Alcohol and dehydration

I’ve heard all my life that alcohol causes dehydration. I have also heard that people in the Middle Ages often drank beer or cider because it was less likely to carry bacteria than the local water supply. I have also noticed that after drinking a moderate amount of beer (really!) my urine is almost colorless, a sign that I am NOT dehydrated. What’s the deal? This seems contradictory to me. Is it a matter of ABV or proof? I’m sure the sages on this site can set things straight for me.

Just a note that you may be in the wrong forum. I am thinking you wanted more General Questions; things with actual answers that are not directly related to this message board and its actions. If a Mod changes it, it isn’t any reflection on you - just trying for the best placement possible.

Moderator Action

Moving thread from ATMB to GQ.