Interpreting a Nutrition Information Panel
A student compares two breakfast cereals. Cereal A per 100 g: energy 1,600 kJ, protein 8 g, fat 2 g, saturated fat 0.5 g, carbohydrate 75 g, sugars 25 g, sodium 400 mg, dietary fibre 6 g. Cereal B per 100 g: energy 1,550 kJ, protein 10 g, fat 3 g, saturated fat 1 g, carbohydrate 65 g, sugars 5 g, sodium 150 mg, dietary fibre 10 g. Cereal A's serving size is 30 g; Cereal B's is 45 g. Cereal A displays a Health Star Rating of 4; Cereal B displays 4.5. The student wants the 'healthier' choice for daily breakfast and asks whether the star rating settles it.
1. Compare the two cereals on a per-serving basis and explain why per-100 g figures can mislead.
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Per-serving comparison:
| Nutrient | A (30 g) | B (45 g) |
|---|---|---|
| Energy | 480 kJ | 698 kJ |
| Sugars | 7.5 g | 2.3 g |
| Fibre | 1.8 g | 4.5 g |
| Sodium | 120 mg | 68 mg |
| Protein | 2.4 g | 4.5 g |
Why per-100 g misleads: Serving sizes differ (30 g vs 45 g). Cereal A looks lower in sugar per 100 g than it is per serve relative to B, and B's fibre advantage is larger per serve than per 100 g suggests. A person eating a 45 g bowl of A would consume 11.3 g sugar.
Judgement point: Per-100 g is useful for like-for-like comparison, but per-serving reflects actual intake. The student should compare the amount actually eaten, not the label column that looks most favourable.
2. Assess whether the Health Star Rating should decide the choice, and identify what else the student should consider.
Read the worked answer
The star rating is a guide, not a verdict. It is calculated from a nutrient profile algorithm that balances energy, saturated fat, sodium and sugars against fibre, protein and fruit/vegetable/nut content. It is designed for comparing similar products within a category, which these are.
Limitations:
- It does not capture added sugar specifically; a product can score well despite moderate sugar.
- It does not reflect serving size, so a higher star rating does not mean a smaller or larger bowl.
- It does not account for the rest of the diet or individual needs (e.g. a person with high blood pressure may prioritise sodium).
What else to consider: Cereal B is lower in sugar and sodium and higher in fibre per serve, which aligns with dietary guidelines. However, if the student eats a larger serve of B, the energy intake rises. The student should also consider cost, taste and whether the cereal is eaten with milk or fruit.
Conclusion: The star rating supports B, and the per-serving data agree, so B is the better daily choice - but the student should check the serve size actually poured.