I am on my sabatical now which I started to recover from burnout working in early stage startup. I stopped drinking coffee. I have drunk 4 to 8 coffees daily at work. It helped me to survive the day but I did not enjoy the taste. It was like eating pills. Also it did not help with sleep at night and rest during the day. I have not drink coffee or green tea for 4 months and now I have started again because I crave for coffee taste but I drink way less (3-4 coffees a week). Good think is that I enjoy it again, it helps me concentrate and also it does not interfere with my rest and sleep. The same applies to alcohol even in small amounts. It helps you to cope with overwork but it drains you in long term.
edit: So it is not only about health but also about satisfaction and well being.
When I see my interns drinking Red Bull for work: I get it that you have extremely high career objectives, but maybe you’re stressing about them more than working on them.
Worst case, you can work 8hrs during the day and study 3hrs in the evening with or without Red Bull: in both cases you’ll end up burnt out, you can just force it for a few months more with drugs.
edit: So it is not only about health but also about satisfaction and well being.