Okay, I have a little history regarding Dr Fong and Intermittent fasting, and the drink diet of the 1980's my aunt was on like Oprah. 1. Dr Fong did a short term study and in his book admitted that while the "diet" did help some (roughly 20%), it also propagated eating disorder like behavior. In the long term study the diabetes he claimed it would "cure", didn't. It seemed to work more for men (hormone related loss) than it did for women. And most folks found that after 'going off the diet' they gained their weight back and more. The intended eating idea of prolonged fasting unfortunately can cause binging and purging. 2. The liquid diet that Oprah was involved with in 1988 was an extreme diet that few if anyone could remain on for any length of time. According to the New York Times that featured this diet, found this: "Attention has been focused on these diets in the past week after Oprah Winfrey disclosed on her television talk show that a liquid protein diet program called Optifast had enabled her to shed 67 pounds since July. (1988 article)" Liquid formula diets were introduced two decades ago, but many were sold over the counter and were not medically supervised. At least 60 deaths were attributed to early formulas that had nutritional inadequacies. And while I agree that it has been years being revamped, etc. It is hard to believe like with the Keto diet (which was established for severe seizures), that the loose application of this diet is healthy. Russell Wilder found in 1921 that it was 'good to slow down seizure activity' but also concluded that it also causing brain starvation. We all have to do what is necessary to calm celiac's, I agree, yet I worry about these so called liquid diets and getting enough nutrients unless the person is getting their fruits and veg directly from organic farmers and juicing them within a day of being harvested.