δ-Carotene or ε,ψ-carotene is a form of carotene with an ε-ring at one end, and the other uncyclized. It is an intermediate synthesis product in some photosynthetic plants between lycopene and α-carotene (β,ε-carotene) or ε-carotene (ε,ε-carotene). δ-Carotene is fat soluble.