Scientists have concluded that 3 cups of coffee a day can extend your life.
Here: http://www.torontosun.com/2017/07/11/3-cups-of-coffee-a-day-can-help-extend-your-life-study
However, they point out that how you prepare it can affect results. If you use French Press or slow drip, you can die of boredom. Instant coffee can kill you instantly.
Finally, freeze dried coffee will put you in a cryogenic stasis until you wake up 1,000 years later and find out that coffee killed the entire human race off.
Enjoy!