Galläpfel

growths on the young shoots of the gall oak Quercus infectoria Oliv.) caused by the bite of the gall wasp.

Gall extracts contain 60-70% tannin (tannic acid - gallotannin); also gallic acid, ellagic acid, sugar, starch, various amino acids, and other substances. Resins and essential oils.

Extracts (Tinctura gallae ÖAB) are rarely used medicinally today. One example is brushing frostbite and brushing for inflammatory gum diseases.

Otherwise, galls are used for the extraction of tannin. Formerly also used for the production of inks and dyes for dyeing textiles. Today, natural hair dyes are still obtained on the basis of extracts of bile helpenses.