What happens to a beer when the expiration date passes?

I know it has a different taste but I want to know what actually becomes wrong with the beer.|||the dates on beer is NOT an expiriation date





there are 2 dates common on alcoholic beverages:


born on dates, which is the date they are bottled


and "freshness dates" which is the date they put on for distribution and sales reasons





its a way for manufacturers to move product off retail shelves, and make sure retailers get rid of the older stuff 1st.





technically speaking most beer brewers belive the optimum age of a beer is to consume within 6 months of bottling... after that the taste might not be quite a fresh, but still is consumable. there are beers people find that are hundreds of years old and drinkable.|||Nothing really, it just gets old over time. You can drink beer that's past the expiration date, which is why some just do "born on" dates.....it doesn't really matter.|||nothing as long as you haven't opened it. it might begin to lose it's carbonation.|||probably the alcohol goes rotten|||skunkorama