I would only recommend this diet for people with a high metabolism and who have a hard time gaining weight. Methionine is an essential amino acid and it would be detrimental if you completely eliminate it from your diet.
http://www.gnolls.org/1444/does-meat-rot-in-your-colon-no-what-does-beans-grains-and-vegetables/
http://www.gnolls.org/1444/does-meat-rot-in-your-colon-no-what-does-beans-grains-and-vegetables/