I usually steer clear of weight loss issues but this was in the Guardian today
Beef from grass-fed cattle as in Argentina is fine, but not from corn-fed cattle as in the US.
[title changed to make it a question - stupid]
asked byHuntingBears (4176)
Get FREE instant access to our Paleo For Beginners Guide & 15 FREE Recipes!
on March 20, 2013
at 08:50 PM
I toured the Argo IL cornstarch plant about 10 years ago. The dry dent corn is resoaked to soften, then ground up and run over a filter screen to remove the coarse hulls. This is what they sold for cattle feed, because (as I remember) it had high protein content.
A lot of midwest farmers feed whole corn though.
Edit: Try as I might, I can't find ANY study which suggests that corn amino acids are a cause of differences in American meat quality. Lustig attacks cattle overfeeding with corn, which causes fat marbling, which makes cows similar to humans in being insulin resistant and sick. The purported low amino acid quality of corn-fed beef probably results from overfeeding with corn's main component, sugar-like cornstarch, and not from the corn's amino acids.
The inference of amino acid differences comes from a series of intuitive steps. I can find no scientific study to demonstrate whether it is true or not. I cannot find amino acid profiles for American vs Argentine beef for comparison either.