It's great that you can gain so much so quickly. At the beginning of the year I tried wonderup for 3 months with the same result that you got in 10 days! I've been travelling since then and haven't taken them in that time, but the good news is that I just measured myself today to see if the previous gain had stayed and found that I measured exactly the same as when I last took wonderup 4 months ago. I'm going to try them again now, as although I'm not a very fast responder the results certainly seem to last and that's very encouraging. I wasn't sure if they would.