If I may add to that. I haven't been following hair loss scene for a year now. Different health problems...
I've been following the Parkinson's research scene closely...
@trialAcc is right. From a perspective of research science we still don't know the causes of all the sub variants of PD but just a few days ago BlueRock Therapeutics initiated dosing of stem cell replacement therapy for dopaminergic neurons.
We used to do this with fetal cell grafts but this is a whole other beast.
There is definitely progress. OF course we can't claim we are 3 years from having this kinds of treatments in clinic. But given no other big catastrophes happen (pandemics, climate change issues, major wars) 20 years is definitely an exaggeration.