e200921c_sity_of_Michigan_Health_System__Why
[Supplement] 1 Star Usnea Refer to label instructions [Why] 
Usnea has a traditional reputation as an antiseptic and is sometimes used for people with common colds. Elderberry has shown antiviral activity and thus may be useful for some people with common colds. Elder flowers are a traditional diaphoretic remedy for helping to break fevers and promote sweating during a cold. Horseradish has antibiotic properties, which may account for its usefulness in easing throat and upper respiratory tract infections. The resin of the herb myrrh has been shown to kill various microbes and to stimulate macrophages (a type of white blood cell).71 Usnea has a traditional reputation as an antiseptic and is sometimes used for people with common colds.72
Common Cold/Sore Throat (Holistic) | University of Michigan Health System
Why