well....there is....this other day...i didnt take tea....and i started feeling a light headache at the mid of the day..........and it was'nt gone till i made myself a mug of tea.....and no matter what...i dont get headaches......(unless i use my head)...see....its something you get depended onn.....it becomes your need....and i guess we all are better off things which make us miserable without em.......
water