Water balance is achieved when water intake from solid and
fluid foods and drinking water meets water losses, mainly in sweat, urine
and faeces. Seasonality, particularly in Mediterranean countries that have a
hot summer, may affect water loss and consequently water balance. Water
balance has not been estimated before on a population level and the effect
of seasonality has not been evaluated. The present study aimed to compare
water balance, intake and loss in summer and winter in a sample of the
general population in Greece.