Drugs and bad habits can be a real problem for one's health - I saw it with my own eyes how one of my friends nearly was lost because of the drug habit. That's still a common problem, I think, but thankfully there are rehabs: https://addictionresource.com/drug-rehab/locator/

Taking care of our health sounds like a very obvious and even trivial truth. We tend to forget about the most important things in our daily life. Very often we ignore all things which don't have any deadlines and focus our attention on something looking more urgent. But almost all things without proper deadlines are the most important and health is just one of them. So let's keep it in mind