Qi, as I understand it, is a term in Chinese culture that refers to the life force or natural energy that flows in living things and, perhaps, the entire universe. Many Americans know about it through Chinese traditional medicine or martial arts. If you are a fan of such practices, you will be glad to learn that the Food and Drug Administration (FDA) has recently announced that it has no plans to regulate items which claim to increase, improve, or enhance the flow of qi as medical devices.
Well, that is a relief to many, I suppose.