Bean Sprouts

Food · Vegetable · Food, Typed Supps

Bean sprouts are crunchy, low-calorie veggies with real vitamin C and vitamin K in them, but they should be cooked, not eaten raw, to stay safe.

Stage by stage

Chewing (Mouth): Chewing breaks the sprouts' thin, water-rich cell walls, releasing their vitamin C, folate, and polyphenols for digestion.
Stomach Breakdown (Stomach): Stomach acid and enzymes break down the small protein and starch content while freeing bound micronutrients.
Nutrient Absorption (Small Intestine): The small intestine absorbs vitamin C, folate, and fat-soluble vitamin K into the bloodstream.
Systemic Use (Bloodstream & Liver): Vitamin K reaches the liver to support blood clotting, while vitamin C and folate are used throughout the body for tissue repair and cell division.

Timing

Bean sprouts are almost always eaten as part of a cooked dish, such as stir-fries, soups, or noodle bowls, and cooking is recommended primarily for food safety rather than to improve nutrient absorption.

Time to effect

Hours: Digestion and absorption of the sprouts' fiber, vitamin C, and folate occur within a few hours of a meal, since sprouts aren't a concentrated single-nutrient source with a cumulative loading effect.

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, Gluten-free.

Satiety

The satiety index is measured on 240 kcal servings. At 23 kcal per 100 g that is 1.1 kg of this, which is not a serving anyone eats — so the index has nothing to say about it.

Environmental footprint

1 kg CO2e and 397 litres of freshwater per kg, matched to "Peas" in Poore & Nemecek (2018), Science 360.

Cost band

Cheap — roughly £2.2 per kg, as a band midpoint rather than a price.

Key nutrients

Vitamin K
Vitamin C
Folate
Copper

Nutrition per 100g

Calories: 22.5
Protein: 3.1g
Carbohydrate: 1.6g
of which sugars: 1g
Fat: 0.1g
of which saturated: 0g
Fibre: 1.3g
Sodium: 1mg

Food vs. supplement

A 100g serving of raw bean sprouts provides roughly 28% DV vitamin K, 15% DV vitamin C, and folate and copper alongside fiber and water for about 30 calories — a nutrient package no single-compound supplement reproduces.

Kitchen tip

Cook bean sprouts (stir-fry, blanch, or boil for a few minutes) rather than eating them raw or lightly cooked; children, older adults, pregnant women, and people with weakened immune systems are advised to avoid raw sprouts of any kind.

Common myth

"Sprouts are just crunchy filler with no real nutritional value." In reality: At about 30 calories per 100g, bean sprouts still supply roughly 28% DV vitamin K and 15% DV vitamin C plus folate and copper, making them nutrient-dense relative to their calorie count, even though they aren't a significant source of protein or iron.