Mix water with grapefruit! It tastes great, will delight you with its refreshing effect and will dramatically speed up your metabolism.
Half a grapefruit squeezed in a little warm water and a sprig of rosemary, does wonders for your line.
Drink immediately, there is no need to wait.
This combination will surely speed up the metabolism, but it has much more pleasant taste of water with lemon, which is used for weight loss.