Vitamin A stability in receptive formulations. The effect of kalii iodidum, glucose, calcium hydroxide solution (Aqua Calcis) and Lugolis solution on stability of retinol palmitate in formulations was investigated for ten days. It was found out that vitamin A can be linked with kalii iodidum and glucose, but it should not be linked with calcium hydroxide solution and Lugol's solution, due to rapid degradation of vitamin A caused by these substances.