Living · 6 pages · 12 min
How hydration is not a gallon for everyone
Water balance follows size, heat, salt, and food, so one jug cannot fit every body.
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From the opening
Hydration is the balance of water against dissolved salts, in a body that also loses fluid through urine, breath, and sweat. It cannot be one gallon for everyone, because size, heat, work, and the water already inside food change both sides of the balance. The opening covers vasopressin guards blood concentration, volume loss uses a second loop, and food already holds a lot of water.
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Inside
- Vasopressin guards blood concentration
- Volume loss uses a second loop
- Food already holds a lot of water
- Water without salt can dilute sodium
- Where the idea stops applying
- A distinction worth keeping
Sources
- Vasopressin regulation of plasma osmolality
- Hyponatremia when large sweat losses are replaced with water alone