Barley grass juice is a powder or liquid pressed from young barley leaves. It differs from the mature grain. The drink supplies chlorophyll, vitamins, minerals, and antioxidants.
Mix a serving with water or juice in the morning on an empty stomach. Some people notice mild digestive upset, especially when starting out. Sensitive stomachs may need a smaller dose at first.
Manufacturers often promote it for immune defense and daily energy. The bright green powder dissolves best in cool liquids. Keep the container sealed and dry after opening.