Ididn't see it, but I just read about it online. I've heard before about fooling your metabolism by varying your calorie intake, and it sounds like that, plus the claim about helping your thyroid. I don't know about that.
A confusing thing was, the women who observed Faturday all ate close to 3000 calories or over, then Dr. Oz' plan for Faturday was only 1300-something calories.
I've been disappointed other times by the teasers of what's coming up on Dr. Oz.