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Pound for pound could mixed leafy greens be as energy dense as cooked lean meat?

by 10920 · March 15, 2014 at 02:33 PM

http://jn.nutrition.org/content/127/10/2000.full

Seems that fibers in leafy vegetables convert largely into O3 fatty acids in hominid models at a rate of approximately 170 calories per 100 grams. Does anyone have any evidence that humans can or cannot ferment these same amounts of fibers to equivelant amount of SCFAs?

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10069 · March 14, 2014 at 11:34 PM

I took raw spinach as a model leafy green. USDA lists 100g spinach as containing 23 calories using a normal human digestive system. Spinach is 91% water and even if the 9g dry solids was pure fat (which it's not - it's a mixture of digestible and indigestible carbs - 23 calories is consistent with 60% digestible carbs) you'd only have about 80 calories max. Maybe the report you're reading is on a dry solids basis.

http://ndb.nal.usda.gov/ndb/foods/show/3214?fg=&man=&lfacet=&format=&count=&max=25&offset=&sort=&qlookup=Spinach

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922 · March 15, 2014 at 02:29 PM

I am all for fermentable fiber, but why not do this study with, say, carrots, or apples? Also, I note that all animals (gorilla, deer, rabbit, goats) will graze tender growth first. I am mentioning this because IMO the amount of fermentable fiber varies widely in leaves. Unlike the other edibles I mentioned.

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922 · March 14, 2014 at 09:19 PM

All you need is a 30 meters long gut and you are all set. With only 7 meters, no.

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