Rice Milk

Food · Drink · Food, Typed Supps

The thinnest of the plant milks, and the one with an age restriction.

Stage by stage

Hydrolysed starch (The carton): Rice starch broken into sugars gives the sweetness without anything being added.
Fast carbohydrate (Circulation): Nine grams per 100 g, absorbed quickly, with almost no protein or fat to slow it.
Calcium gap (Skeleton): Two milligrams per 100 g unfortified, against roughly 120 in dairy milk.
Inorganic arsenic (Systemic): Rice concentrates it from paddy soil — the basis for the under-five advice.

Timing

Nothing acute. The consideration is cumulative and applies to children, whose intake per kilogram of body weight is several times an adult’s.

Time to effect

15–30 min: Glycaemic peak — the highest of the plant milks.
Years: Inorganic arsenic exposure is chronic, which is why the guidance targets small children.

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, Gluten-free. Depends on the product: Keto.

Satiety

Not scored: the satiety index is measured on 240 kcal servings, and nobody eats a 240 kcal serving of this. The question does not apply rather than the answer being unknown.

Environmental footprint

1.2 kg CO2e and 270 litres of freshwater per kg, matched to "Rice milk" in Poore & Nemecek (2018), Science 360.

Cost band

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

Key nutrients

Carbohydrate

Nutrition per 100g

Calories: 47
Protein: 0.6g
Carbohydrate: 9g
of which sugars: 3.1g
Fat: 1g
of which saturated: 0.2g
Sodium: 65mg

Food vs. supplement

Rice beverage is the only common milk substitute with a formal age restriction attached to it, and that restriction comes from a contaminant rather than from a nutrient. It is a useful reminder that "plant-based" is a description of origin and not a safety claim.

Kitchen tip

For an adult it is fine and unremarkable. For a child under five it should not be the main milk, and that is formal advice rather than caution.

Common myth

“Rice milk is the safe choice for allergy-prone kids.” In reality: It is the safe choice on allergens — no dairy, soy, nut or gluten protein — and that is a real advantage. But it is the weakest of the plant milks nutritionally, and the UK Food Standards Agency specifically advises against rice drinks as a main milk for children under five because of inorganic arsenic. For a child avoiding everything else, this needs a fortified product and dietetic input, not a default swap.

In the glossary

Absorption