Not 6 but I just ended a run at 4iu/day of kefei. Great stuff for me, skin/hair/nails looked better, my joints felt better, and my fat loss was much improved, as was just my overall look. I started at 2iu/day and gradually worked up to 4... didn't feel i needed any more, plus it was my first run with GH. I will try to run GH with every cycle now, especially cutting, unless peptides work better for me. But I got great results on the Kefei, at least judging by others I talked to who have run many different types and doses of GH, so I'd say it was good stuff.