Your body constantly loses water throughout the day so in order to prevent dehydration, it is important to drink an adequate amount of water a day. It is recommended that you drink approx 2 litres or half a gallon a day. Many health gurus believe that you should sip on water all the time throughout the day, even when you are not thirsty! Many people claim that your energy levels and brain function will begin to suffer if you do not stay hydrated. Our top tips are to drink herbal teas throughout the day too – green tea and mint is our absolute favourite!