In The Perfect Health Diet, the Jaminets point out that while a ruminant like a cow may each lots of carbohydrate in the form of indigestible fiber, what actually makes it into their blood stream is nearly pure fat, along with about 10% protein, thanks to the fermentation of fiber into short-chain fatty acids. (No link, sorry, and I can't find my copy to quote it directly.)
This ends, of course, when they're put on the feed lot, and they develop a nice layer of fat and fatty deposits in their muscles, if a grain-based diet doesn't kill them first.
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Wow. Very interesting - thanks!
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