A 2010 study12 compared the effect of four different proteins: eggs, turkey, tuna and whey protein—on participants’ insulin levels. As expected, whey resulted in the highest insulin levels. Four hours afterward, participants were treated to a buffet lunch. The whey group ate substantially less than the other groups. The whey protein suppressed their appetites and increased their satiety. In other words, those subjects were “full.” See Figure 17.1.
