Global Bioweather

“we forecast your wellbeing”

Dehydration

Keywords: heat, dehydration in winter, sweating, thirst mechanism, hypothalamus, electrolytes, kidney failure, prevention

Abstract: Dehydration is defined as the loss of water and/or electrolytes from the body without adequate replenishment. Everyone loses more than one litre of fluid per day in urine and faeces, in breath, and in mild sweat without lifting a finger. The loss can reach two litres per hour if you work hard and sweat profusely. The first warning sign is a craving for anything liquid – thirst. This mechanism, however, is unreliable. Receptors in the brain react to variations in blood volume, electrolyte balance and cell pressure. But if the body loses a very high proportion of electrolytes, the craving for liquids diminishes or is not apparent at all.

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