📊 Full nutrition facts — per 100g
| Nutrient | Amount | % Daily value | Level |
|---|---|---|---|
| Calories | 47 kcal | 2% | |
| Vitamin C | 53.2mg | 59% | |
| Carbohydrates | 11.8g | 4% | |
| Sugars | 9.4g | — | |
| Glycaemic Index (GI) | 40 — Low | — | |
| Dietary fibre | 2.4g | 9% | |
| Folate | 30µg | 8% | |
| Potassium | 181mg | 4% | |
| Calcium | 40mg | 3% | |
| Thiamine (B1) | 0.09mg | 7% | |
| Hesperidin | 68mg | — | |
| Beta-cryptoxanthin | 116µg | — |
Based on Australian Nutrient Reference Values (NRV). Source: FSANZ Australian Food Composition Database & USDA FoodData Central.
📈 Glycaemic index (GI)
💊 Key vitamins & minerals
✅ Health benefits
A single orange provides 59% of daily vitamin C, essential for immune cell production, collagen synthesis, wound healing and defence against oxidative stress from infection.
The flavonoid hesperidin — found primarily in the white pith — reduces blood pressure and inflammation. Regular citrus consumption is associated with 19% lower cardiovascular disease risk in large population studies.
Vitamin C dramatically enhances non-haem iron absorption from plant foods. Drinking orange juice or eating an orange with iron-rich meals can increase iron absorption by up to 300% — one of the most practical nutritional pairings available.
Oranges provide 8% of daily folate needs per fruit — critical for neural tube development in early pregnancy — alongside vitamin C which supports placental development and immune function.
⚠️ Who should limit or avoid this food
Oranges are highly acidic (pH 3.3–4.2). For people with reflux or GERD, oranges and especially orange juice can significantly worsen symptoms. Eat with food or choose lower-acid varieties like Navel.
Grapefruit interactions are well-known, but regular oranges can also interact with some statins, blood pressure medications and immunosuppressants due to furanocoumarin compounds. Ask your pharmacist.
Citric acid in oranges can erode enamel with frequent exposure. Rinse with water after eating and wait 30 minutes before brushing — brushing immediately after acid exposure worsens enamel damage.
Orange juice has a significantly higher GI than whole oranges (50–65 vs 40) because fibre is removed during juicing. People managing blood sugar should always choose whole fruit over juice.
🔬 Possible side effects or risks
Citric and ascorbic acid can trigger or worsen reflux in susceptible people, especially when consumed on an empty stomach.
Regular large quantities of orange juice without rinsing can slowly erode dental enamel over months to years.
Very large amounts of orange consumption over extended periods can cause harmless yellowing of skin from beta-cryptoxanthin accumulation.
🛒 How to select fresh orange
Pick up the orange — it should feel heavy for its size. Heavier always means more juice. A lightweight orange will be dry and disappointing inside.
Smooth, firm, tight skin generally indicates a juicier orange with thinner pith. Rough, puffy or very thick skin often means a drier fruit with less juice.
Fresh oranges have a bright, clean citrus scent even through the skin. A fermented or off smell indicates overripeness or poor storage conditions.
🧊 Storage tips & shelf life
Oranges keep well at room temperature because the thick peel protects the fruit. Keep away from direct sunlight and heat sources.
Best for extending shelf life significantly. Store loose with airflow — not in sealed airtight bags, which encourages mould.
Whole oranges don't freeze well. Freeze juice in ice cube trays (convenient for cooking and drinks), or freeze grated zest in small portions. Zest before juicing.
📖 About orange — complete guide
Oranges are one of the world's most cultivated fruits and Australia's most iconic everyday vitamin C source. A single medium orange (131g) provides nearly 60% of the recommended daily vitamin C intake — a nutrient essential not just for immunity, but for collagen production, iron absorption, antioxidant defence and wound healing. Australia's growing regions in the Riverland and Sunraysia produce some of the world's best eating oranges, with an ideal hot-day, cold-night climate that develops outstanding sweetness and acidity balance.
What makes whole oranges particularly valuable compared to orange juice is the combination of fibre with the natural sugars. The dietary fibre in whole orange flesh slows sugar absorption, provides prebiotic fuel for gut bacteria and creates a longer-lasting sense of satiety — dropping the GI from juice's 50–65 down to 40 for whole fruit. The flavonoid hesperidin, found primarily in the white pith that is discarded when juicing, is a potent anti-inflammatory compound shown to reduce blood pressure and arterial stiffness. Eating the whole fruit, including the pith, delivers substantially more nutritional value than even freshly squeezed juice.