General Principles-
- Energy Balance: A fundamental principle of nutrition is that energy intake from food must equal the body's energy needs. This principle is vital for maintaining a healthy weight and overall well-being.
- Nutrient Balance: A balanced diet requires the appropriate combination of:
- Proteins
- Fats
- Carbohydrates
- A commonly recommended ratio for these macronutrients is 1:1:4 (protein:fat:carbohydrates).
- Essential Nutrients: A daily menu should include the required amounts of:
- Vitamins
- Minerals
- Water
- Fiber
- Microelements
- Meal Timing: A regular eating schedule with appropriate spacing between meals is beneficial for digestion and nutrient absorption.
The energy requirements of a person vary based on factors like age, gender, weight, and activity level. For someone weighing 70 kg and living a highly inactive lifestyle, about 1,650 calories are needed to maintain basic bodily functions. However, even basic activities such as eating, sitting, or light movements increase energy usage, bringing the total to roughly 2,000 calories per day for a sedentary individual. On average, physical activities account for about 25% of total energy expenditure, although this can differ greatly from person to person based on their routine and lifestyle choices.