Several laboratory and animal studies suggest that echinacea contains active substances that boost immune function, relieve pain, reduce inflammation, and have hormonal, antiviral, and antioxidant effects. For this reason, professional herbalists may recommend echinacea to treat urinary tract infections, vaginal yeast (candida) infections, ear infections (also known as otitis media), athlete's foot, sinusitis, hay fever (also called allergic rhinitis), as well as slow-healing wounds. Preliminary studies in the lab suggest echinacea may help inhibit colon tumors when combined with cichoric acid. One study even suggests that echinacea extract exerted an antiviral action on the development of recurrent cold sores triggered by the herpes simplex virus (HSVI) when taken prior to infection.
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