Effect of Nitrate Supplementation on Blood Pressure and Microvascular Function of Resistant Hypertensive Patients

This study is testing whether nitrate supplements (like those found in beetroot juice) can help lower blood pressure and improve blood vessel function in people with resistant hypertension — high blood pressure that does not respond well to three or more medications. **You may be eligible if...** - You have resistant hypertension (high blood pressure that has not responded to multiple medications) - Your medications have not been changed or increased in the last 30 days **You may NOT be eligible if...** - You have been diagnosed with cancer - You have heart failure - You are already taking any nitrate-containing medications - You have undergone a renal denervation procedure (a nerve-blocking treatment for blood pressure) Talk to your doctor to see if this trial is right for you.