Wheatgrass has many benefits, the Hippocrates Institute reports, ranging from lowering your blood pressure to restoring your gray hair to its natural hue. It is also a treatment for sagging skin, both Hippocrates and Dogwood Gardens Organic Farms say. While the Mayo Clinic gives wheatgrass a nod for its nutritional value, the clinic also warns that no significant research backs up other claims that surround wheatgrass. Wheatgrass also has a few warnings. Consult with your doctor before including wheatgrass in your diet.