Both my aunt & FIL suffered strokes that their doctors noted Herbalife as a major contributing factor of. I can't post links yet. But if you google "herbalife stroke" you will see several hits citing the same claim.
I tried to tell my inlaws about my aunt when they started taking it. They wouldn't listen. Said "it's different now". So I googled info for them. They still thought it was safe.
They fall for a lot of scammy things like that. It's sad.