Is it ultra-processed?
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Calcium citrates (E333)

No. Calcium citrates (E333) is not one of the markers Open Food Facts uses to classify a food as processed or ultra-processed, so on its own it doesn't raise a product's NOVA group.

What it is

Sequestrants are substances which form chemical complexes with metallic ions.

A product that contains it can still be ultra-processed for other reasons: 59 of the 59 products here that contain calcium citrates (E333) (100%) are in group 4 because of other ingredients or additives.

Function

Sequestrant
Sequestrants are substances which form chemical complexes with metallic ions.
Stabiliser
Stabilisers are substances which make it possible to maintain the physico-chemical state of a foodstuff; stabilisers include substances which enable the maintenance of a homogenous dispersion of two or more immiscible substances in a foodstuff, substances which stabilise, retain or intensify an existing colour of a foodstuff and substances which increase the binding capacity of the food, including the formation of cross-links between proteins enabling the binding of food pieces into re-constituted food.

Functional class definitions from the EU food additives regulation, via Open Food Facts.

More about calcium citrates (E333) on Wikidata

Where it turns up

Calcium citrates (E333) appears in 59 of the 40,000 products on this site (0%).

Products containing calcium citrates (E333)

How the NOVA classification works