Haha Zambrodom, you summed it up perfectly.
Pills that claim they make you bigger are a scam. They're great for temporarily harder and fuller erections. But that's just because the ingredients in them increase blood flow and libido, etc, similar to viagra. You might see some small gains from pills if you're fully erect alot and are constantly waking up with raging (sore in the good way) morning wood every morning. But that's because it's a similar idea to jelqing... forcing blood into the tissue, expanding the tissue and making it stretch over time.
There's no ingredients that will specifically target your genitals and make the cells and tissue (in only the genitals, mind you!) stretch and expand, other than the tiny bit described above, and it's not because some magic herb is targeting one part of your body to make it grow. We don't have that science for any other part of our body, and certainly not for our genitals.
The best way to gain size, and especially if you want it to be permanent, is to do the exercises all over this forum. Good luck