I read an interesting discussion (I assume on here or linked from here) about reversing grey hair. It was actually about progress towards reversing aging, and h

I read an interesting discussion (I assume on here or linked from here) about reversing grey hair. It was actually about progress towards reversing aging, and how if we could reverse aging, we could surely reverse grey hair. And that there actually have been instances of people undergoing, I think chemotherapy or some other heavy medical treatment, that had their grey hair get its color back as a side effect. Anyway, it was quite interesting, if anyone knows what I'm talking about, please share. Unsurprisingly, it's not easy to google anything about reversing aging and get any real results.