One of the surest signs of a food swamp is the presence of numerous fast-food restaurants within a small geographic radius. Food swamps do not lack options for buying food; there's just not healthy food. You can buy plenty of the greasy, low-nutrition food found at these chains. One study found that when fast-food options greatly outnumber grocery stores, people still buy more fast-food despite the availability of healthier choices.

If you look around and see convenience stores and gas stations, you might be living in a food swamp. Stores that sell pre-packaged foods like snack cakes, candy, and chips are also easily found in food swamps. The food sold at these stores may be high in calories, but low in the vitamins and nutrients that people need to stay healthy.

Fast-food and convenience stores outnumber healthy food options by about four-to-one in food swamps. These areas might have a few grocery stores, but they are not as convenient as the numerous options for purchasing unhealthy snacks. You might be in a food swamp if there is junk food on every corner, but it is almost impossible to find a larger grocery store.

Another sign you are in a food swamp is when the restaurants do not sell healthy meals. Some areas are not food swamps even though restaurants outnumber grocery stores. But in food swamps, the restaurants sell quick food that tends to be unhealthy. Diners, burger joints, and drive-through restaurants may be all over in a food swamp.

The restaurants do not sell salads or meals made with many fresh vegetables. Most of the food stores, even the ones that call themselves grocery stores, don't sell fresh vegetables either. Maybe there are a few vegetables for sale, but the quality is poor, and there isn't any variety. This is a sign you're in a food swamp. There is plenty of food, but fresh veggies aren't among your options.

If you want to cook a fresh meal, you're going to have to travel out of the food swamp for supplies. You might have a hard time finding whole grains, produce, or even fresh meat. Stores in food swamps mostly stock highly processed and preserved foods. These aren't the foods you need to make a healthy home-cooked meal.

A 2017 study found a correlation between obesity and food swamps. It seems that when junk food is much easier to get, people choose it even if a few healthy options are available. It makes sense that people don't want to spend time searching for food after a long day of work. They go for convenient items even when those are unhealthy. Los Angeles even tried to ban new fast-food restaurants in some neighborhoods to combat food swamps and improve public health.

Unfortunately, low-income neighborhoods are more likely to be food swamps than those with higher average incomes. Low-income neighborhoods often lack health food stores, trendy restaurants, and farmers markets that are popular in wealthier areas. Lower-income families might be more likely to work long hours and have less time and resources to cook meals at home. People in these areas are also less likely to have transportation to get food. A mile or two is a long way to go for groceries if you have no car.

You may have heard the term food desert before. Food swamps and food deserts are similar, but the terms can mean slightly different things. A food desert refers to any area that lacks access to fresh produce, meats, and other healthy foods. But food deserts don't necessarily have many food options at all. There may only be a single gas station selling some packaged foods. On the other hand, food swamps have tons of food for sale. The problem is that none of it is good for you.