Pyridoxine (Vitamin B6) :It is an essential coenzyme in the conversion of the amino acid tryptophan to niacin. Pyridoxine also plays an important role in the body's metabolism of fats and carbohydrates. The synthesis of unsaturated fatty acids requires pyridoxine. Energy cannot be produced for the cells without this vitamin. pyridoxine deficiency can cause harm to dendrites, dendrites are the parts of nerve cells that carry impulses from one brain cell to another