My daughter and I both struggle with our weight, so I tried the 600mg version of this product, and she tried the 100mg version. We are both on a recognised 'Eating Plan', and my daughter in particular has done very well and has lost a lot of weight on this plan. So we thought that as Raspberry Ketones are the 'miracle fat burning supplement' that 'burn fat and boost the metabolism', we were on to a winner with these Pharmavits 100mg Raspberry Ketones Vitamin Supplements! Not so, I'm afraid. I've already reviewed the 600mg Extreme version, and my daughter has seen NO results whatsoever with the 100mg either!! She hasn't seen fat 'melting away', she hasn't experienced a 'boost in her metabolism' - in fact, she's experienced no improvement at all. Reading all the hype that accompanies Raspberry Ketones (and there's LOTS) you could be led to believe that here is a 'wonder weight loss supplement'.............well, not in our experience it isn't. If it works for you, that's fantastic, - but it didn't work for us, I'm afraid.