Pyridoxine, or the active coenymes pyridoxal phosphate and pyridoxamine phosphate, is required for many enzymatic reactions in which amino acids are metabolized. These include transaminations, deaminations, decarboxylations and sulflhydrations. Deficiency symptoms include poor growth, mortality and swimming hyperirritability. Sources of pyridoxine include dried distillers solubles, dehydrated fish solubles, fish meal, wheat middlings and yeast. Recommended supplementation level for pyridoxine in commercial feeds is 50 mg/kg (Akiyama et al., 1992).