I tried to find it, but I couldn't. A few years ago, I believe that Consumer Reports did a test on vitamins. I was a subscriber at that time.
I remember that Shaklee got a very, very bad rating. They didn't do well in the tests (I can't remember whether it was in absorbtion, or whether it was in consistency of amounts or both). They were also one of the most expensive brands tested.
Their expense plus their failure of some of the tests gave them a "poor" rating. I remember this distinctly because a friend of mine was selling Shaklee. That report plus the fact that I can't stand multi-level marketing, convinced me to pass on their products.
I'm not willing to get into a debate about this. I have nothing personally against Shaklee, and I know that there are a lot of people who like their products. I'm just passing on a tidbit that I remember about them.