Barley is a type of grain that’s considered the fourth most important cereal crop around the globe. Also known as barley leaves and barley greens, barley grass is the leaf of the barley plant. It has been studied extensively for its beneficial health effects and is often featured in green juices and supplements.

Although fresh barley grass can be tricky to find, it’s available in other forms, including powders, juices, tablets, and gummies. It’s often combined with other ingredients in green blends, including kale, spirulina, and wheatgrass.