I agree with your criticism, at least against the article as written. By volume, potatoes (the 2nd option beyond leafy greens according to NASA) have 30x the c

I agree with your criticism, at least against the article as written. By volume, potatoes (the 2nd option beyond leafy greens according to NASA) have 30x the calories as lettuce. I don't see how the math could ever work out. In fact, potatoes might be a good optionally nutritionally. Chris Voigt went on an all potato diet for 60 days and seemingly suffered no ill effects: http://wholehealthsource.blogspot.com/2010/12/interview-with-chris-voigt-of-20.html http://wholehealthsource.blogspot.com/2010/12/interview-with... I wouldn't want to see someone try the same thing with lettuce.