Yeast for a Hangover Free Beer...........

[Cervantes]

Talking more about wine yeast, but this looks interesting...............

http://www.telegraph.co.uk/foodanddrink/foodanddrinknews/11479490/Hangover-proof-wine-is-finally-here.html

 

[DJ_L3ThAL]

Now they just need to alter the gene to remove the need for temperature control and sanitation!

 

[Dave70]

while at the same time reducing the toxic byproducts that cause hangovers

Congeners aside, that would be methanol. So we're still reaching for a Berocca / aspro cocktail the morning after the night before.
I dunno about all that gene fettling and trying to circumvent the fact that to much drink = sick . Sounds like the alcoholic equivalent of an E cigarette.