Supports Immune Function. Caffeine Free. Non-GMO Project Verified. USDA Organic. Kosher. Vegan. Yogi Echinacea Immune Support tea blends Echinacea, widely used by herbalists to support immune function, with Black Elderberry Extract and Mullein, herbs traditionally used to support respiratory function. With flavorful Peppermint, Lemongrass, and Licorice, Yogi Echinacea Immune Support tea is a delicious way to support your immune system any time of the year.