Is it safe to eat cooked beef that is slightly sticky?

Generally speaking, whether slightly sticky cooked beef is still edible depends on the specific condition of spoilage. If in doubt or if discomfort occurs after consumption, it is recommended to seek medical attention promptly. The details are as follows:

If the cooked beef is only slightly sticky on the surface, has no unpleasant odor, remains firm and intact (not loose or crumbly), and hasn't darkened or turned gray in color, the stickiness is likely due to proteins and moisture exuding during refrigeration, forming a harmless mucus-like layer. In this case, the beef is generally safe to eat—just ensure thorough reheating before consumption.

However, if the beef feels excessively slimy, stretches noticeably when touched, emits sour or foul odors, becomes mushy and easily breaks apart when pressed, appears discolored or even shows signs of mold, it has already spoiled and should absolutely not be eaten, as consuming it may cause gastrointestinal discomfort.

It's best to consume cooked beef on the same day of purchase. Any leftovers should be portioned out promptly, sealed tightly, and stored in the refrigerator to minimize time spent at room temperature. Before eating refrigerated leftovers, carefully inspect their appearance and smell to determine safety. When reheating, ensure the beef is heated thoroughly to eliminate potential health risks caused by inadequate cooking.