Riboflavin, also called vitamin B2. Riboflavin, is a water soluble vitamin present in most animal and plant tissues. Riboflavin is one of the essential b vitamins, known to help support adrenal function, help calm and maintain a healthy nervous system, and facilitate key metabolic processes, including helping to turn food into energy. We ship most of the orders within the Handling Time specified. However, please make a note that we do not ship on Saturdays and Sundays. We will always keep your informed if we anticipate any kind of delay in your order. VitaGen is NOT responsible for any and all packages detained/impounded/or returned to us by the country’s respective Customs Department. It is the FULL responsibility of the customer to ensure that these vitamins and supplements are allowed b.