whole cola nuts, kola nut, african fruit, bitter kola, nigerian traditional food, closeup, , hand drawn

acuminata africa african aquarelle background bean bitter brown caffeine catechin closeup cocoa cola edible epicatechin food fruit health healthy illustration ingredient inside isolated kola macro natural nigerian nut object open organic painted pink plant procyanidin raw seed seeds snack stimulants studio theobromine tradition vegan vegetarian watercolor watercolour white whole