- Tanis, Vancouver
It's available as a supplement in some health food stores or online but is difficult to find.
One of the more established brands in North America is called Avosoy. It's marketed and distributed by Jason Theodosakis, MD, the author of The Arthritis Cure (St. Martin's Griffin, 2004). The company web site claims that the products are tested by a third-party lab. Customers can enter their product number to see the lab results for their product.
Although I prefer to rely on Consumerlabs.com for independent testing, they haven't analyzed avocado/soybean unsaponifiables yet, probably because there are so few products currently on the market.