Everyone knows that we need to keep well hydrated and that drinking plenty of water is good for us – the major question is how much is good for us and can you drink too much? There have been many studies into how much water people should drink every day and most studies agree that we need approximately 8 glasses of water a day – but how do you define ‘a glass’? Another survey suggested that we need 2.5 litres of water a day. This should mean that you avoid drinking too much or too little, drinking the right amount of water will mean that your body is able to function properly, alongside a healthy diet and lifestyle. Water helps the brain function, gets rid of waste in your body, keeps your skin clear and improves concentration.