Vitamin B2

itamin B2, known as riboflavin, is a water-soluble vitamin that plays a vital role in energy production, cellular growth, antioxidant protection, and nutrient metabolism. Riboflavin functions primarily through its active coenzyme forms, flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD), which participate in hundreds of oxidation-reduction reactions throughout the body.

One of the primary functions of Vitamin B2 is its involvement in energy metabolism. Riboflavin-containing enzymes help convert carbohydrates, fats, and proteins into usable cellular energy. These reactions occur within mitochondria, the energy-producing structures found in virtually every cell. Through this process, Vitamin B2 helps support normal cellular activity and tissue maintenance.

Riboflavin also contributes significantly to antioxidant defense systems. It is required for the regeneration of glutathione, one of the body’s most important endogenous antioxidants. By helping maintain glutathione activity, Vitamin B2 supports cellular protection against oxidative stress and helps preserve the integrity of proteins, lipids, and DNA.

Vitamin B2 works closely with other B vitamins and assists in the metabolism of Vitamin B6, folate, and niacin. It also participates in red blood cell production and contributes to normal oxygen transport throughout the body. Adequate riboflavin intake supports healthy skin, eyes, nervous system function, and cellular repair mechanisms.

Plant-based sources of riboflavin include almonds, mushrooms, spinach, asparagus, quinoa, fortified plant foods, whole grains, broccoli, and legumes. Consuming a variety of minimally processed plant foods can help support adequate intake while also providing numerous beneficial phytochemicals and minerals.

Low riboflavin intake may contribute to fatigue, cracked lips, mouth inflammation, skin irritation, light sensitivity, and reduced energy metabolism. Because riboflavin participates in numerous enzyme systems, inadequate levels can influence multiple physiological processes.

Vitamin B2 serves as a critical metabolic cofactor that helps cells produce energy efficiently while supporting antioxidant protection and nutrient utilization. Its involvement in mitochondrial function, redox balance, cellular maintenance, and tissue repair makes it an essential component of overall nutritional health. Regular consumption of riboflavin-rich plant foods helps sustain normal metabolic function and supports long-term cellular resilience.

Include a riboflavin source at 1–2 meals: mushroom-spinach sautu00E9 on quinoa; lentil bowls with broccoli rabe; almonds/oats as a snack or breakfast base. Store and serve riboflavin-rich foods away from strong light to limit degradation.

Dietary riboflavin is absorbed in the small intestine and phosphorylated by riboflavin kinase to FMN, then converted by FAD synthetase to FAD. FMN/FAD act as reversible one- or two-electron carriers on the isoalloxazine ring during dehydrogenase and oxidase reactions. Riboflavin is light-sensitive; exposure to strong light can degrade the vitamin in foods.

Identity: PubChem CID 493570 (riboflavin) with formula C17H20N4O6; SMILES/InChI verified. ODS fact sheet confirms riboflavin → FMN/FAD role and water-solubility. NIST lists the same InChI and molecular weight. Literature and ODS detail FAD-dependent glutathione reductase and flavoprotein roles across ETC, β-oxidation, and antioxidant recycling.