Vitamin C with Bioflavonoids by Vital Nutrients is a high quality health supplement which combines 2 of the most powerful synergistic nutrients which can enhance immune functions and antioxidant activity. This health supplement is formulated to help with circulation support. vein health support. immune system support. and capillaries support. This health supplement is formulated with a 60% citrus bioflavonoid complex. and is designed to be gentle on the stomach.