I sometimes ask myself this question. As a young adult I drank plenty of booze, smoked cigarettes and drank coffee. I did so in the years between 1981 and 1995, when my AF was first diagnosed. I wonder now, whether this lifestyle contributed to my early development of AF. It may have done. Certainly it would not have helped. I wish I had led a healthier lifestyle, free from those stimulants. Still, what is done, cannot be undone.
Now, I drink very little booze - in fact none since my last ablation - and I do miss wine and beer and Guinness, and vodka! I also miss coffee - though decaf seems to fool my simple brain. I suspect that I might be able to tolerate the odd coffee in due course. I don't miss smoking - and don't intend to light up ever again.
I think that alcohol in particular is surely a known cause of AF, and young folks should be informed of the risks of drinking too much.