Riboflavin
See Vitamin B2

Rutin
Rutin is a natural bioflavonoid (saphora japonica) which acts synergistically with Vitamin C to help maintain a healthy immune system. Bioflavonoids such as quecertin, rutin and hesperidin are vital in their ability to increase the strength of the capillaries and to regulate their permeability. They assist vitamin C in keeping collagen, the intercellular cement. In healthy condition, are essential for the proper absorption and use of vitamin C, prevents vitamin C from being destroyed in the body by oxidation, beneficial in hypertension, helps hemorrhages and ruptures in the capillaries and connective tissues and builds a protective barrier against infections.