I myself are 1. Problems Dutch people have! Largely due to a change in childhood diet and nutrition. Ever been inside a 16th century canal house? I created this website after being frustrated by finding nothing to wear in traditional malls.
Often times such supplements(like ones sold at WalMart) only contain 20 or less HCA- even when they are marked as higher(this was the conclusion of a recent study). Such low-grade products(like the ones from GNC usually) are basically scams, replete with fillers and additives and dont do much to give you the true benefits of the natural extract.
One of the biggest advantages of GC is its ability to prevent carbs from becoming fatty acids once inside the body- which is a result of the HCAs effects. Remember to take the dosage that is recommended on the bottle and do not deviate from it.
The best thing to go with is the Pure Garcinia Cambogia Extract brand, as these supplements contain a verified 60 HCA concentration and are 100 pure GC(the other 40 being other natural GC compounds such as Gorikapuli).