Been unwell for days...

and today is too much caffeine.

Caffeine make people jittering and anxious...

but

There's a correlation between having a daily cup of coffee and reduce risk of heart diseases and blah blah...

What's the real reason?

Cause the "antioxidant" property of coffee ?

or cause people who are high on caffeine tend to bounce more on their feet therefore lead more active lifestyle and get more cardio workout?