un estudio relaciona niveles normales bajos de vitamina B12 con cambios cerebrales

Español

Un estudio de la Universidad de California en San Francisco ha relacionado niveles bajos, pero aún normales, de vitamina B12 activa con un pensamiento más lento y daños en la materia blanca en adultos mayores sanos. La investigación, publicada en Annals of Neurology en 2025, sugiere que las directrices actuales podrían pasar por alto riesgos neurológicos tempranos. Los investigadores examinaron a 231 participantes con una edad promedio de 71 años.

El estudio se centró en adultos mayores sin demencia ni deterioro cognitivo leve. Los participantes tenían un nivel sanguíneo promedio de B12 de 414.8 pmol/L, muy por encima del mínimo estadounidense de 148 pmol/L. Aquellos con niveles más bajos de B12 activa mostraron una velocidad de procesamiento más lenta y respuestas visuales retrasadas tras realizar ajustes por edad, sexo, educación y riesgos cardiovasculares.

Artículos relacionados

Realistic illustration of a fatigued young adult overlaid with brain MRI and blood cell visuals highlighting altered ATP energy patterns linked to depression.
Imagen generada por IA

Study links major depression in young adults to altered cellular energy patterns in brain and blood

Reportado por IA Imagen generada por IA Verificado por hechos

Researchers studying young adults with major depressive disorder have reported an unusual energy “signature” in both the brain and immune blood cells: higher ATP-related measures at rest, paired with a reduced ability to increase energy production when demand rises. The findings, published in Translational Psychiatry, may help explain common symptoms such as fatigue and low motivation, though the work is early and based on a small sample.

Higher midlife vitamin D levels linked to lower brain tau protein

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.

Study links brain blood flow changes to Alzheimer's risk

Reportado por IA

New research from the University of Southern California suggests that subtle declines in brain blood flow and oxygen delivery may be early indicators of Alzheimer's disease. The study, published in Alzheimer's and Dementia, used noninvasive scans to connect vascular health with amyloid plaques and hippocampal shrinkage. These findings highlight the role of brain circulation in the disease process beyond traditional markers like amyloid and tau.

Salud

Stroke prompts rejuvenation-like changes in undamaged brain areas

Salud

Regular egg eating linked to lower Alzheimer’s risk

Salud

Lonely older adults have weaker memory but similar decline rates

Blood test forecasts Alzheimer's symptoms years ahead

Scientists at Washington University School of Medicine in St. Louis have developed a blood test that estimates when Alzheimer's symptoms may begin, using levels of the protein p-tau217. The model predicts onset within about three to four years, potentially aiding clinical trials and early interventions. This advance relies on data from 603 older adults in ongoing studies.

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

Reportado por IA Verificado por hechos

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.

21 de mayo de 2026 17:55

Women’s verbal memory may delay alzheimer’s diagnosis by years

20 de mayo de 2026 20:53

Study finds alzheimer's risk factors hit women harder

24 de abril de 2026 18:54

Personalized treatment plans improve early dementia symptoms

15 de abril de 2026 04:46

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

19 de marzo de 2026 08:40

Higher meat intake slows Alzheimer's decline for APOE4 carriers, Karolinska study shows

Este sitio web utiliza cookies

Utilizamos cookies para análisis con el fin de mejorar nuestro sitio. Lee nuestra política de privacidad para más información.
Rechazar