https://www.yahoo.com/health/why-men...938590993.html
I'm in my 40s with a full head of hair but I've noticed more and more younger men including women losing their hair or going bald at a younger age these days.
Back when I was in college, I would notice maybe 1-2 guys in the classroom that have signs of receding hairline but today it seems be more common. Balding seems common for men in their 20s.
At my workplace, 25-60yr olds. Seems more than 1/2 of the guys are bald. Most of the ones that still have hair are actually in their 40-60s, strangely. Most of the bald guys are around late 20s to late 30s.
Of course this isn't scientific, it's more anecdotal evidence.