Wildcrafted and ethically harvested Usnea from the shores of Lake Superior extracted in non gmo vegetable glycerin- coconut derived.
Usnea is a Lichen, which is a symbiotic relationship of Algae and Fungi. This wonderous Lichen has been used medicinally for thousands of years across the globe. With strong antibacterial, antiviral and antifungal properties it's been traditionally used to aid with infections from the throat to the lungs and down to the urinary tract. While it's been shown to have incredible antimicrobial properties, it's been shown not to harm the human microbiome which is a rarity! Usnea supports us through the most minor of colds up to the flu. It's also often used for Candida overgrowth and vaginal yeast infections as well as ringworm. However, I'd say it's most known for clearing toxic heat in the body and wind in the lungs (respiratory infections-pneumonia ect). It does not have any known contraindications. Usneas nickname is Old man's beard and Lungs of the Forest as it only grows in clean, pollution free environments.  
And yes, there is evidence it can be beneficial and helpful against the big C and all its variants. We do a heat extraction for our Usnea tinctures to be able to extract the polysaccharides.