Not kosher
Description: Anthocyanins (food colouring)
Function: food colouring
Rationale:
Confirmed via OU Kosher's color-additives article: anthocyanins/grape-skin extract are commonly sourced from non-kosher winery byproducts, raising Stam Yeinom concerns and requiring reliable kosher certification.
If you don't see a status above, it does not mean the additive is not kosher automatically - it might just not be documented in our database yet.