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“The steroidal aromatase inhibitor (positive control) 4-hydroxyandrostenedione had an IC(50) of 20 nM. The inhibition by apigenin and naringenin coincided with some degree of cytotoxicity at 100 microM. The natural flavonoid derivative rotenone (IC(50) 0.3 microM) was the most potent aromatase inhibitor tested.”
Toxicological sciences : an official journal of the Society of Toxicology • 2004 | View Paper
“At a dose of 10 μM apigenin , luteolin, naringenin , hesperidin, quercetin and kaempferol induced significant reductions, and at 1 μM only naringenin, hesperidin and quercetin were effective.”
“Their innocuousness appeared to be related to glycosylation, because the corresponding aglycones naringenin , eriodictyol, hesperetin, apigenin, kaempferol) were all inhibitory, in particular apigenin (80% inhibition at 100 μM).”