Almost all their supplements have their contents verified by third party NSF among others. If we visit NSF’s website, and look at Consumerreports, I think we’ll find more info.
Some of their newer ones have more accreditions like USDA organic and non-GMO verifications. As with any supplements, if we stick to using the ones our body needs and not go overboard, we should be in a good position.
As a general rule, I avoid supplements from MLMs. And other things from MLMs.
These are third party verified, which means the labels are probably telling the truth. That being said, Herbalife is also third party verified, and has been shown to have a connection to liver damage.