Can Champagne Go Bad?

Champagne will last longer if it remains unopened. ... Unopened champagne will last: Three to four years if it is non-vintage; Five to ten years if it is a vintage.

Can old champagne make you sick?

Can old champagne make me sick? Old champagne (or any sparkling wine for that matter) will not make you sick (unless of course, you overindulge). ... If it looks unpleasant, smells unpleasant, and a few small drops on your tongue taste unpleasant, then yes, the wine has gone bad but won't make you sick.

How can I tell if my champagne has gone bad?

If you're champagne changes color and turned deep yellow or gold, chances are it's already bad. Improperly stored champagne can get contaminated and clumps may start to form in the liquid, which makes it spoiled. Spoiled champagne will taste and smell sour.