Halal Additive Checker
E407

Carrageenan

Is it halal?

That depends on the source used, which is why this page states the source rather than a verdict:

Plant, mineral or synthetic

Plant-based, mineral or synthetic in every commercial form, so no animal-source question arises.

From red seaweed.

Found in
Dairy, plant milks, desserts

Others from the same source

This page describes what additives are made from. It does not issue rulings. Where a source varies by manufacturer, the only reliable answer for a specific product is its halal certification or the manufacturer’s own statement — and where the schools of law differ, the position of the school you follow is the one that answers your question.