Not all supplements are created equal far from. The supplement industry is entirely unregulated. You may have caught a show on OPB which was detailing the technology of mass spectrometry and other technologies to identify components. As an example, they chose about 8 bottles of Ginko off the shelf at the store. Most were not Ginko at all, many had different fillers and glues added to them and the few that were Ginko did not have the amount they boasted to sell you their product.
So what's in that pill you just bought??
That's why it's important to buy quality supplements. You'll notice that they aren't the cheapest, but there is a reason for that. These not only will work the way they are intended because they contain what they say they contain, but they also do not contain other contaminants, heavy metals, glues and fillers. They are also taken from the best sources possible and are in the most bioavailable forms.
With so many terrible sources of vitamins and herbal supplements, it's no wonder why 50% of people who take a multivitamin are still deficient and why you may not have seen the results you were looking for.
Dive in and read up on these products because I carry the best brands.
