The question becomes how you define "herbalism" and in what cultures? i.e. Chinese herbalism is different from Jamaican. That said, in the United States, you can become a registered herbalist with the American Herbalist Guild, which involves seeing at least 200 patients over 2 years, a board interview with case studies.

As for the supplements that are "lab tested" by a lab owned by the supplement industry, I can't speak for other companies, but I'm sure that happens, unfortunately. I know that we test ours by independent and good labs, though. I wish there was more transparency around this, but it's been up to the companies to be transparent and the consumer to seek the information.

Edit: Sorry, was off on one number, not 200. 80 patients over 2 years, 400 total hours of clinical experience.