The reason that i am still awake until now. It is nearly 5am yet i am not sleepy. Just read this article in the web...and had 3 cups of green tea yesterday!!!..now i know!

Green Tea Side Effects Alert #1:
When you have too much caffeine.

Tea contains about half the amount of caffeine found in coffee, so moderate consumption of green tea is unlikely to cause problems for the majority of people.

If you are sensitive to caffeine, here are the symptoms to watch out for:

• restlessness
• irritability
• sleeping problems
• tremor
• heart palpitations
• loss of appetite
• upset stomach
• nausea
  
• frequent urination
• skin rash