Lettuce is a leafy green vegetable that is often used in salads, sandwiches, and other dishes. It is a good source of vitamins and minerals, but it can also be a breeding ground for bacteria. It is important to know how to tell if lettuce is bad before you eat it to avoid getting sick.
There are a few key signs that lettuce has gone bad. First, the leaves will start to wilt and turn brown. Second, the lettuce will become slimy to the touch. Third, the lettuce may develop an off smell. If you see any of these signs, it is best to throw the lettuce away.