How Does Fasting Affect Blood Pressure? At WaterFastingNews, we help people who love fasting by collating information and news about not eating and pattern eating. Fasting and blood pressure are two related topics. In this article, we’ll discuss the benefits of intermittent fasting, the dietary changes it promotes, and how exercise can lower blood pressure. In addition, we’ll discuss the ways that fasting and exercise help us lose weight and reduce insulin levels.