Posted: 4/1/2015 10:57:53 PM EDT
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From wiki... "Non-ruminant herbivores produce vitamin B<small>12</small> from bacteria in their colons which again make the vitamin from simple cobalt salts. However the vitamin cannot be absorbed from the colon, and thus non-ruminants must ingest feces to obtain the nutrient. Animals that do not follow these methods of getting vitamin B<small>12</small> from their own gastrointestinal bacteria or that of other animals, must obtain the vitamin pre-made in other animal products in their diet, and they cannot benefit from ingesting simple cobalt salts." https://en.wikipedia.org/wiki/Cobalt ....wat? Can someone explain this a little better? |
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I got no idea on the ruminants, but I know in humans B12 must be bound to a protein produced by the stomach (intrinsic factor) to be absorbed by the intestine. Furthermore, the portion of intestine where B12+intrinsic factor is absorbed is the ileum, which is the last stop in the small intestine before the colon. So my WAG is that, if similar mechanisms exist in the animals under discussion, then if B12 is produced in the colon it will simply not be absorbed, as it is being produced after the part of the intestine that can absorb it. Hence the need for some sort of oral ingestion, be it feces or some other source. Again, may be talking out my ass here. But if I am, at least I'm in a good thread to do it.  |
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Quoted:
From wiki... "Non-ruminant herbivores produce vitamin B<small>12</small> from bacteria in their colons which again make the vitamin from simple cobalt salts. However the vitamin cannot be absorbed from the colon, and thus non-ruminants must ingest feces to obtain the nutrient. Animals that do not follow these methods of getting vitamin B<small>12</small> from their own gastrointestinal bacteria or that of other animals, must obtain the vitamin pre-made in other animal products in their diet, and they cannot benefit from ingesting simple cobalt salts." https://en.wikipedia.org/wiki/Cobalt ....wat? Can someone explain this a little better? Rabbits fall into this category if I'm not mistaken. |
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Not that complicated. Vitamin B12 is only made by bacteria. These bacteria only live in animals, usually after the part of the gut that can absorb it. Ruminant animals are ones that chew cud, like cows, deer, etc. Their gut moves food back to the beginning which conveniently lets them absorb the B12. Non-ruminant herbivores like rabbits need, ah, "external recirculation" to get it. Anything that eats meat gets it there. We can also synthesize it and a lot of processed grains are fortified now.
Which also means true natural food vegans have no source of B12. B12 deficiency literally slowly makes you go insane. |
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Quoted:
Not that complicated. Vitamin B12 is only made by bacteria. These bacteria only live in animals, usually after the part of the gut that can absorb it. Ruminant animals are ones that chew cud, like cows, deer, etc. Their gut moves food back to the beginning which conveniently lets them absorb the B12. Non-ruminant herbivores like rabbits need, ah, "external recirculation" to get it. Anything that eats meat gets it there. We can also synthesize it and a lot of processed grains are fortified now. Which also means true natural food vegans have no source of B12. B12 deficiency literally slowly makes you go insane. Came here to say this. Spot on By the way did you know that rabbits eat their own poop --- external circulation |
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Came here to say this. Spot on By the way did you know that rabbits eat their own poop --- external circulation Quoted:
Quoted:
Not that complicated. Vitamin B12 is only made by bacteria. These bacteria only live in animals, usually after the part of the gut that can absorb it. Ruminant animals are ones that chew cud, like cows, deer, etc. Their gut moves food back to the beginning which conveniently lets them absorb the B12. Non-ruminant herbivores like rabbits need, ah, "external recirculation" to get it. Anything that eats meat gets it there. We can also synthesize it and a lot of processed grains are fortified now. Which also means true natural food vegans have no source of B12. B12 deficiency literally slowly makes you go insane. Came here to say this. Spot on By the way did you know that rabbits eat their own poop --- external circulation My wife needs more b12!!! |
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Quoted:
Came here to say this. Spot on By the way did you know that rabbits eat their own poop --- external circulation Quoted:
Quoted:
Not that complicated. Vitamin B12 is only made by bacteria. These bacteria only live in animals, usually after the part of the gut that can absorb it. Ruminant animals are ones that chew cud, like cows, deer, etc. Their gut moves food back to the beginning which conveniently lets them absorb the B12. Non-ruminant herbivores like rabbits need, ah, "external recirculation" to get it. Anything that eats meat gets it there. We can also synthesize it and a lot of processed grains are fortified now. Which also means true natural food vegans have no source of B12. B12 deficiency literally slowly makes you go insane. Came here to say this. Spot on By the way did you know that rabbits eat their own poop --- external circulation known as "night feces"....its different than the little black pellets |
| I've been taking b-12 shots for about a year. Doc said some people lose their ability to get b-12 from food and I was one. Had to get it from injections. Don't know if it's snake oil or not but I trust Doc and I do feel better for a few days after the monthly shot. He told me I would have to take them from now on. |
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I've been taking b-12 shots for about a year. Doc said some people lose their ability to get b-12 from food and I was one. Had to get it from injections. Don't know if it's snake oil or not but I trust Doc and I do feel better for a few days after the monthly shot. He told me I would have to take them from now on. http://en.wikipedia.org/wiki/Pernicious_anemia |
