Good advice for the average person is to be guided by thirst – drink when you’re thirsty and avoid drinking if you’re not. There is no scientific evidence for the recommendation to drink 2 litres per day.
While extra fluids in hot weather and when exercising are a good idea, too much fluid can be harmful and can lead to ‘water intoxication’.
Plain tap water is the preferred drink and is much cheaper and more environmentally friendly than bottled water.
Sports drinks are only needed if exercising vigorously for 90 minutes or more. Sugary soft drinks, fruit drinks, fruit juices, cordials and alcoholic drinks should be kept to a minimum.
Please note this information was correct at time of publication.
For up to date information, speak to your doctor.