The 40% Stat

The lifestyle factors that shape brain health

That number comes from a landmark Lancet Commission report, and it's more empowering than scary. Everyday choices. How you move, how you sleep, what you learn, and who you connect with all add up to real protection for your brain over time.

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The 40% figure accounts for fourteen modifiable risk factors, from hearing loss and hypertension to social isolation and air pollution. No single habit is a silver bullet, but stacking several healthy behaviors creates compounding benefits. Think of it like a retirement fund for your brain: small, regular deposits pay off enormously down the road.

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40% Preventable

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Livingston, G., Huntley, J., Liu, K. Y., Costafreda, S. G., Selbæk, G., Alladi, S., Ames, D., Banerjee, S., Burns, A., Brayne, C., Fox, N. C., Ferri, C. P., Gitlin, L. N., Howard, R., Kales, H. C., Kivimäki, M., Larson, E. B., Nakasujja, N., Rockwood, K., Samus, Q., Shirai, K., Singh-Manoux, A., Schneider, L. S., Walsh, S., Yao, Y., Sommerlad, A., & Mukadam, N. (2024). Dementia prevention, intervention, and care: 2024 report of the Lancet standing Commission. The Lancet, 404(10452), 572–628.