What it is
E161b is lutein, a yellow carotenoid pigment extracted from marigold flowers (Tagetes erecta) or, less commonly, from spinach and other green vegetables.
Why it matters
Used as a yellow food colourant in fats, oils, and some baked goods. Also widely used in eye-health supplements (where the source is the same — marigold extract).
What to do
Always vegan.