Effect of inhalation of coal fly ash on vitamin A distribution in organs of the rat.

Fly ash contains several polycyclic aromatic hydrocarbons. The effect of inhalation of coal fly ash on vitamin A distribution in various organs of rat has been studied. Inhalation of fly ash for 6 h daily, for 15 d, decreased vitamin A content in liver. The absorption of orally given [3H]retinyl acetate was decreased and so was its localization in liver of rats inhaling coal fly ash.