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To convert from calories to kJ
One calorie (kcal) = 4.18 kJ
To convert from calories to kJ, multiply calories by 4.18.
For example, a medium-sized banana (118 grams) provides 105 calories (kcal). 105 x 4.18 = 439 kJ.
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Calories are a measure of energy
Calories are the amount of energy in foods and beverages, or the amount of energy you burn exercising.
Energy is measured in Kilocalories (kcal) and kilojoules (kJ). If you're counting calories or comparing the calorie contents of foods, this can cause confusion.
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1 kilocalorie = 1 calorie in nutrition
The term kilocalorie (kilo meaning 1,000) was created to refer to a large calorie. The term small calorie is only used in physics and chemistry research.
This means that with nutrition, the terms calories and kcal equal the same amount of energy (1 kilokalorie = 1 calorie in nutrition.)
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Small and large calories
Calories can be small or large.
- A large calorie estimates the amount of energy needed to raise the temperature of 1 kg (2.2 pounds) of water by 1°C (34°F).
- A small calorie estimates the amount of energy it takes to raise the temperature o...
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Banana nutrition facts
A medium banana provides the following nutrients:
- Calories: 105
- Protein: 1.29 grams
- Fat: 0.389 grams
- Carbohydrates: 26.9 grams
- Fibre: 3.07 grams
- Sugar
Small and large calories
Calories can be small or large.
- A large calorie estimates the amount of energy needed to raise the temperature of 1 kg (2.2 pounds) of water by 1°C (34°F).
- A small calorie estimates the amount of energy it takes to raise the temperature o...
Eating too few calories
Eating too few calories can cause a major decrease in metabolism.
Although a calorie deficit is needed for weight loss, it can be counterproductive for your calorie intake to drop too low. When you dramatically lower your calorie intake, your body senses that food is scarc...
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