"Fewer calories" refers to a smaller amount of energy provided by food or drink, which can be helpful for maintaining a healthy weight or losing weight. Full definition
You tend to eat fewer calories with quality food, because the food is full of nutrients. (fermented-foods.com)
Overall, you're still consuming fewer calories per day. (nerdfitness.com)
I love mixing spaghetti squash with regular spaghetti so that you get the same texture as pasta, but with fewer calories in every bite! (cookinglsl.com)