Never a problem for me. But I drink only German beers...as they adhere to The German Beer Purity Act.
https://en.wikipedia.org/wiki/Reinheitsgebot
"The Foodbabe" speaks about funky additives in other beers! I choose to avoid them but hey thats just me. It seemes people in the US love their Coors and Bud light, ACK !
http://foodbabe.com/2013/07/17/the-shocking-ingredients-in-beer/