The effect of a standard diet versus a Mediterranean diet, supplemented with EVOO and pistachios, on GDM incidence was compared (a total of 874 women completed the study). Results showed that an early dietary intervention in pregnant women with a Mediterranean diet supplemented with EVOO and pistachios reduced the incidence of GDM. The study concluded that this recommendation may be an important implication on the long-term health of the mother and the child.
Assaf-Balut, C., de la Torre, N. G., Durán, A., Fuentes, M., Bordiú, E., del Valle, L., … & Izquierdo, N. (2017). A Mediterranean diet with additional extra virgin olive oil and pistachios reduces the incidence of gestational diabetes mellitus (GDM): A randomized controlled trial: The St. Carlos GDM prevention study. PloS one, 12(10), e0185873.