The Last Day You Can Still Eat Yogurt After Opening It - Chowhound

Since there's not really one simple rule for knowing when yogurt is still good to eat, you can judge for yourself instead of relying on sell-by dates. Firstly (and most obviously), if there's mold on the yogurt, it belongs in the trash. The mold won't necessarily be a "classic" green color. It can be gray or pink. Advertisement Beyond mold, there are some other slightly less obvious signs of spoilage to look out…