[CF#5]

This is all very interesting to me, since I've been using the GL chart for over 3 years, and there are some significant differences. I'd like to know which one is more accurate, and why there are such drastic differences. For romaine lettuce, GL states 36mg Ca/45mg Ph, this chart states 33mg Ca/30mg Ph.

More significant, for leafy lettuce (no differentiation between red and green) GL states 68mg Ca/25mg Ph, this chart states 36mg Ca/29mg Ph for green.

Also, when dealing with peppers, neither chart has any information for orange peppers, but the GL chart lists the same number of calories for green, red, and yellow peppers. The only differences between colors, according to GL, is the vitamin C content. The calorie content is not exactly the same as sugar content, but since there's relatively little fat and protein in peppers, it can be assumed that most of the calories come from sugars or other carbohydrates. Therefore, the GL chart basically says all colors of peppers are pretty much the same, while this one makes huge distinctions between all the colors.

Overall, this chart seems more specific, but I'm not sure that means it's also more accurate. The oxalic acid content for escarole differs greatly, although the vitamin C content, Ca, and Ph values are the same. And there are also similarities for green leaf lettuce (such as vitamin C content) but the Ca and Ph values are different. There has to be a significant amount of accuracy, because a tremendous percentage of the various values for different vegetables match up, but there are enough discrepancies to cause concern. How do I know which one is more accurate?