Zucchini

Food · Vegetable · Food, Typed Supps

Mild and mostly water, but a real source of potassium and gut-friendly fibre.

Stage by stage

Intake (Chewing): Its tender flesh breaks down easily with chewing.
Stomach (Fast digestion): Digestion begins quickly since it is mostly water and soft fibre.
Small intestine (Fiber & potassium absorbed): Fiber and potassium are absorbed, with minimal effect on blood sugar.
Gut (Bulk & regularity): Its water and fibre content add bulk that supports regular digestion.

Timing

Holds its texture better when sauteed or roasted quickly at high heat rather than boiled, which makes it watery.

Time to effect

Same meal: Its fibre and water content add bulk that can help with fullness during the meal itself.

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, Keto, Low-FODMAP, Gluten-free.

In season

June to September in the northern hemisphere, December to March in the southern.

Satiety

The satiety index is measured on 240 kcal servings. At 17 kcal per 100 g that is 1.5 kg of this, which is not a serving anyone eats — so the index has nothing to say about it.

Environmental footprint

0.5 kg CO2e and 108 litres of freshwater per kg, matched to "Other vegetables" in Poore & Nemecek (2018), Science 360.

Cost band

Cheap — roughly £2.5 per kg, as a band midpoint rather than a price.

Key nutrients

Nutrition per 100g

Calories: 16.5
Protein: 1g
Carbohydrate: 2.2g
of which sugars: 2.2g
Fat: 0.2g
of which saturated: 0g
Fibre: 1g
Sodium: 0mg

Food vs. supplement

Zucchini will not replace a concentrated potassium or fibre supplement dose, but its very low calorie density makes it an easy way to add bulk and fibre to a meal without much added sugar or starch.

Kitchen tip

Salting sliced zucchini and letting it sit for 10 minutes draws out excess water, which helps it roast or saute instead of turning soggy.

Common myth

Zucchini has basically no nutrients since it is mostly water. In reality: Its high water content does mean lower nutrient density per gram, but it still provides real potassium, vitamin C, and fibre, especially when the skin is left on.