Beans are low in fat and calories.
Meaning: This means that beans are a good food to eat if you're trying to lose weight or maintain a healthy weight.
Choice of Words: Low means not very much. Fat is a nutrient that your body needs in small amounts, but too much fat can be bad for you. Calories are units of energy in food. When you say "Beans are low in fat and calories," you mean that beans don't have a lot of fat or calories in them.
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