Part of longevity terminology is healthspan vs. lifespan. Lifespan is how long it takes you to die. Healthspan is how long it takes you to become effectively di

Part of longevity terminology is healthspan vs. lifespan. Lifespan is how long it takes you to die. Healthspan is how long it takes you to become effectively disabled. For example your lifespan might be 80, but if you had severe Alzheimer’s since you were 65 you were dependent on many people to live still. One major goal of longevity is to extend healthspan towards the lifespan, so that your final years are quick and merciful instead of slowly wasting for a decade or more. That experience, I’m sure we all know, is painful for everyone involved.