Tons of information on line about hair loss/graying and alcoholism.
My personal experience is that hard drinking definitely causes hair to fall out. My addiction has morphed and changed over the years. The finals throws I became a hard bender drinker...drinking myself almost to death over a few days then staying sober for long stretches. No doubt, I would have a huge hair fall out after these benders. Haven't had one in a long time, hair is nice and thick.
I did start graying young but that's a family thing. I actually had no idea that boozing could cause graying but apparently it can! Who knew?
Restoring vitamin/mineral balance is key, especially the b vites. B1, 12, folate, Biotin. Talk to your dr about supplementation.