Lancet Commission updates: 45% of dementia cases potentially preventable; new risk factors LDL and vision loss; new study shows 13-year delay from midlife management

The Lancet Commission's 2026 update confirms 45% of dementia cases could be prevented or delayed by addressing 14 modifiable risk factors, including newly added LDL cholesterol and vision loss. A new study adds concrete evidence: managing midlife diabetes, smoking, and hypertension can delay dementia by 13 years, with racial disparities (16 vs 19.6 years). This reinforces hope and actionable prevention strategies for seniors and caregivers. New studies also show daily music listening linked to 39% lower risk.