Herbal therapy and vitamin purity website...
 

While reading an article on Oncolink regarding chemobrain, they recommended this website called Consumerlab. "The website consumerlab.com independently tests herbal therapies and vitamins for purity. It charges a fee to join, but keeps them free from advertising influence and is minimal compared to the 34 billion dollars American consumers spend on alternative medicine every year." You might want to check them out.

Re: Herbal therapy and vitamin purity website...
 

Limited list per supplement..but nice to have some independent testing.