Healthspan is how long you live free from serious illness, while lifespan is...
https://deansbestchat.hexaforgey.com/posts/what-is-marc-kielburger-known-for-and-why-is-he-in-longevity-news
Healthspan is how long you live free from serious illness, while lifespan is total years lived. Globally, there's a 9.6-year gap between these two, and in the US, it’s even wider at 12.4 years