[Supplement] 1 Star Red Raspberry Refer to label instructions [Why] 
Red raspberry leaves contain astringent tannins that are helpful for soothing sore throats. Red raspberry , blackberry, and blueberry leaves contain astringent tannins that are helpful for soothing sore throats.66 Sage tea may be gargled to soothe a sore throat. All of these remedies are used traditionally, but they are currently not supported by modern research.