These galls are caused by insects such as the oak gall wasp (Cynips quercusfolii), which lays eggs on the leaves or shoots of the tree. The oak tree produces this special structure as a defense response around the eggs. Historically, oak galls have been used for medicinal and industrial purposes.

Characteristics

• Source: Oak trees (especially species of Quercus)

• Shape: Round, hard, walnut-like

• Color: Green when young, turning brown over time

• Surface: Smooth or slightly veined

• Origin: Formed due to a symbiotic relationship with insects

Benefits

• Used as an astringent to treat diarrhea and intestinal issues

• Known for antiseptic properties traditionally used for cleansing skin wounds

• Can be used as a gargle for gum inflammation and sore throat

• Recognized for anti-inflammatory effects in traditional medicine

Uses

• Traditional medicine (in teas, tinctures, or powdered form)

• Ink production: Historically used in Ottoman and European cultures to make natural ink due to its tannin content

• Leather tanning: A natural source of tannin

• Cosmetics: Used as a natural astringent ingredient

Precautions

• Contains high levels of tannins, so excessive consumption can be toxic

• Always consult a healthcare professional or herbalist before use