Our water requirement

Every day, a healthy adult loses 2 to 2.5 liters of water through the kidneys, intestines, skin and lungs. It is essential to replace that water in the same period, carrying portable water such as Selters mineral water is a great way to fulfil our water need. We take in around a litre of water every day with our food. This means that, depending on how old we are, we have to drink at least the remaining 1–1.5 liters every day. In fact, nutritionists recommend 1.5–2 liters under normal conditions, in order to prevent a fluid deficit.

In hot weather, or if performing strenuous physical exercise or sweating heavily, we need to drink three liters or more every day to protect ourselves from dehydration. Dry air in the office also can also increase out thirst and double the necessary daily fluid intake.

Many factors can increase our fluid requirements:

  • Heat and overheating
  • Very windy weather
  • Dry air, for example from heaters
  • Physical activity (such as strenuous physical work, playing sports, or long car journeys)
  • Fever
  • Vomiting or diarrhea