<unk> is an American brand of dietary supplement containing herbal extracts, amino acids, antioxidants, electrolytes, vitamins, and other ingredients originally marketed as preventing the common cold and improving immune function. The benefits of its use are unsupported by robust clinical research. There are no studies supporting<unk> s effectiveness that meet scientific standards. The former owners were fined by the Federal Trade Commission for deceptive advertising and were the subject of successful class actions. It was created by schoolteacher Victoria Knight-McDowell in the early 1990s. The website does not list any side effects that one might experience after taking<unk>  aside from "some sensitivity to any of the vitamins or herbal extracts". It is offered for sale over-the-counter in many U.S. retail stores in multiple forms: effervescent tablet, gummy, chewable tablet, lozenge, tablet, or powder.
Airborne 
Dental aerosol
Injection 
Deep clean 
Inhalation
Respiratory droplet
Bolus 
Cathartic