Jul 13, 2026Sleep

Sleep Apnea, Insomnia, and Dementia Risk: What We Know

Do insomnia and sleep apnea raise dementia risk? A 2025 meta-analysis links both to later cognitive decline, but treatment has not proved dementia prevention.

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Jul 12, 2026Neurodegeneration

Fitness and Alzheimer’s Risk: What the Evidence Shows

Can better cardiorespiratory fitness slow Alzheimer's-related decline? Cohort data link fitness to memory and biomarkers, but trials cannot prove cause.

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Jul 10, 2026Aging Biomarkers

Blood Biomarkers May Improve Cognitive-Decline Trial Enrollment

GFAP, NfL, p-tau, and amyloid blood tests may help enroll higher-risk cognitive-decline trial participants, but they cannot yet predict your future.

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Jun 18, 2026Cognitive Aging

Gait Speed and Dementia Risk: An Early-Warning Signal

Can gait speed flag dementia risk early? Evidence on walking, balance, chair stands, brain changes, and why exercise has not proved prevention in older adults.

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Apr 6, 2026Physical Activity

When Does Exercise Matter Most for Dementia Risk?

Framingham data link physical activity in midlife and later life to lower dementia risk. What the finding means—and what it cannot prove.

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Mar 29, 2026Mental Health

tDCS for Alzheimer’s: Does a Lower Dose Work Better?

A 2025 meta-analysis links lower tDCS current density with cognitive gains in Alzheimer's and MCI—but healthy-brain enhancement remains unproven.

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Mar 25, 2026Physical Activity

Does Sitting Harm Brain Health Even If You Exercise?

Older adults who sit more often score worse on memory and executive function. Here's what brain-volume, activity, and wearable research can and cannot show.

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Mar 25, 2026Nutrition

Polyphenols and Memory: Why Anthocyanins Stand Out

Can blueberry anthocyanins support memory after 50? Meta-analyses find small, uneven effects—and cocoa supplements have failed key trials.

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Mar 25, 2026Hormone Therapy

Menopausal Hormone Therapy and Dementia: What Changes Risk

Does menopausal hormone therapy raise dementia risk? Evidence points to timing, estrogen versus combination therapy, duration, route, and uncertainty.

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Mar 25, 2026Sleep

Sleep Disruption, Tau, and Alzheimer’s Risk: What We Know

Poor sleep tracks with tau and Alzheimer's biomarkers, and a randomized trial found sleep lowers CSF tau. But prevention claims remain unproven.

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Mar 24, 2026Sleep

Can Midlife Sleep Therapy Improve Cognition? What We Know

Can CBT-I or mindfulness in midlife improve sleep and cognition? Review six trials, the apnea caveat, and the unproven dementia-prevention claim.

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Mar 24, 2026Nutrition

Fish, Fish Oil, and Dementia Risk: Why the Evidence Splits

Fish intake is linked to lower dementia risk, but fish-oil trials keep coming up empty. What omega-3 evidence means for brain health.

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