Most dietary riboflavin is consumed as a complex of food protein with FMN and FAD (Merrill et al., 1981; Nichoalds, 1981). In the stomach, gastric acidification releases most of the coenzyme forms of riboflavin (FAD and FMN) from the protein.
Plasma osmolarity: The osmolarity of blood plasma, which is a measure of the hydration status. The plasma osmolarity is sensitive to changes in hydration status during dehydration and rehydration.The normal plasma osmolarity is in the range of 280-300 mOs/kg.lasma osmolarity: The osmolarity of blood plasma, which is a measure of the hydration status. The plasma osmolarity is sensitive to changes in hydration status during dehydration and rehydration.
The concentration of solutes in the blood stimulates the release of  ADH or antidiuretic hormone. This is referred to as the plasma  osmolarity.