As with all supplements, unless you suffer a particular adverse reaction immediately, it will take time to measure and worthwhile benefits. To a large degree, the positive benefits are probably to do with whether you think it is doing what you want it to... Check out the 'placebo effect'. So provided the product ingredients are of a 'reasonable' quality (and not laced with a load of rubbish as sheer padding) and at an affordable price point, then no harm in trying it.I like the smell of this product when you opent the packet, but my partner doesn't; she still uses it though; because once it's mixed in with a drink or sprinkled in food, there is no problem.