It's permanent if you can't restore your natural levels. Hence the name, Hormone Replacement Therapy. If you can restore the natty then run a proper PCT after the cycle(s) and restore it. If 294 is the best you can do naturally then that's low in my book, I'd be taking TRT from the doc to keep it steadily in the upper range. But, if you stop, just be prepared to for your levels to drop down to the low range.