After a stroke a cardiologist put me on BP med. My legs and feet swelled. Stopped med. Started drinking 4-5 cups of Haw Berry tea 3 weeks ago. After 3 days my BP started to slowly lower. Today was follow up with doc, BP 120/80. Have read Hawthorne Berries help body produce Nitric Oxide, which relaxes blood vessels. I need 8-10 cups of water each day--half will now be this tea. It is a mild pleasant flavor. It has NO Caffine! Sometimes I punch it up with cinnamon bark essential oil. Yummm. Two months Before stroke my BP measured 124/80 at doc office. I am back to what is normal for me. I just order 3 more bags.