This brand is organic and uses 8 herbs. Has anyone tried it with good success?

I am trying to get my cat to live longer. She is 12, what the vet says is an average lifespan for a cat. She takes a med for liver & an iron supplement. I also took her off all dry cat food since it always has soy (a goitrogen) in it and she tested out borderline hypothyroid. She is now on raw hamburger (frozen 3 days to kill any parasites), sardines & tuna plus some canned food with no soy in it.

She stopped throwing up as before but keeps getting thinner & thinner. She looks like a cat costume on a hanger. She seems fairly active & happy, oddly.

I had tried Mountain Rose Essiac but it only has 4 herbs & from what I read Rene C. eventually was using 8 herbs.

This is all so confusing. Thanks if you can help my cat.