Cambridge (CIE) IGCSE Biology
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Diet & its Effects
Diet & Its Effects: Fueling Your Body the Right Way
What you eat affects how you feel, grow, and function. Your diet is like the fuel for your body, and a balanced one ensures you get all the nutrients needed to stay healthy.
What is a Balanced Diet?
A balanced diet includes the right proportions of all food groups to provide the nutrients your body needs for:
- Energy
- Growth
- Repair
- Healthy functioning
The Components of a Balanced Diet
Food Type | Sources | Function |
---|---|---|
Carbohydrates | Rice, bread, pasta, potatoes. | Provide energy. |
Fats and Oils | Butter, nuts, oils, fatty fish. | Store energy, insulate the body, and protect organs. |
Proteins | Meat, eggs, beans, fish. | Growth, repair, and making enzymes and hormones. |
Vitamins |
Vitamin C: Citrus fruits, tomatoes, leafy vegetables. Vitamin D: Sunlight, fish oil, egg yolks. |
Vitamin C: Healthy skin, gums, and healing wounds. Vitamin D: Strong bones and teeth (helps absorb calcium). |
Minerals |
Calcium: Milk, cheese, leafy greens. Iron: Red meat, spinach, lentils. |
Calcium: Strong bones and teeth. Iron: Makes hemoglobin, which carries oxygen in the blood. |
Fibre | Fruits, vegetables, whole grains. | Prevents constipation by aiding digestion. |
Water | Drinks, fruits, vegetables. | Hydration, transporting nutrients, and removing waste |
What Happens If You Lack Nutrients?
Scurvy (Vitamin C Deficiency):
- Causes: Lack of fresh fruits and vegetables.
- Symptoms: Bleeding gums, loose teeth, and poor wound healing.
Rickets (Vitamin D or Calcium Deficiency):
- Causes: Lack of sunlight or calcium-rich foods.
- Symptoms: Soft, weak bones that can bend (bowed legs).
Quick Reference: Nutrients and Their Effects
Nutrient | Function | Deficiency Effect |
---|---|---|
Carbohydrates | Provide energy | Fatigue |
Fats | Energy storage and insulation | Poor insulation, dry skin |
Proteins | Growth and repair | Stunted growth, weak muscles |
Vitamin C | Healthy skin and gums | Scurvy |
Vitamin D | Strong bones and teeth | Rickets |
Calcium | Strong bones and teeth | Weak bones, brittle nails |
Iron | Carries oxygen in blood | Anemia (fatigue, dizziness) |
Fibre | Aids digestion | Constipation |
Water | Hydration and transport | Dehydration (dizziness, dry skin) |
Tuity Tip
Hover me!
Balance is Key: Too much of one nutrient can be as bad as too little.
Colorful Plates: Eat a variety of colorful fruits and vegetables for vitamins and minerals.
Stay Hydrated: Water is essential—don’t forget it!
Check Your Plate: Aim for all food groups at each meal.
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