Tapioca

Food · Grain · Food, Typed Supps

Almost pure starch from a root vegetable. It is there for texture and energy, not nutrition.

Stage by stage

Intake (Little oral breakdown): Chewy cooked pearls are largely swallowed whole, so salivary amylase contributes little.
Stomach (Rapid emptying): With no fibre, fat or protein present, there is nothing to delay gastric emptying.
Small intestine (Fast starch hydrolysis): Branched amylopectin starch is hydrolysed quickly and absorbed as glucose.
Bloodstream (Sharp glucose rise): Glucose enters the blood rapidly and is used or stored; no micronutrients accompany it.

Time to effect

Under an hour: Blood glucose rises within roughly 20 to 40 minutes of eating.

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

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

Environmental footprint

1.3 kg CO2e and 0 litres of freshwater per kg, matched to "Cassava" in Poore & Nemecek (2018), Science 360.

Cost band

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

Key nutrients

Starch (amylopectin)
Carbohydrate energy

Nutrition per 100g

Calories: 325
Protein: 0.2g
Carbohydrate: 79.3g
of which sugars: 0g
Fat: 0.2g
of which saturated: 0.1g
Fibre: 0g
Sodium: 1mg

Food vs. supplement

There is no supplement version and no reason for one. Tapioca is a texture and energy ingredient; if the goal is a gluten-free staple that also feeds you, buckwheat, quinoa or brown rice do the same job while bringing fibre, protein and minerals along.

Kitchen tip

Boil pearls in plenty of water, then rest them off the heat before draining — the residual heat finishes the centre without turning the outside to paste. Cooked pearls harden within hours as their starch retrogrades, so they are best made shortly before serving rather than kept.

Common myth

“Tapioca is a wholesome, natural alternative to wheat.” In reality: It is a natural product and a genuine wheat alternative for anyone avoiding gluten, but it is not wholesome in the sense implied. Extraction removes the fibre, protein and minerals of the cassava root and leaves a starch that is nutritionally close to cornflour.