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It increases thevolume of food and helps to feel full longer. That is why vegetables, whole fruits, legumes and whole grains are often used in this diet.

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It is on this basis that volume eating, or volumetric nutrition, is based. Its essence is simple, to choose more products that take up a lot of space on the plate, but have a relatively low calorie content. These are primarily vegetables, fruits, berries, and other foods that are high in water and fiber.

That is why a large bowl of vegetable salad and a small pack of chips can vary greatly in caloric content, although visually the salad will be much larger.