@KoiwiGal - That's not exactly true. I mean there is always a way to commercialize something and the popularity of Chinese herbal medicines in particular is proof of that. You can buy a whole range of them in stores and they are often more expensive than over the counter drugs.
I think the main reason that a lot of herbal remedies remain controversial is because they simply aren't as effective as modern medications. There's no point in testing the effectiveness of a particular root in curing headaches if there is already a pill that will definitely cure headaches much faster and more safely.
That's the other issue. With herbs it's almost impossible to ensure that you are getting a safe and effective dosage because every plant is different. If it's a strong medication, you could overdose. If it's a weak one, you might not have enough to make a difference.