The amount of energy is typically measured in joules (J) or calories (cal). In nutritional contexts, energy in food is often expressed in kilocalories (kcal), where 1 kilocalorie is equivalent to 1,000 calories.
Food quantity is usually measured in grams (g) or kilograms (kg) for solid foods, and in milliliters (mL) or liters (L) for liquids. Additionally, servings or portion sizes can also be used to describe the amount of food consumed.
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