The economy of citrus oils in general is clearly depicted by the study of Bergamot Oil production. Only the expressed oil from the peels of the fruits from the small bergamot tree, Citrus Bergamia, are of any substantial interest. The pulp or juice is of little value beyond what can be converted into citric acid. The leaves and twigs may be distilled to yield a BergamotPetitgrain Oil ,<…..>but the fruits are not edible.
Arctander, Steffen . Perfume and Flavor Materials of Natural Origin (p. 110).