Essential-C & flavonoids offers a blend of ChelaMax® vitamin C and flavonoid compounds to provide vitamin C support for healthy immune and cellular function as well as blood vessel integrity. ChelaMax® offers scientifically-formulated, rigorously tested, and fully-chelated calcium ascorbate. The process of chelation wraps this non-acidic water-soluble nutrient in a protective shell to enhance bioavailability. The bioflavonoids quercetin, and rutin are powerful free radical scavengers that complement the roles of vitamin C.