As a child I had a duplex collective system. I had reflux into the kidney so I was operated on. This was 28 years ago. I have slight scarring on one kidney due to the reflux as a child. Apart from some chills, I am fine. I do need the toile a lot but I have been told this means my kidneys are working well and try not to take too much caffine. I have recently started taking Herbalife but have read reports that if you have had kidney problems not to use it.Am I alright to use it?

Thank you for your time.