Lancet Commission Says 20 Daily Habits Could Delay 45% of Dementia Cases
Updated
Updated · Quartz · Aug 21
Lancet Commission Says 20 Daily Habits Could Delay 45% of Dementia Cases
3 articles · Updated · Quartz · Aug 21
Summary
Nearly 45% of dementia cases worldwide are tied to 14 modifiable risk factors, the 2024 Lancet Commission found, framing brain health as something many people can influence through daily routines rather than genetics alone.
The 20 habits highlighted target those risks through exercise, sleep, diet, cardiovascular care, sensory treatment and mental engagement, with evidence ranging from randomized trials to long-running cohort studies.
Research cited includes a trial in which brisk walking grew older adults' hippocampus by about 2% in a year, the ACHIEVE study showing 48% slower cognitive decline in a higher-risk hearing-loss subgroup, and studies linking cataract surgery to roughly 25% to 29% lower dementia risk.
The report stresses that midlife control of blood pressure, diabetes, cholesterol, smoking, obesity and depression may matter most, while genetics such as APOE-e4 still shape individual risk.
Taken together, the findings suggest dementia prevention is cumulative: no single habit guarantees protection, but sustained changes across vascular, sensory, social and cognitive health could delay symptoms for many people.