kids Liver Cleansing?

I have a question - has anyone had a child do the liver cleanse? Now I've inquired with the Research Association and got a vague answer probubly due to not being able to give medical advice. I just want to know any suggestions from you. My kids have done the Para Cleanse and Kidney cleanses, but we all had a really rough winter with flu's. Even a vomiting flu/poisening which we haven't experienced in 7 yrs! So I know our health could still use improving. Ages are 7 & 9.
Thanks!!!
Angora