Riboflavin aka B2 is the second of the 8 B vitamins Riboflavin is found naturally in many foods Best sources milk and milk products Great sources enriched flour products, Frontiers Riboflavin in neurological diseases: therapeutic advances, metabolic insights, and emerging genetic strategies Riboflavin (vitamin B2) and oxidative stress: a review British Journal of Nutrition Cambridge Core The effectiveness of compound X is oftentimes dependent on the presence of compounds Y and Z and so on. Endogenous compounds like glutathione get a lot of commercial attention but they do Glutathione redox cycle. In the schematic diagram are represented the Download Scientific Diagram