NuMedica C-Bioflav 1000 is one of the best supplements to help boost immune system functions. This formula's combination of vitamin C and bioflavonoids provides a powerful aid for your body's natural defense against illness and infection. As NuMedica supplements provide support for physiological balance, C-Bioflav 1000 provides support for healthy collagen production and functions as connective tissue supplements. Recommended Use: Take 2 capsules per day or as directed by your healthcare practitioner. NuMedica C-Bioflav 1000 Facts: 2 capsules contain: Vitamin C (as ascorbic acid) 1,000 mg Citrus Bioflavonoid Complex [standardized to 50% (250 mg) bioflavonoids: hesperidin and other naturally occurring compounds] 500 mg Other Ingredients: Hydroxypropyl methylcellulose (vegetable capsule), bamboo silica.