Nutritive and Dietetic Value (Junior Cert Home Economics): Revision Notes
Nutritive and Dietetic Value of Fruit
Nutritive Value (What nutrients fruit provides)
Nutritive Value: Focuses on the nutrients in fruit (e.g., vitamins, minerals, fibre, etc.).
- Low Protein: Fruit contains very little protein.
- Low Fat: Most fruits are fat-free, except for avocados and olives, which have unsaturated fat.
- Carbohydrates:
- Starch is found in unripe fruit but changes to sugar as the fruit ripens.
- Fruits are also a good source of fibre, particularly the skins of hard fruit such as apples.
- Vitamins:
- Fruits contain carotene (especially in brightly coloured fruits like peaches), which the body converts to vitamin A.
- B group vitamins and vitamin C are also present.
- Fruits contain antioxidants, which help protect against disease and skin ageing.
- Minerals:
- Calcium and iron are present in small amounts. Dried fruits contain more iron than fresh fruits.
- Bananas are a good source of potassium.
- Water: Fresh fruits have a high water content, while dried fruits have very little water.
Dietetic Value (How fruit fits into different diets)
Dietetic Value: Focuses on how fruit fits into specific diets or health conditions (e.g., vegan, low-calorie, pregnancy, etc.).
- Vegetarian/Vegan Diets: Fruit is important because it fits easily into plant-based diets.
- Low-Calorie and Low-Cholesterol Diets: Fruit is ideal for these diets because it's naturally low in calories and contains no cholesterol.
- High-Fibre Diets: Fruit is rich in fibre, which helps with digestion.
- Diabetic Diets: Some fruits contain high amounts of fructose (a natural sugar), so people with diabetes may need to limit their intake.
- Flavour and Texture: Fruits add colour, flavour, and texture to meals, making them more enjoyable and appealing.
Sample Exam Question:
Explain the difference between the nutritive and dietetic value of fruit. In your answer, provide two examples for each to show your understanding.
Model Answer:
The nutritive value of fruit refers to the nutrients it provides to the body. For example:
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Fruit contains vitamin C, which helps boost the immune system.
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Fruits are a source of fibre, which helps digestion and prevents constipation. The dietetic value of fruit refers to how fruit fits into different diets or health needs. For example:
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Fruit is useful in low-calorie diets because it is naturally low in fat and calories.
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Fruit is suitable for those suffering from bowel disorders such as constipation as it is high in fibre.