My lager drinking began with Harp ( a fine Irish brew that tatstes more than a wee bit like beer, a fairly unique state for a lager), and pretty much all but ended the night I drank 6x carlsberg Special ( actually it was Bavaria86, exactly the same, stinking and lethal), and spent 1 hours doing the five minute walk to the bus station. Horrible.
No hangoverr's from German beer cos it has no impurities...MY BALLIX!!!
I have no doubt that additive free beer hurts less, but unless it's ALCOHOL free too, you should stand to suffer SOME ill effects, if nothing else because you have pissed all your water out and left your brain rolling round yer head like the pea in a referee's whistle.
The best cure for a hangover is the same as used for sunstroke.... a pint of water with 7-10 teaspoons of sugar in it and 2-3 of salt. With a hangover this has the added effect of making it 50-50 as to whether you evacuate your stomach contents, thus getting rid of any, as yet unmotabilized alcohol.
(PS, if you like drinking meths, drink diet coke instead, it (or rather the nutrasweet in it) turns into meths, then formaldahide(embalming fluid) in your stmach. )