But this tannin-free witch hazel water doesn't actually contain witch hazel anymore. If you want to get the astringent benefits of natural witch hazel, you'll. have to brew up a batch yourself. Boil one teaspoon of powdered leaves or twigs per cup of water for ten minutes. Strain and cool. Apply the solution directly or mix it into an ointment.
Medical literature contains no reports of harm from external use of witch hazel.
But, if witch hazel causes minor discomforts, such as skin irritation, dilute it or discontinue use. Flavor enhancement is only part of the reason. The herb is also a natural preservative. In the days before refrigeration, vegetables were often pickled in vinegar or brine to preserve them. With dill added, they lasted even longer.