It's been years since I bought Zone bars (back during my first stint in the Zone about a decade or so ago...long story). So, with a photo trip coming up that would likely have me up before the crack of dawn most days, I figured I better stock up on some for those early mornings out in the field before I could get back for breakfast...let alone the chances that I could find a Zone-friendly breakfast in the area). Wanting some variety, I ordered several of the sampler pack. I just looked over the nutritional listings on the bars, and must admit, I'm a bit confused. Here are the values I got, in terms of grams and Zone blocks:
Sweet & Salty Nut Crunch - 24C 17P (2.7 C blocks, 2.4 P blocks)
Chocolate Fudge - 25C 15P (2.8 C blocks, 2.1 P blocks)
Cocoa Crisp - 24C 16P (2.7 C blocks, 2.3 P blocks)
Iced Oatmeal Raisin - 26C 15P (2.9 C blocks, 2.1 P blocks)
Roasted Peanut - 23C 15P (2.6 C blocks, 2.1 P blocks)
On the face of it, some seem to be better-balanced than others. I would point out, in particular, that the Iced Oatmeal Raisin seems to have nearly 3 C blocks, but barely 2 P blocks.
But, wait...I recall reading in the early Zone books that you had to subtract the fiber grams from the carbohydrate grams to get a true C count. On the other hand, those books also mentioned that around 25% of protein grams from non-animal sources would not be absorbed by the body, so one would have to correct for that as well. Doing both of these, I came up with these revised figures:
Sweet & Salty Nut Crunch - 18C 13P (2.0 C blocks, 1.9 P blocks)
Chocolate Fudge - 22C 12P (2.4 C blocks, 1.7 P blocks)
Cocoa Crisp - 19C 12P (2.1 C blocks, 1.7 P blocks)
Iced Oatmeal Raisin - 22C 12P (2.4 C blocks, 1.7 P blocks)
Roasted Peanut - 21C 12P (2.3 C blocks, 1.7 P blocks)
Once again, there's quite a disparity. The Sweet & Salty Nut Crunch seems almost perfectly balanced. The Cocoa Crisp comes close, but still has almost half-a-block more carbohydrate than protein. The others seem even further out-of-whack, with nearly three-quarters of a block more carbohydrate than protein.
Based on this analysis, it would appear to me that only the Nut Crunch would be a good bet for staying in the zone without having to add more protein, which would be difficult to do out in the field. Is my analysis correct, or is there something I'm missing? Thanks in advance.