Hawthorn Lowers Diastolic Blood Pressure in Diabetics

Byron's Comments:

Type II diabetics need all the help they can get with natural blood pressure support.

Study Title:

Hypotensive effects of hawthorn for patients with diabetes taking prescription drugs: a randomised controlled trial.

Study Abstract:

BACKGROUND: Hawthorn (Crataegus laevigata) leaves, flowers and berries are used by herbal practitioners in the UK to treat hypertension in conjunction with prescribed drugs. Small-scale human studies support this approach. AIM: To investigate the effects of hawthorn for hypertension in patients with type 2 diabetes taking prescribed drugs. DESIGN OF STUDY: Randomised controlled trial. SETTING: General practices in Reading, UK. METHOD: Patients with type 2 diabetes (n = 79) were randomised to daily 1200 mg hawthorn extract (n = 39) or placebo (n = 40) for 16 weeks. At baseline and outcome a wellbeing questionnaire was completed and blood pressure and fasting blood samples taken. A food frequency questionnaire estimated nutrient intake. RESULTS: Hypotensive drugs were used by 71% of the study population with a mean intake of 4.4 hypoglycaemic and/or hypotensive drugs. Fat intake was lower and sugar intake higher than recommendations, and low micronutrient intake was prevalent. There was a significant group difference in mean diastolic blood pressure reductions (P = 0.035): the hawthorn group showed greater reductions (baseline: 85.6 mmHg, 95% confidence interval [CI] = 83.3 to 87.8; outcome: 83.0 mmHg, 95% CI = 80.5 to 85.7) than the placebo group (baseline: 84.5 mmHg, 95% CI = 82 to 87; outcome: 85.0 mmHg, 95% CI = 82.2 to 87.8). There was no group difference in systolic blood pressure reduction from baseline (3.6 and 0.8 mmHg for hawthorn and placebo groups, respectively; P = 0.329). Although mean fat intake met current recommendations, mean sugar intake was higher and there were indications of potential multiple micronutrient deficiencies. No herb-drug interaction was found and minor health complaints were reduced from baseline in both groups. CONCLUSIONS: This is the first randomised controlled trial to demonstrate a hypotensive effect of hawthorn in patients with diabetes taking medication.

Study Information:

Walker AF, Marakis G, Simpson E, Hope JL, Robinson PA, Hassanein M, Simpson HC. Hypotensive effects of hawthorn for patients with diabetes taking prescription drugs: a randomised controlled trial. Br J Gen Pract. 2006 June 56(527):437-43.
Hugh Sinclair Unit of Human Nutrition, School of Food Biosciences, The University of Reading, Reading.

Full Study:

http://www.ingentaconnect.com/content/rcgp/bjgp/2006/00000056/00000527/art00008?token=0056188ca6d8eee67b76504c48766c707049442f2a