Yogurt usually has a relatively long shelf life, but at what point does it become unsafe? It really depends on the expiration date stamped on the container, which is either a "sell by" or "use by" date. Regardless, never eat yogurt that has a blue-green tint or smells or tastes unusually sour.

“Sell By” Date

Most yogurt is stamped with a “sell by” date rather than an expiration date. The yogurt should be good for about two weeks after the “sell by” date, according to Julie Garden-Robinson, a food and nutrition specialist at North Dakota State University.

“Use By” Date

Some brands stamp a "use by" date on their containers instead. Do not eat yogurt beyond this date because it could be unsafe.

Opened Container

After a container of yogurt has been opened, it should be tightly covered and eaten within 10 days. Keep in mind the expiration dates mentioned above, because they still apply.

Video of the Day