Kiwi

Food · Fruit · Food, Typed Supps

More vitamin C than an orange, plus a genuine digestive enzyme.

Stage by stage

Intake (Soft flesh): Soft flesh (edible skin optional) requires little chewing.
Stomach (Actinidin begins working): An enzyme unique to kiwi, actinidin, begins helping digest proteins already in the stomach.
Small intestine (Vitamin C & fibre absorbed): Vitamin C and fibre are absorbed.
Digestive & immune tissue (Protein digestion & immune support): Actinidin supports protein digestion; vitamin C supports immune function.

Timing

Eating the skin, if tolerated, adds extra fibre.

Time to effect

Hours: Vitamin C blood levels rise within a couple of hours; digestive enzyme effects are immediate.

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 March in the northern hemisphere, May to September in the southern.

Satiety

189 on the satiety index, where white bread is 100 — high. Modelled from the Holt et al. (1995) measurements.

Environmental footprint

1.1 kg CO2e and 199 litres of freshwater per kg, matched to "Other fruit" in Poore & Nemecek (2018), Science 360.

Cost band

Cheap — roughly £3 per kg, as a band midpoint rather than a price.

Key nutrients

Vitamin C
Actinidin (digestive enzyme)
Fiber

Nutrition per 100g

Calories: 55
Protein: 1.2g
Carbohydrate: 9.1g
of which sugars: 8.8g
Fat: 0.7g
of which saturated: 0.2g
Fibre: 3g
Sodium: 2mg

Food vs. supplement

One kiwi provides more vitamin C than a medium orange, and its actinidin enzyme is genuinely studied for helping digest protein — a distinct mechanism no vitamin C supplement provides.

Kitchen tip

The skin is edible and adds extra fibre - a quick rinse and scrub is all it needs if the fuzz does not bother you.

Common myth

“Kiwi is mainly valuable for its exotic appeal, not real nutrition.” In reality: Gram for gram, it’s one of the more nutrient-dense common fruits, with more vitamin C than most citrus.