Too early to say really as I realised that the vehicle I was using for seti (stemoxydine, the cheap garner one) was becoming unstable after a few days, waiting on eth/PG in post. I am taking oral seti as well as a stop gap until I can sort out the vehicle, but it's not doing anything other than reducing my itch, topical is the way to go for efficacy.
I do think castor oil is having a positive effect as since I started using it topically with DMSO my hair has improved in density and overall appearance. But yeah too early to say how it's working as a whole yet.
It wont be stable in eth/pg either. I'm forced to make a fresh batch every day just to be sure.