100% Hoodia Gordonii
Authentic hoodia gordonii is expensive. In an effort to cut corners and save money, some companies will use fillers and inactive parts of the hoodia plant so that they can get by using less hoodia gordonii. By doing this they can say their product contains authentic hoodia gordonii even though the actual amount may be minimal - and still charge you full price for it. Unfortuantely, it is nearly impossible to tell if a product contains fillers or inactive parts of the plant.
This is where independent lab tests are necessary as they will verify if the product contains 100% authentic hoodia gordonii.