Red Wine
Red wine is high in antioxidants and has been related to a wide range of health benefits. Interestingly, drinking red wine has been related to increased levels of nitric oxide in several studies.
Treatment of cells with red wine raised the levels of nitric oxide synthase, an enzyme involved in the synthesis of nitric oxide, according to one test-tube research. Another test-tube study found that specific compounds found in red wine stimulated nitric oxide synthase and nitric oxide release from the cells that line blood vessels. As a result, it's no surprise that moderate red wine drinking has been demonstrated to lower blood pressure and improve heart health. One of the reasons is that red wine boosts the activity of the enzyme nitric oxide synthase.