Do you have to permanently take natural thyroid?

I am 20 years old and have mild hypothyroidism. I am not keen on medication, but it’s gotten to the point where it is affecting my health. I don’t want to be on medication for life (synthroid, levo ect). I was browsing at the health store and came accross a "raw thyroid" from bovine. I kind of want to try this, but can you get on and off it or have to stay on it once you are on?