The level of pantothenic acid (PaA) in the tissues such as liver, kidney and brain were measured in young rats on the subsequent days after birth. The total PaA in liver and kidney was increased with days, to reach the highest level in 30〜40 days after birth. On the other hand, in brain it was remained within same level regardless of days after birth. The free type was dominant in the level compared with the bound form in kidney.
