The most important thing to remember is that everyone's situation is different. To be honest, I find it quite disturbing that this is even something you were contemplating. But of course you're not the first person to make these claims and remarks about haidut and you certainly wont be the last, which is disappointing.@haidut has more knowledge than all of us here combined.
Haidut literally produces research chemicals, dozens of them, which according to Roddy and himself would further help on top of the lifestyle stuff.
In other words, there is no other person on planet earth that, if Roddy/Peat/Haidut was correct about hairloss, should have a better chance regrowing their hair. He knows a LOT. He has UNBELIEVABLE access to peaty chemicals/hormones etc.
So let me ask one question:
Why do you @haidut not regrow your hair? This will end the debate and I will be the first one here to shut up.
Is it, because, you can't? Or you don't want to?
Its very clear that you don't know anything about haiduts history and personal life, which he has talked about far more than he should ever have to. From what I remember him saying on various podcasts, he lost all of his hair at the peak of his paleo diet and then regrew 60% of it, some of which comes and goes with the summer and winter cycles.
He also said that he has stress that he cant avoid, which is why he cant keep the regrowth. He works up to, or exceeding, 12 hours a day on top of having a family and kids to look after and be responsible for. ALL while researching and studying for hours and posting his findings here to help countless people for FREE. His hair loss reversal already mentioned is pretty remarkable in and of itself, especially after the stress he put his body through with a low carb diet, chronic over exercise and extreme work stress. I believe the doctors and neurologists at the time tried to diagnose his condition as multiple sclerosis, which got worse and worse with time until he discovered Ray Peat.
You also need to remember that there is calcification involved in hair loss that requires mechanical actions such as topicals, scalp massaging, headstands, red light, scalp exercises which have been a integral part of peoples hair loss recovery. On top of everything you mentioned with chemicals, diet, hormones whatever, these mechanical actions take time. Something which some people simply cant create.
I hope that this will remind you next time to think more about this - everyone has their own unique situation, with different goals, desires, intentions and PRIORITIES.