Astringent oils have a wide range of benefits. By shrinking pores, they can regulate the amount of oil getting onto the surface of the skin. This allows them to clear up oily skin and reduce breakouts. Astringents can also reduce the appearance of pores and wrinkles, and can give skin a brighter, younger appearance. Some people also claim that astringents can drain excess fluid from the face and reduce puffiness, making them a great product to apply in the morning when fluid retention is likely at its highest.