Immune Support Brew contains Elderberry Flowers, Echinacea Flowers, and Calendula Flowers which are a power-packed combination of immune tonics and lymphatic-loving herbals works to shift an active flu and support an overburdened immune system. Brew strongly, and be sure to sip frequently to alleviate symptoms. Also,  demulcent actions of Mullein in this blend work together to combat a hoarse, sore throat and soothe relentless coughs, supporting the lungs and gently sedating any upper respiratory irritation or spasms.