Heavy-duty 220 or 240-volt outlets: $300 or more for an outlet running off of a nearby outlet; $600 or more to upgrade the existing panel, which includes adding a 220 to 240 volt circuit, running the conduit, and installing a new receptacle.
Riboflavin is a B vitamin. It can be found in certain foods such as milk, meat, eggs, nuts, enriched flour, and green vegetables. Riboflavin is frequently used in combination with other B vitamins in vitamin B complex products.
Updated April 20, 2016. Riboflavin, or vitamin B-2, is a member of the water-soluble family of B-Complex vitamins. It's required for glucose metabolism so your body can produce energy from carbohydrates. It' also needed for healthy red blood cell production and general body growth.