While we're discussing diets, I'll mention that many fruits have been selectively bred to increase sugars for decade after decade now. The result is that some are candy disguised as a fruit. The sugar is high enough that two zoos (AU & DE(?)) have had to heavily restrict the amount of fruit fed to the animals. IIRC, the new US food pyramid also demoted fruit a bit, but that is subject to heavy lobbying --so it probably should have been demoted even more.