Wheatgrass is a kind of grass. The above-ground parts, roots, and rhizome are used to make supplements. Wheatgrass is often used as a source of nutrients. It contains vitamin A, vitamin C, vitamin E, iron, calcium, magnesium, and amino acids.

People use wheatgrass for conditions such as a blood disorder that reduces levels of protein in the blood called hemoglobin (beta-thalassemia), high cholesterol, a type of inflammatory bowel disease (ulcerative colitis), and many others.

Wheatgrass juice is a popular health drink. It is thought to benefit health only when fresh and taken on an empty stomach immediately after being mixed.

In foods and beverages, wheatgrass extracts are used as a flavoring component.