Scientific Testing done by Shaklee

I recently was in dialogue with someone who pushed me to prove why Shaklee products are worthwhile. How do we know for sure they are "naturally safe and proven effective"? What makes them different from any other company?

If you are interested, please look at this explanation from the Shaklee website. Read especially the part titled, "UNSURPASSED PRODUCT STANDARDS; TESTING THE LIMITS OF TESTING..." You can find the whole article HERE.