Coffee; 4 ways it can affect you and how much is ok?

A question I am often asked and one that is still subject to confusion due to the conflicting advice we are bombarded with is ‘Should I drink coffee?’. The ‘coffee experience’ has become a part of modern life and culture and indeed an enjoyment whether gathering with friends or when you’re at a point in the day when you’re in need of a boost. But is it really doing you good or worse, could it be causing you harm?