Vitamin B2 (Riboflavin) plays an essential role in all oxidative processes and is important for the production of energy and helps support the repair and maintenance of soft tissue. Riboflavin is involved in the manufacture of red blood cell and antibody formation. It also supports carbohydrate-fat-protein metabolism. Riboflavin deficiency leads to decreased energy production, especially in cells that need to replicate quickly, for example, mucous membranes and skin. The production of thyroid hormone also relies on the presence of Riboflavin. Good sources of Riboflavin include almonds, whole grains, mushrooms, green leafy vegetables and soybeans. B2 (Riboflavin) is a water soluble nutrient and often gives urine a yellow-green fluorescent glow, this is quite normal.