Hydrangeic acid is being investigated as a possible antidiabetic drug as it significantly lowered blood glucose, triglyceride and free fatty acid levels in laboratory animals.[1]
See also
Lunularic acid, the corresponding dihydrostilbenoid also found in H. macrophylla
References
^ abHydrangeic acid from the processed leaves of Hydrangea macrophylla var. thunbergii as a new type of anti-diabetic compound. Hailong Zhang, Hisashi Matsuda, Chihiro Yamashita, Seikou Nakamura and Masayuki Yoshikawa, European Journal of Pharmacology, Volume 606, Issues 1–3, 15 March 2009, Pages 255–261, doi:10.1016/j.ejphar.2009.01.005