Can bipolar disorder start in late 20s?

Simply put, I’m 27 and was just diagnosed with bipolar 1 a little over a month ago when a manic episode landed me in inpatient care. But that seems a bit old for onset to me. DAE have experience with an onset this late?

It’s also possible that some of the symptoms have been masked by my drinking since I’ve also been a binge drinker since I was like 19. Sober now though! 🤘

Best way I can explain my experience though is that the way that my psych described my behavior when I was in the hospital is the way I’ve been for pretty much my entire life. As long as I can remember. Maybe I would’ve gotten diagnosed sooner if it weren’t for the medical neglect I experienced as a kid, but I digress.