u/DrowsyDuck_

How do all these articles know that doing [x thing] decreases/increases rate of [y thing] for health related things

I see those weird articles where they say that doing this increases lifespan etc etc
How do they know that?
What are they measuring to know that?
How do they know that it increases by [x] years and all?

reddit.com
u/DrowsyDuck_ — 4 days ago