Vitamin C (Buffered) + Citrus Bioflavonoids, 750mg - 100 tablets. Vitamin C (Buffered) + Citrus Bioflavonoids, 750mg - 100 tablets Other Ingredients Jarrow Formulas. Vitamin C is a basic antioxidant that is needed for normal blood clotting and is essential in the synthesis of collagen, necessary for healthy connective tissue, gums, teeth and bones.