Frontiers Organic formulation modulating crop health, yield and managing anthracnose twister and Stemphylium blight of onion Onions contain vitamin C and B 6 which are important for the production of glutathione, a sulphur containing protein that acts as an antioxidant for the lens of the eye. Raising glutathione levels Alliinase, a vital enzyme for onion pungency ACI PLC The effect of dietary onion and garlic on hepatic lipid concentrations and activity of antioxidative enzymes in chicks