My friends told me about this long time ago, but i've decided to try it to see if it really works, first day wasn't that good, barely lot 200 grams, but i was really surprises the second day when i've lost 2kg in a nigh, i though it was just water but the third day i was at 3kg losts! Then it got a bit more stable/gained a bit more until i had lost a total of 8 kgs within 7 days, well i was extenuated because I've also done 1 hour of walking daily in parallel, but i think it's worth it!