Does caffeine really kicks?
 In past when I tried to do my assignment in home, it’s impossible because of my roommates. When I tried at library, I cannot have drinks So, I had no option left other than going to star bucks. Things are changed now and I have quiet environment at home. Sadly, I cannot concentrate at all. I spend lot of money in their coffee. I want to stop drinking coffee.  I want to stop but seem like impossible. So my question is does caffeine really help to study of its only me who thinks so? Any thoughts????