I had success losing weight last year with another brand (Miss Pep) of 10% fucoxanthin. Unfortunately that company no longer sells it (and their support offered no explanation why). I received this feedback form after only 14 days of use but decided to wait to respond because I know it takes time for it to work. Nothing happened for the first several weeks. Amazingly, after about five weeks (and even missing 2 or 3 days due to having visitors), weight is coming off. It I behaving precisely as it did when I took it last year. Note that I’m only taking one pill per day (and of course we all have our own diet and exercise plans). Two pills a day might work better, but it still takes a good 30 days to “build up” in your system before it starts working. (My experience.). Whatever it does to your metabolism, it definitely seems to kick in over time. Anyway, I’m very pleased and hope to stick with the one pill a day plan throughout the rest of this year and into next. (My weight usually creeps back up during the 3 winter months, so I’m looking forward to taking this over the winter months this year, now that I have a reliable supply.).