http://www.telegraph.co.uk/health-fitness/body/surprising-health-benefits-caffeine/
TL/DR Version:
1. It might make you smarter
2. It could reduce your risk of Parkinson's
3. It's fuel for your workout
4. It could lower your risk of diabetes
5. It makes you more logical and speeds up your reaction time
6. It goes great with ibuprofen
7. It will save your hair
8. It could lower your risk of mouth and throat cancer