Fat

Question 1

Types and structure: fats and oils

Answer 1

Fats are macronutrients that provide energy and essential fatty acids for the body. They are divided into different types based on their structure.

1. Saturated Fats
   • Structure: Contain only single bonds between carbon atoms.
   • Sources: Found mainly in animal products, such as butter, lard, cheese, cream, fatty meats, and also in some plant-based sources like coconut and palm oil.
   • Health effects: Excess saturated fat can raise LDL cholesterol (bad cholesterol), increasing the risk of heart disease.
2. Unsaturated Fats
   • Structure: Contain one or more double bonds between carbon atoms.
   • Types:
   • Monounsaturated fats – Found in olive oil, avocados, and nuts.
   • Polyunsaturated fats (PUFAs) – Found in sunflower oil, oily fish, and seeds.
   • Health benefits: Help reduce LDL cholesterol and increase HDL cholesterol (good cholesterol), reducing the risk of heart disease.

Question 2

Functions of Fat

Answer 2

Fat is essential for:
1. Energy source – Provides 9 kcal per gram, more than carbohydrates and protein.
2. Insulation – Helps maintain body temperature.
3. Protection – Surrounds and cushions vital organs.
4. Absorption of fat-soluble vitamins – Helps the body absorb vitamins A, D, E, and K.
5. Provides essential fatty acids (omega-3 and omega-6) – Important for brain function and reducing inflammation.

Question 3

Fat Deficiency

Answer 3

A lack of fat in the diet can lead to:
• Weight loss due to lack of stored energy.
• Feeling cold due to lack of insulation.
• Vitamin deficiencies (A, D, E, K), leading to poor skin, vision problems, and weak bones.
• Lack of essential fatty acids, affecting brain function and heart health.

Question 4

Animal and Vegetable Sources: Visible and Invisible Fats

Answer 4

1. Visible Fats (Easy to see and remove)
   • Animal sources: Butter, lard, fat on meat, cream.
   • Vegetable sources: Vegetable oils (olive oil, sunflower oil), margarine.
2. Invisible Fats (Hidden in foods, harder to detect)
   • Animal sources: Cheese, processed meats, pastries, chocolate.
   • Vegetable sources: Nuts, seeds, avocados.