Table 5.

Normal water balance

Water input
 Ingested water1500
Water output
 Insensible lossesb (TEWLc and respiratory)800
  • TEWL, transepidermal water loss.

  • a Water generated in the body by the complete oxidation of carbohydrates, fats, and proteins.

  • b Water lost from the body that can be neither perceived nor measured directly.

  • c TEWL is the normal, constitutive loss of water vapor from the skin in the absence of sweat gland activity.