Wheatgrass: We know its good for you; we know it tastes like..well..grass; and we know that it can be bought in capsule form, powder form, or in its natural form to juice or blend with smoothies. But here's the kicker - what is it, really? We hear other terms like "gluten" , "high glycemic" and know on a basic level that we should "stay away from those foods", but many may not have a clue what these terms actually are.