Friday, March 26, 2010

Vitamin G (B2)

Vitamin G is what they used to call Riboflavin/B2 in the old days (I’m guessing because the discoverer’s name was Gyorgi). More on B vitamins here.

It functions in body growth and red blood cell production and helps in releasing metabolic energy (from fats, ketone bodies, carbohydrates, and proteins).

Indications of riboflavin deficiency include cracked lips; inflammation of the mouth and tongue; mouth sores; sore throat; oily, scaly skin rashes on the scrotum, vulva, or area between the nose and lips; red, itchy eyes that are sensitive to light; and iron-deficiency anemia. The nervous symptoms of riboflavin deficiency include numbness of the hands and decreased sensitivity to touch, temperature, and vibration.

Sources include lean meats, eggs, legumes, nuts, green leafy vegetables, dairy products, and milk provide riboflavin in the diet. Breads and cereals are often fortified with riboflavin.

Because riboflavin is destroyed by exposure to light, foods with riboflavin should not be stored in glass containers that are exposed to light.

The RDA for adults is about 1.1 – 1.3mg.

Toxicity is extremely unlikely, except in cases of injections. Riboflavin is water soluble and any excess is excreted through the urine.

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