Any question answered...

By non alchoholic I presume it will be lager.
You get hangovers from all the chemical shit in lager, not the alchohol.
You don't get hangovers from real ale, even the strong stuff.
Sure the alchohol will dehydrate you and you'll get a headache, and lose some sleeop, but a glass of water before bed will fix that.

Utter fucking rot.