GNC brand) (frequently<unk>  acetate or<unk>  gluconate lozenges) are a group of dietary supplements that are<unk> ly used for the treatment of the . The use of<unk>  supplements at doses in excess of 75 mg/day within 24 hours of the onset of symptoms has been shown to reduce the duration of cold symptoms by about 1 day in adults. Adverse effects with<unk>  supplements by mouth include bad taste and nausea. The intranasal use of<unk> -containing nasal sprays has been associated with the loss of the sense of smell; consequently, in June 2009, the United States Food and Drug Administration (USFDA) warned consumers to stop using intranasal<unk> . The human rhinovirus – the most<unk>  viral pathogen in humans – is the predominant cause of the<unk>  cold. The hypothesized mechanism of action by which<unk>  reduces the severity and/or duration of cold symptoms is the suppression of nasal inflammation and the direct inhibition of rhinoviral receptor binding and rhinoviral replication in the nasal mucosa.
Zinc and the common cold
Vitamin C and the common cold
Vitamin D and respiratory tract infections
Lewis lead
MMR vaccine and autism
Breastfeeding and HIV
Alcohol and cancer
Alcohol and cardiovascular disease