I'm not saying it's all your fault, but maybe you should have turned your sister on to crystal meth? All the energy minus the sugar and teeth.

right there with your sister, but I have that knowing disregard. I simply don't care enough

Yes. It's definitely the energy drinks and not an experimental medication that is 100% safe and effective.

If sister is an adult, no one but herself is responsible for her actions or the consequences. While you obviously care for your sister, you cannot live her life for her. Even if you try your best to get her to do the right things, she’s ultimately going to do what she chooses and bear the consequences of that… It’s like with adult children - You are very limited in what you can do to get them to make the right choices. And if you push too hard, often the person will chose to do something different just to show they are their own person… Your concern does you credit, but ultimately it’s up to sister to find the motivation to change her habits, not you.

F your sisters life. But she is an adult and can make her own choices. You can guide and give advice, you cannot force your views and thoughts on her. Even if it is an early grave. If your way would work, then we wouldn't have millions of families having the same struggle, some people are content to live their one life how ever they like be it energy drinks, caffeine, alcohol, gym, drugs, travelling. All are right and wrong in someone's eyes, yet freewill is personal guide, and sometimes what we think is best for our loved one, in their eyes can feel like you're forcing them to conform to your views. Respect people boundaries and choices, voice your concern but do not put them down.

I’m surprised my coworker hasn’t had a heart attack for the same reason