They are not tested by an outside agency to see if this delicate protein didn t decay when not refrigerated/preserved/stabilzed. The FDA approved one IS tested and IS refrigerated and has a SHORT expiration date. And is injected. Contact the company to find out their data on how they arrived at that formulation and what doses they tested. They won t provide it. then half or 1 tenth as much will probably do the same effect and be much less costly. Since it is likely fake. THen the larger issue is ultra low calorie dieting. Doesn t work. Ok, my medical school biochemistry teacher showed that the body moves from burning muscle to burning fat in 1 to 4 WEEKS of starvation not 6 days. Also, the rate of calorie burning drops very low very fast. So. 1) low calorie diets do not provide enough nutrients to be safe and serious vitamin deficiency diseases like Beri-Beri can occur within ONE WEEK of starvation if the person is doing everything wrong like exercising, stress, and caffeine loading. 2) low calorie diets lose muscle and not fat. This promotes lower metabolism and lower calorie burning. There is also adaptation to change hormones like thyroid to lower calorie burning further. 3) nobody stays with them by choice. Increased exercise with some overall muscle stimulation is needed along with mild starvation and with a simple cheap vitamin supplement. https://www.yyyyyyyyy.com/yyyy-Devil-Diet-Matt-yyyyyyyyyy/dp/0000000000000