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Can I get fresh water from ocean fish flesh?
Clash Royale CLAN TAG#URR8PPP
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Ocean water has about 35 Grams of salt per liter. For the human body salt content in body fluids is about 9 Grams per liter. See related question How much sea water can I safely drink?
While it is best that your fresh water only contain very trace amounts of salt, water that is equal or less than 9 grams of salt per liter can help maintain your hydration level (trying to simplify a complex concept)
Many desert animals get all most of their hydration from food
If stranded at sea, and I eat a lot of fish flesh. Will it have a low enough salt content to help keep me hydrated?
survival sea water
asked 5 hours ago
James Jenkins
15.9k554147
add a comment |Â
up vote
6
down vote
favorite
Ocean water has about 35 Grams of salt per liter. For the human body salt content in body fluids is about 9 Grams per liter. See related question How much sea water can I safely drink?
While it is best that your fresh water only contain very trace amounts of salt, water that is equal or less than 9 grams of salt per liter can help maintain your hydration level (trying to simplify a complex concept)
Many desert animals get all most of their hydration from food
If stranded at sea, and I eat a lot of fish flesh. Will it have a low enough salt content to help keep me hydrated?
survival sea water
asked 5 hours ago
James Jenkins
15.9k554147
I think the real question is whether it will have a high enough water content.
– Olin Lathrop
4 hours ago
@OlinLathrop both fish and land animals are 70-75% water content in muscle (meat)
– James Jenkins
3 hours ago
Related outdoors.stackexchange.com/questions/20616/…
– Charlie Brumbaugh
1 hour ago
add a comment |Â
up vote
6
down vote
favorite
up vote
6
down vote
favorite
Ocean water has about 35 Grams of salt per liter. For the human body salt content in body fluids is about 9 Grams per liter. See related question How much sea water can I safely drink?
While it is best that your fresh water only contain very trace amounts of salt, water that is equal or less than 9 grams of salt per liter can help maintain your hydration level (trying to simplify a complex concept)
Many desert animals get all most of their hydration from food
If stranded at sea, and I eat a lot of fish flesh. Will it have a low enough salt content to help keep me hydrated?
survival sea water
asked 5 hours ago
James Jenkins
15.9k554147
Ocean water has about 35 Grams of salt per liter. For the human body salt content in body fluids is about 9 Grams per liter. See related question How much sea water can I safely drink?
While it is best that your fresh water only contain very trace amounts of salt, water that is equal or less than 9 grams of salt per liter can help maintain your hydration level (trying to simplify a complex concept)
Many desert animals get all most of their hydration from food
If stranded at sea, and I eat a lot of fish flesh. Will it have a low enough salt content to help keep me hydrated?
survival sea water
survival sea water
asked 5 hours ago
James Jenkins
15.9k554147
asked 5 hours ago
James Jenkins
15.9k554147
asked 5 hours ago
James Jenkins
15.9k554147
asked 5 hours ago
James Jenkins
15.9k554147
asked 5 hours ago
James Jenkins
15.9k554147
15.9k554147
I think the real question is whether it will have a high enough water content.
– Olin Lathrop
4 hours ago
@OlinLathrop both fish and land animals are 70-75% water content in muscle (meat)
– James Jenkins
3 hours ago
Related outdoors.stackexchange.com/questions/20616/…
– Charlie Brumbaugh
1 hour ago
add a comment |Â
I think the real question is whether it will have a high enough water content.
– Olin Lathrop
4 hours ago
@OlinLathrop both fish and land animals are 70-75% water content in muscle (meat)
– James Jenkins
3 hours ago
Related outdoors.stackexchange.com/questions/20616/…
– Charlie Brumbaugh
1 hour ago
I think the real question is whether it will have a high enough water content.
– Olin Lathrop
4 hours ago
I think the real question is whether it will have a high enough water content.
– Olin Lathrop
4 hours ago
@OlinLathrop both fish and land animals are 70-75% water content in muscle (meat)
– James Jenkins
3 hours ago
@OlinLathrop both fish and land animals are 70-75% water content in muscle (meat)
– James Jenkins
3 hours ago
Related outdoors.stackexchange.com/questions/20616/…
– Charlie Brumbaugh
1 hour ago
Related outdoors.stackexchange.com/questions/20616/…
– Charlie Brumbaugh
1 hour ago
add a comment |Â
1 Answer
1
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5
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Let's say you lose 2 liters of water per day. To replace 2 liters of water by eating fish, you need to eat, for example, 2,500 g of cooked Pacific cod, which, besides water, also contains 500 g of protein and 3.4 g of sodium.
3.4 g of sodium is not that much; many people consume this amount every day and I assume this does not result in significantly increased water loss through the kidneys (diuresis).
The bigger concern is protein, which is broken down into urea, which is excreted through the kidneys and drags some water with it in a similar way as sodium does.
1 gram of protein yields the amount of urea that needs 8 mL of urine to be excreted (see the source below). Consuming 500 g of protein from fish would therefore result in 4 liters of urine. With consuming only 2 liters of water by fish, this leaves you with 2 liters of negative water balance solely due to urea.
So, if my calculation is correct, you can't maintain good hydration by eating only fish.
Source: NAP.edu
Urea, a major end product of metabolism of dietary proteins and amino
acids, requires water for excretion by the kidneys. Renal excretion of
1 g of urea nitrogen (2.2 g of urea) requires 40 to 60 mL of water.
Thus, if a person consumes 63 g of protein the volume of water
required increases by 0.4 to 0.6 L/day above the basal osmolar
excretory requirement of 0.5 and 0.75 L/day in younger and older
individuals, respectively.
answered 4 hours ago
Jan
50937
+1 I like your answer, and it seems reasonable. But this article about dolphins focus on salt as an issue not urea so I wonder if people have just been overlooking urea excretion in relatship to dehydration?
– James Jenkins
2 hours ago
If someone consumes about 60 grams of protein per day (the amount mentioned in the quoted part of my answer) he/she will excrete about 500 mL of urine as a result. We always consume some protein, so we are used to that and no one makes a problem from urea. But when you switch from 60 to 500 g of protein per day (in a fish-only-eating scenario), the amount of urea and hence urine greatly increases.
– Jan
2 hours ago
1
About salt: there is much lower amount of salt in fish than in seawater and it's comparable to other foods. With other words: neither the amount of salt and protein we usually consume result in dehydration, because we usually regularly consume some water as well.
– Jan
2 hours ago
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
5
down vote
Let's say you lose 2 liters of water per day. To replace 2 liters of water by eating fish, you need to eat, for example, 2,500 g of cooked Pacific cod, which, besides water, also contains 500 g of protein and 3.4 g of sodium.
3.4 g of sodium is not that much; many people consume this amount every day and I assume this does not result in significantly increased water loss through the kidneys (diuresis).
The bigger concern is protein, which is broken down into urea, which is excreted through the kidneys and drags some water with it in a similar way as sodium does.
1 gram of protein yields the amount of urea that needs 8 mL of urine to be excreted (see the source below). Consuming 500 g of protein from fish would therefore result in 4 liters of urine. With consuming only 2 liters of water by fish, this leaves you with 2 liters of negative water balance solely due to urea.
So, if my calculation is correct, you can't maintain good hydration by eating only fish.
Source: NAP.edu
Urea, a major end product of metabolism of dietary proteins and amino
acids, requires water for excretion by the kidneys. Renal excretion of
1 g of urea nitrogen (2.2 g of urea) requires 40 to 60 mL of water.
Thus, if a person consumes 63 g of protein the volume of water
required increases by 0.4 to 0.6 L/day above the basal osmolar
excretory requirement of 0.5 and 0.75 L/day in younger and older
individuals, respectively.
answered 4 hours ago
Jan
50937
+1 I like your answer, and it seems reasonable. But this article about dolphins focus on salt as an issue not urea so I wonder if people have just been overlooking urea excretion in relatship to dehydration?
– James Jenkins
2 hours ago
If someone consumes about 60 grams of protein per day (the amount mentioned in the quoted part of my answer) he/she will excrete about 500 mL of urine as a result. We always consume some protein, so we are used to that and no one makes a problem from urea. But when you switch from 60 to 500 g of protein per day (in a fish-only-eating scenario), the amount of urea and hence urine greatly increases.
– Jan
2 hours ago
1
About salt: there is much lower amount of salt in fish than in seawater and it's comparable to other foods. With other words: neither the amount of salt and protein we usually consume result in dehydration, because we usually regularly consume some water as well.
– Jan
2 hours ago
add a comment |Â
up vote
5
down vote
Let's say you lose 2 liters of water per day. To replace 2 liters of water by eating fish, you need to eat, for example, 2,500 g of cooked Pacific cod, which, besides water, also contains 500 g of protein and 3.4 g of sodium.
3.4 g of sodium is not that much; many people consume this amount every day and I assume this does not result in significantly increased water loss through the kidneys (diuresis).
The bigger concern is protein, which is broken down into urea, which is excreted through the kidneys and drags some water with it in a similar way as sodium does.
1 gram of protein yields the amount of urea that needs 8 mL of urine to be excreted (see the source below). Consuming 500 g of protein from fish would therefore result in 4 liters of urine. With consuming only 2 liters of water by fish, this leaves you with 2 liters of negative water balance solely due to urea.
So, if my calculation is correct, you can't maintain good hydration by eating only fish.
Source: NAP.edu
Urea, a major end product of metabolism of dietary proteins and amino
acids, requires water for excretion by the kidneys. Renal excretion of
1 g of urea nitrogen (2.2 g of urea) requires 40 to 60 mL of water.
Thus, if a person consumes 63 g of protein the volume of water
required increases by 0.4 to 0.6 L/day above the basal osmolar
excretory requirement of 0.5 and 0.75 L/day in younger and older
individuals, respectively.
answered 4 hours ago
Jan
50937
+1 I like your answer, and it seems reasonable. But this article about dolphins focus on salt as an issue not urea so I wonder if people have just been overlooking urea excretion in relatship to dehydration?
– James Jenkins
2 hours ago
If someone consumes about 60 grams of protein per day (the amount mentioned in the quoted part of my answer) he/she will excrete about 500 mL of urine as a result. We always consume some protein, so we are used to that and no one makes a problem from urea. But when you switch from 60 to 500 g of protein per day (in a fish-only-eating scenario), the amount of urea and hence urine greatly increases.
– Jan
2 hours ago
1
About salt: there is much lower amount of salt in fish than in seawater and it's comparable to other foods. With other words: neither the amount of salt and protein we usually consume result in dehydration, because we usually regularly consume some water as well.
– Jan
2 hours ago
add a comment |Â
up vote
5
down vote
up vote
5
down vote
Let's say you lose 2 liters of water per day. To replace 2 liters of water by eating fish, you need to eat, for example, 2,500 g of cooked Pacific cod, which, besides water, also contains 500 g of protein and 3.4 g of sodium.
3.4 g of sodium is not that much; many people consume this amount every day and I assume this does not result in significantly increased water loss through the kidneys (diuresis).
The bigger concern is protein, which is broken down into urea, which is excreted through the kidneys and drags some water with it in a similar way as sodium does.
1 gram of protein yields the amount of urea that needs 8 mL of urine to be excreted (see the source below). Consuming 500 g of protein from fish would therefore result in 4 liters of urine. With consuming only 2 liters of water by fish, this leaves you with 2 liters of negative water balance solely due to urea.
So, if my calculation is correct, you can't maintain good hydration by eating only fish.
Source: NAP.edu
Urea, a major end product of metabolism of dietary proteins and amino
acids, requires water for excretion by the kidneys. Renal excretion of
1 g of urea nitrogen (2.2 g of urea) requires 40 to 60 mL of water.
Thus, if a person consumes 63 g of protein the volume of water
required increases by 0.4 to 0.6 L/day above the basal osmolar
excretory requirement of 0.5 and 0.75 L/day in younger and older
individuals, respectively.
answered 4 hours ago
Jan
50937
Let's say you lose 2 liters of water per day. To replace 2 liters of water by eating fish, you need to eat, for example, 2,500 g of cooked Pacific cod, which, besides water, also contains 500 g of protein and 3.4 g of sodium.
3.4 g of sodium is not that much; many people consume this amount every day and I assume this does not result in significantly increased water loss through the kidneys (diuresis).
The bigger concern is protein, which is broken down into urea, which is excreted through the kidneys and drags some water with it in a similar way as sodium does.
1 gram of protein yields the amount of urea that needs 8 mL of urine to be excreted (see the source below). Consuming 500 g of protein from fish would therefore result in 4 liters of urine. With consuming only 2 liters of water by fish, this leaves you with 2 liters of negative water balance solely due to urea.
So, if my calculation is correct, you can't maintain good hydration by eating only fish.
Source: NAP.edu
Urea, a major end product of metabolism of dietary proteins and amino
acids, requires water for excretion by the kidneys. Renal excretion of
1 g of urea nitrogen (2.2 g of urea) requires 40 to 60 mL of water.
Thus, if a person consumes 63 g of protein the volume of water
required increases by 0.4 to 0.6 L/day above the basal osmolar
excretory requirement of 0.5 and 0.75 L/day in younger and older
individuals, respectively.
answered 4 hours ago
Jan
50937
edited 3 hours ago
answered 4 hours ago
Jan
50937
answered 4 hours ago
Jan
50937
answered 4 hours ago
Jan
50937
50937
+1 I like your answer, and it seems reasonable. But this article about dolphins focus on salt as an issue not urea so I wonder if people have just been overlooking urea excretion in relatship to dehydration?
– James Jenkins
2 hours ago
If someone consumes about 60 grams of protein per day (the amount mentioned in the quoted part of my answer) he/she will excrete about 500 mL of urine as a result. We always consume some protein, so we are used to that and no one makes a problem from urea. But when you switch from 60 to 500 g of protein per day (in a fish-only-eating scenario), the amount of urea and hence urine greatly increases.
– Jan
2 hours ago
1
About salt: there is much lower amount of salt in fish than in seawater and it's comparable to other foods. With other words: neither the amount of salt and protein we usually consume result in dehydration, because we usually regularly consume some water as well.
– Jan
2 hours ago
add a comment |Â
+1 I like your answer, and it seems reasonable. But this article about dolphins focus on salt as an issue not urea so I wonder if people have just been overlooking urea excretion in relatship to dehydration?
– James Jenkins
2 hours ago
If someone consumes about 60 grams of protein per day (the amount mentioned in the quoted part of my answer) he/she will excrete about 500 mL of urine as a result. We always consume some protein, so we are used to that and no one makes a problem from urea. But when you switch from 60 to 500 g of protein per day (in a fish-only-eating scenario), the amount of urea and hence urine greatly increases.
– Jan
2 hours ago
1
About salt: there is much lower amount of salt in fish than in seawater and it's comparable to other foods. With other words: neither the amount of salt and protein we usually consume result in dehydration, because we usually regularly consume some water as well.
– Jan
2 hours ago
+1 I like your answer, and it seems reasonable. But this article about dolphins focus on salt as an issue not urea so I wonder if people have just been overlooking urea excretion in relatship to dehydration?
– James Jenkins
2 hours ago
+1 I like your answer, and it seems reasonable. But this article about dolphins focus on salt as an issue not urea so I wonder if people have just been overlooking urea excretion in relatship to dehydration?
– James Jenkins
2 hours ago
If someone consumes about 60 grams of protein per day (the amount mentioned in the quoted part of my answer) he/she will excrete about 500 mL of urine as a result. We always consume some protein, so we are used to that and no one makes a problem from urea. But when you switch from 60 to 500 g of protein per day (in a fish-only-eating scenario), the amount of urea and hence urine greatly increases.
– Jan
2 hours ago
If someone consumes about 60 grams of protein per day (the amount mentioned in the quoted part of my answer) he/she will excrete about 500 mL of urine as a result. We always consume some protein, so we are used to that and no one makes a problem from urea. But when you switch from 60 to 500 g of protein per day (in a fish-only-eating scenario), the amount of urea and hence urine greatly increases.
– Jan
2 hours ago
1
1
About salt: there is much lower amount of salt in fish than in seawater and it's comparable to other foods. With other words: neither the amount of salt and protein we usually consume result in dehydration, because we usually regularly consume some water as well.
– Jan
2 hours ago
About salt: there is much lower amount of salt in fish than in seawater and it's comparable to other foods. With other words: neither the amount of salt and protein we usually consume result in dehydration, because we usually regularly consume some water as well.
– Jan
2 hours ago
add a comment |Â
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I think the real question is whether it will have a high enough water content.
– Olin Lathrop
4 hours ago
@OlinLathrop both fish and land animals are 70-75% water content in muscle (meat)
– James Jenkins
3 hours ago
Related outdoors.stackexchange.com/questions/20616/…
– Charlie Brumbaugh
1 hour ago