Wait, is there a discussion going on that beer hydrates you? LOL. Beer that is 1 or 2ABV maybe but not the typical 4-5 ABV beer from everything I know. Beer is not as bad as drinking a shot of whiskey is... you are getting some water absorbed from the beer but you are going to pee out almost all hydration. My funny comment was people who argue that drinking a spiked water is hydration and can be substituted for a glass of water. Same as beer.
Although there’s no denying the tastiness and appeal of hard seltzers like White Claw, it’s worth remembering that people's claims about their supposed health benefits aren’t all they’re cracked up to be. Take, for instance, the many jokes circulating the internet about how “hydrating” White Claw is. Not to burst your bubble, but it’s, uh… not. This by no means a knock against White Claw itself, or even against hard seltzer more generally — it is, after all, delicious. Just don’t expect it to keep you hydrated as you imbibe; it’s no substitute for plain old water.
"Though hard seltzers are made with sparkling water, they still cause dehydration, based on the alcohol being a diuretic," Dr. Scott Braunstein, M.D., medical director of health provider Sollis Health, tells Bustle. "They impact hydration in the same way as other alcohols."
Studies have looked at whether alcoholic drinks are capable of being hydrating — and the results suggest that they can’t, really. A study published in the Journal of Applied Physiology in 1997 looked at whether there was a difference in recovery from dehydration induced by working out in the heat when consuming alcohol-free beverages versus beverages with alcohol. The researchers found that there was no difference in recovery between beverages that were alcohol-free and those which contained up to 2% alcohol; however, drinks containing 4% alcohol were found to “delay the recovery process.” This is why, Braunstein says, you need to drink water in between alcoholic beverages to prevent dehydration.