Energy

Definition

Energy, on a nutrition label, refers to the amount of calories provided by a food or drink, which our body uses to perform physical activities and maintain bodily functions.

Scientific / Technical Definition

Energy in nutritional terms is measured in kilocalories (kcal) or kilojoules (kJ), and represents the potential energy a food item can provide via macronutrients: carbohydrates, proteins, and fats. This energy fuels the body's metabolic processes, cellular functions, and physical activity.

Benefits

• Provides fuel for physical activity and daily tasks.
• Supports metabolic processes and body functions.
• Helps maintain body temperature.

Examples

• Bread provides carbohydrates, a major source of energy.
• Nuts are energy-dense foods due to their fat content.
• Fruit provides quick energy through natural sugars.

Additional Information

• Effects: Energy is essential for maintaining vital physiological processes like respiration, circulation, and cellular functions. An imbalance in energy intake and expenditure can lead to weight gain or loss.

Related Terms

• Calories
• Metabolism
• Macronutrients

References

• Understanding energy balance and obesity
• Dietary Guidelines for Americans