... must be present for melatonin (controls sleep/wake cycles) and hemoglobin (carries oxygen in the blood) to be manufactured. SourcesVitamin ... including fortified cereals, beans, meat, poultry, fish, and some fruits and vegetables. Ready-to-eat cereal that is 100 percent ... skin reactions, sensitivity to sunlight, nausea, abdominal pain and loss of appetite. DeficienciesBecause it lowers the amount of ...