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dementia

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·October 7, 2025·6 min read

Calcium Supplements Do Not Raise Dementia Risk

A long-term study of more than 1,400 older women found no evidence that calcium supplements increase dementia risk, easing previous concerns about their safety. Conducted over 14.5 years, the research compared women taking calcium monotherapy to those given a placebo and found no difference in cognitive outcomes.

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·October 6, 2025·6 min read

Brain’s Shape Could Reveal the Earliest Signs of Alzheimer’s

A groundbreaking study reveals that aging alters not just the size but the shape of the human brain, reshaping regions in ways linked to memory and reasoning decline. Researchers found that as people age, the lower and front areas of the brain expand outward, while the upper and back regions compress inward.

Featured Neurology Neuroscience

·October 6, 2025·4 min read

CBD Calms the Inflamed Alzheimer’s Brain

A new study reveals that cannabidiol (CBD) can significantly reduce neuroinflammation associated with Alzheimer’s disease. In experiments using an Alzheimer’s mouse model, researchers found that inhaled CBD lowered the activity of key genes driving inflammation and decreased harmful proinflammatory molecules in the brain.

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Featured Neurology Neuroscience

·October 6, 2025·6 min read

Head Injuries in Adults Linked to Dementia

A large-scale Canadian study has found that older adults who sustain traumatic brain injuries (TBI) face a significantly higher risk of developing dementia, needing home care, or being admitted to long-term care. Researchers found that TBIs, most commonly caused by falls, increase dementia risk by up to 69% in the first five years following injury.

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Featured Neurology Neuroscience

·September 27, 2025·6 min read

Sleep Disorders Predict Parkinson’s or Dementia Years Ahead

Two landmark international studies show that brain biomarkers can predict whether people with REM sleep behaviour disorder (iRBD) will develop Parkinson’s disease or dementia with Lewy bodies (DLB). MRI scans revealed that reduced glymphatic system function signals higher risk for Parkinson’s, while increased free water in the basal nucleus of Meynert predicts progression to DLB.

Featured Genetics Neurology Neuroscience

·September 25, 2025·4 min read

Infant Brain Gene Regulator May Predispose Adults to Dementia

A new study reveals that the brain’s vulnerability to disorders like multiple sclerosis and dementia may begin in early life. Researchers identified a developmental “switch” in astrocytes, the brain’s support cells, governed by the NR3C1 gene.

Featured Neurology Neuroscience

·September 20, 2025·5 min read

Dementia Prevention Must Begin in Childhood, Not Just Midlife

A large international study shows that the accumulation of social hardships across life—known as the social exposome—has lasting effects on the brain. Adverse exposures, including low education, food insecurity, and limited healthcare, were linked to cognitive decline, mental health issues, and altered brain structure and function.

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Featured Neurology Neuroscience

·September 7, 2025·6 min read

Artificial Sweeteners Tied to Faster Cognitive Decline

A large study of nearly 13,000 adults found that consuming high levels of certain artificial sweeteners is linked to faster declines in memory and thinking over eight years. The effect was particularly strong in people with diabetes and those under 60. Some sweeteners, like aspartame and saccharin, were strongly associated with decline, while tagatose was not.

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Featured Neurology Neuroscience

·August 26, 2025·3 min read

Elderly Positivity Bias May Signal Early Cognitive Decline

New research suggests that the tendency of older adults to misinterpret neutral or negative emotions as positive may be a warning sign of cognitive decline. In a study of 665 participants, positivity bias was associated with poorer cognitive performance but not with emotional decline such as depression.

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Featured Neurology Neuroscience

·August 25, 2025·6 min read

Having a Purpose in Life Linked to Lower Dementia Risk

A new study of over 13,000 adults found that having a strong sense of purpose in life is linked to a reduced risk of dementia. Those with higher purpose were 28% less likely to develop cognitive impairment, even when accounting for genetic risk and other factors.

This shows an older woman and a cat. A brain is in the background.

Featured Neurology Neuroscience

·August 12, 2025·5 min read

Feline Dementia Mirrors Human Alzheimer’s

A new study shows that cats with dementia exhibit brain changes strikingly similar to those seen in Alzheimer’s disease, including the toxic build-up of amyloid-beta in synapses. These changes disrupt connections between brain cells and contribute to memory and thinking decline.

This shows an older woman looking through a photo album with her caregiver.

Featured Neurology Neuroscience

·July 30, 2025·5 min read

Dementia Often Goes Undiagnosed for Over 3 Years

A global analysis has revealed that people with dementia wait an average of 3.5 years after symptom onset before receiving a diagnosis. The delay is even longer—about 4.1 years—for early-onset dementia, with younger patients and those with frontotemporal dementia facing the greatest lags.