I noticed that you also posted this on the liverflush facts forum, I would suggest to delete it there and instead put it on the liverflush support forum.
This has been discussed several times on the forums, so you could try to put it in the search box at the top of the page.
I thought I had read you could do it at that age but I could not find any posts besides these above. You could try the search box on the liverflush support forum, I did not try that and I know it was discussed in the last few years.