In the case of leafy greens, most of the energy will be tied up in cellulose that will pass straight though a human digestive system undigested. Any model that

In the case of leafy greens, most of the energy will be tied up in cellulose that will pass straight though a human digestive system undigested. Any model that treats a human body as a perfectly efficient bomb calorimeter will produce such inaccurate results as to be virtually useless.