Skin irritation
Oak bark may contain up to 20% tannins depending on the type and time of harvesting (5). Tannins act as astringents, or agents t… See more

To date, there’s not enough research to identify all possible side effects of oak bark tea, supplements, and lotions.
Oak bark is generally considered safe when taken for sh… See more

Due to a lack of research on the use of oak bark in humans, there’s no recommended dosage.
Instructions provided on oak bark pills, tinctures, te… See more

There are no known reports of oak bark overdose.
Still, it’s important to adhere to the directions on the label. Since there are concerns a… See more

There have been no reports of oak bark interacting with other drugs or supplements.
However, it’s best not to take oak bark with iron supplements, as tannins may interfere with iron ab… See more