Orange

Food · Fruit · Food, Typed Supps

A genuinely good vitamin C source, with fibre a pill does not give you.

Stage by stage

Intake (Chewing releases juice): Chewing breaks down the fruit’s structure, releasing vitamin C and sugars.
Stomach (Fast-moving, water-soluble): Being water-soluble, its vitamin C moves through digestion quickly.
Small intestine (SVCT1 transporter): A dedicated transporter absorbs vitamin C, alongside fibre that slows sugar absorption.
Bloodstream (Collagen & immune support): Vitamin C supports collagen production and immune cell function once absorbed.

Timing

Whole fruit (versus juice) keeps the fibre that slows sugar absorption.

Time to effect

Hours: Vitamin C blood levels rise within a couple of hours.

Allergens

None of the fourteen major allergens. Derived from what this food is, not from a product label.

Eating patterns

Fits: Vegan, Vegetarian, Pescatarian, Halal, Kosher, Low-FODMAP, Gluten-free. Depends on the product: Keto.

In season

November to April in the northern hemisphere, May to October in the southern.

Satiety

202 on the satiety index, where white bread is 100 — very high. Measured by Holt et al. (1995).

Environmental footprint

0.4 kg CO2e and 83 litres of freshwater per kg, matched to "Citrus fruit" in Poore & Nemecek (2018), Science 360.

Cost band

Cheap — roughly £2 per kg, as a band midpoint rather than a price.

Key nutrients

Nutrition per 100g

Calories: 41.8
Protein: 1g
Carbohydrate: 8.2g
of which sugars: 8.2g
Fat: 0g
of which saturated: 0g
Fibre: 2.4g
Sodium: 0mg

Food vs. supplement

One medium orange has about 70mg of vitamin C — comparable to a low-dose supplement — plus fibre, potassium, and plant compounds a pill doesn’t include. A supplement delivers a bigger, more precise dose; the orange delivers a smaller amount wrapped in everything else the fruit contains.

Kitchen tip

Eat it whole rather than juicing it to keep the fibre that slows down sugar absorption.

Common myth

“Orange juice is nutritionally the same as the whole fruit.” In reality: Juicing removes most of the fibre, meaning the same sugar hits your bloodstream faster with less to slow it down.

Recipes that use it

Feijoada