References: The dietary flavonoids apigenin and -LRB--)- epigallocatechin gallate enhance the positive modulation by diazepam of the activation by GABA of recombinant GABAa receptors (Campbell EL, Chebib M and Johnston GAR, Biochemical Pharmacology, 2004, 68, 1631 - 1638) Modulation of ionotropic GABA receptors by natural products of plant origin (GAR Johnston, JR Hanrahan, M Chebib, RK Duke and KN Mewett, Advances in Pharmacology, 2006, 54, 285 - 316) Full text of these references (cmbn.no)
Parsley also contains a super nutrient called apigenin which can aid in regulating the immune system. (parsleyhealth.com)
Parsley is rich in flavone apigenin that has the effect of lowering estrogen levels. (fitnessandpower.com)