In a randomized controlled trial conducted by researchers in Reading, UK, 79 patients with type 2 diabetes were randomized to receive either 1200 mg of hawthorn extract a day or placebo for 16 weeks. Medication for high blood pressure was used by 71% of the patients.
At the end of the 16 weeks, patients taking the hawthorn supplement had a significant reduction in mean diastolic blood pressure (2.6 mm Hg). No herb-drug interactions were reported.
