Spinach

Spinach is a leafy green vegetable that gives smoothies and juices a mild, fresh flavor. It is high in vitamins, minerals, and antioxidants, making it a true nutritional powerhouse.

It's packed with antioxidants like quercetin, kaempferol, and lutein, as well as vitamins A and C. Spinach also contains nitrates, which are good for your heart. A study of 27 people found that consuming spinach for seven days decreased systolic and diastolic blood pressure considerably. Heart disease is caused by high blood pressure, which is a key risk factor. Furthermore, some study shows that spinach juice contains antacid activity, making it a good choice for people who suffer from acid reflux.