Pharmacognosy intro
Elderberry's PRIMARY active compounds are anthocyanins, cyanidin-3-sambubioside, cyanidin-3-glucoside, and cyanidin-3-sambubioside-5-glucoside, dark purple pigments with antiviral and antioxidant activity, making elderberry one of the richest dietary sources of anthocyanins. Additional compounds include flavonols (quercetin, rutin, isorhamnetin, kaempferol), lectins (Sambucus nigra agglutinins/SNAs critical for antiviral mechanism), phenolic acids (chlorogenic acid, neochlorogenic acid), triterpenes (ursolic acid, oleanolic acid), vitamin C, and cyanogenic glycosides (sambunigrin in raw fruit, requiring cooking to deactivate). The PRIMARY antiviral mechanism is neuraminidase inhibition: cyanidin-3-sambubioside directly binds within the 430-cavity of influenza neuraminidase enzyme, blocking viral release, the SAME mechanism as oseltamivir (Tamiflu). A SECOND independent mechanism involves elderberry flavonoids binding directly to H1N1 virions, preventing host cell entry. A THIRD mechanism operates through SNA lectins competitively inhibiting viral hemagglutinin binding, a molecular decoy strategy. Elderberry increases production of IL-1beta, IL-6, IL-8, TNF-alpha, and IL-10 for coordinated immune response. Anthocyanin ORAC values are among the highest of any fruit.