Thanks for sharing this info.
I also did wonder about caffeine, in fact, I haven’t been taking coffee and tea specifically for this reason for maybe 1 or 2 months, just to try it out. So far, it goes well (not 100% free), and I was planning to take coffee again after this weekend.
What does help a lot of users is Soolantra. For me, is doesn’t result in being 100% free (maybe a 95% reduction, if the reduction is caused by Soolantra), but some say it does 100% for them, even when not using it anymore.
About a beard, @p1r473 did mention that growing a beard didn’t help for him in: Does yours spread?