Brassica oleracea Identity & Plant Part
The botanical entity is Brassica oleracea L., the species that gives cabbage, broccoli, cauliflower, kohlrabi and kale. Kale is the leafy, non-heading group of that species, grown for its curled or flat leaves. The part used is the leaf. Stems, flower buds, seed and roots are not part of this ingredient.
The species name alone does not identify the ingredient, because the same binomial covers many unrelated vegetables with different parts and composition. The leaf carries glucosinolates, characteristic of the cabbage family, together with chlorophylls, carotenoids and flavonoid glycosides such as kaempferol and quercetin derivatives. Kale is also distinct from mustard greens and collards in the trade, although collards are the same species.
Kale is also sold as a cut or flaked dried leaf. That material is a coarse vegetable cut with the full fiber of the leaf, so it wets and settles differently from a dispersible extract in the same blend.












