Quinoa

Food · Grain · Food, Typed Supps

A rare plant food that is genuinely a complete protein.

Stage by stage

Intake (Saponins rinsed away): Rinsing before cooking removes bitter-tasting saponins on the outer layer.
Stomach (Protein & starch digestion): Cooking softens its structure; protein and starch digestion begins.
Small intestine (Complete amino acid absorption): All nine essential amino acids are absorbed — unusual for a plant source, most of which are missing at least one.
Muscle & blood cells (Protein synthesis & iron use): Absorbed amino acids support protein synthesis; absorbed non-heme iron supports red blood cell production.

Timing

Rinse before cooking to remove bitter saponins.

Time to effect

Weeks: Regular intake contributes to protein and iron status.

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.

Satiety

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

Environmental footprint

1.6 kg CO2e and 648 litres of freshwater per kg, matched to "Wheat & rye" in Poore & Nemecek (2018), Science 360.

Cost band

Mid — roughly £7 per kg, as a band midpoint rather than a price.

Key nutrients

Complete plant protein
Non-heme iron
Fiber
Magnesium

Nutrition per 100g

Calories: 103.3
Protein: 3.6g
Carbohydrate: 16.3g
of which sugars: 1.3g
Fat: 1.8g
of which saturated: 0.2g
Fibre: 3.4g
Sodium: 4mg

Food vs. supplement

Quinoa is one of the few plant foods providing a genuinely complete amino acid profile on its own — most plant proteins need combining with another source (like rice with beans) to match what a whey or pea protein blend already provides.

Kitchen tip

Rinse it under running water before cooking to wash off the bitter natural coating left on the outside.

Common myth

“Quinoa is a grain.” In reality: It’s technically a seed from a plant related to spinach and beets, not a true cereal grain — though it’s cooked and used like one.