Apples

Overview

Apples provide pectin (prebiotic fiber), quercetin (polyphenol), and demonstrate important food matrix effects where intact structure blunts glycemic response compared to processed forms. Apple juice induces a substantially greater postprandial insulin spike and lower satiety compared to either apple purée or the intact fruit. Preserving natural food structure (e.g., an apple vs. processed forms) blunts post-prandial glycemic excursions. Quercetin is abundant in apples, with the estimated flavonoid intake ranging from 50 to 800 mg/day, with about 75% of dietary polyphenol count being quercetin.

Food Context

Synergies

• Pair with fat for polyphenol absorption; dietary fat enhances absorption of fat-soluble vitamins

Preparation

• Consume whole fruit to preserve food matrix benefits and blunt glycemic response
• Avoid juicing to maintain fiber and glycemic control; apple juice induces substantially greater postprandial insulin spike
• Pectin supports gut microbiome diversity; prebiotic fibres including pectin (apples) support Bifidobacterium, Akkermansia; ↑ butyrate production; improved gut barrier
• Soluble fibre (from apples, oats, flaxseeds) supports gut health and SCFA production

Recipes

no recipes found

Nutrient Tables (per 100 g)

Core nutrients

Nutrient	Amount per 100 g	% RDA per 100 g
Energy	52 kcal	—
Protein	0 g	—
Total fat	0 g	—
Saturated fat	0 g	—
Carbohydrates	14.3 g	—
Fibre	3.2 g	—

Key micronutrients

Nutrient	Amount per 100 g	% RDA per 100 g
Iron	0.2 mg	1.3%
Calcium	0 mg	0%
Potassium	110 mg	3.2%

Reference intakes: US Dietary Reference Intakes for adults (19–50 years; using the higher of male/female values where they differ).

Data provenance (core / micronutrient panel): USDA FoodData Central, APPLES, FDC ID 2058694, API, per 100 g edible portion, last checked 2026-03-14

Substances

Substances in this food: editorial (Overview / literature) plus analytical (nutrition table).

4 substances in this food

Quercetin (and Isoquercetin)

Polyphenol; antioxidant; mitochondrial support; bioavailability improved with vitamin C

Vitamin C (Ascorbate)

Antioxidant; supports iron absorption; neuronal SVCT2 transport

Iron

Oxygen transport; dopamine synthesis (tyrosine hydroxylase cofactor)

Potassium

Electrolyte for nerve transmission, muscle function, and blood pressure regulation

References

• Prebiotic Fibres: Inulin (chicory, onions), GOS (legumes), resistant starch (cooled potatoes, green bananas), pectin (apples)
• Apple juice induces a substantially greater postprandial insulin spike and lower satiety compared to either apple purée or the intact fruit
• Preserving natural food structure (e.g., an apple vs. processed forms) blunts post-prandial glycemic excursions
• Quercetin is abundant in capers, apples, onions, berries, kale and soybeans
• Soluble fibre (from apples, oats, flaxseeds) supports gut health and SCFA production
• Prebiotic fibres including pectin (apples) support Bifidobacterium, Akkermansia; ↑ butyrate production; improved gut barrier