I had a some luck with it for a while. The appetite suppression effect was noticeable at first, but eventually wore off - I was still taking the sugar water or oil but not losing weight. The diet is BILLED as "follow these steps and then eat whatever you want whenever you want and you'll still lose weight" - that was not my experience. I still had to diet quite deliberately to lose weight on SLD.
Following the Shangri-la forums, I notice that a lot of people lost SOME weight using his diet but practically nobody reached their ideal weight or anything near it. At best it's one tool in the toolbox, but in no way a "cure" for being overweight. I think the effect is real, and really hope somebody does more rigorous testing to figure out when and how the effect works so the diet can be made more effective/reliable/convenient, to the degree that's possible.
Following the Shangri-la forums, I notice that a lot of people lost SOME weight using his diet but practically nobody reached their ideal weight or anything near it. At best it's one tool in the toolbox, but in no way a "cure" for being overweight. I think the effect is real, and really hope somebody does more rigorous testing to figure out when and how the effect works so the diet can be made more effective/reliable/convenient, to the degree that's possible.