What will happen if I consume too much water?
Up to a quart of fluid can be excreted by
healthy kidneys every hour. Overdosing on alcohol can be harmful to your
health.
I understand how crucial it is to be
hydrated, but what happens if I consume a lot of water at once? Is it possible
to overindulge in alcohol?
The effects of drinking a lot of water
vary depending on your health, what you're doing at the time, and how much you
consider to be "too much."
Simply having to urinate more
frequently to get rid of the extra water is the most likely result.
However, it is possible to overdo it.
Up to a quart of fluid can be excreted by healthy kidneys every hour. If you
consume more than that, your body will retain the extra water, which can be
dangerous for your health and result in hyponatremia. When blood salt levels
fall below 130 mEq/L, more severe forms of hyponatremia can induce increasing
neurological symptoms such confusion, disorientation, seizures, and coma as
well as more serious symptoms like brain swelling.
An individual who took part in a radio
competition in California in 2007 where the winner was determined by how much
they could consume before having to urinate died from hyponatremia. The
contender apparently drank about two gallons of water in two hours, which is
definitely more than her kidneys could process—roughly two quarts, or a half
gallon, over that time. Students have also perished as a result of drinking too
much water while participating in fraternity hazing practises.
But it's vital to keep in mind that these are made-up scenarios
that the majority of people will never encounter.
Your body controls how much water you consume.
You must be aware of how our bodies
control the amount of water they contain in order to comprehend why this is
unlikely to occur in your everyday life. Both thirst and the hormone arginine
vasopressin (AVP, commonly known as anti-diuretic hormone) secreted by the
pituitary gland regulate the amount of water in the body.
On a hot summer day, perspiration loss
from being outside leads to progressive dehydration. AVP, which travels to the
kidneys and instructs them to conserve water, is released by the brain in
response to changes in blood concentration, most notably a rise in salt. As a
result, only very little urine is evacuated; it also darkens in colour and
becomes highly concentrated.
However, there comes a time when the
concentration of urine is insufficient to stop dehydration. Higher brain
centres become active to arouse thirst at that point.
The brain detects dehydration and
excessive water consumption through opposite changes in blood concentration,
primarily decreased sodium. The inhibition of AVP secretion signals the kidneys
to release more water. The extra water is then expelled in a significant amount
as very pale-colored, diluted pee.
You won't be thirsty either. However,
that isn't particularly useful: We don't typically hydrate ourselves while
we're thirsty. Instead, we often choose our liquids based on flavour (like my
daughter's fondness of Diet Coke), the necessity to drink alongside solid
foods, and desired side effects (like those of coffee and alcohol, for example).
However, there are some situations and
behaviours that might restrict how much urine the kidneys produce and your risk
of developing hyponatremia. Among these include illnesses like the syndrome of
improper antidiuretic hormone secretion, drugs like diuretics and
antidepressants, as well as exercise and nausea.
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