A phytochemical and nutraceutical composition and method for protection against a wide spectrum of viral and bacterial infections, including Covid-19, and for treatment of established infection and infectious inflammation. The composition includes a novel combination of vitamin, mineral, nutraceutical and phytochemical supplements. The composition of supplements and method may be compounded as a pill, tablet, powder, capsule or liquid be taken orally one or more times per day. Vitamin C and vitamin E along with zinc complexed with pyrithione or citrate are used in conjunction with nutraceuticals and phytochemicals provided, respectively, as immune boosters and antiviral agents along with anti-inflammatory nutraceuticals and phytochemicals.