Young Blonde Girl Undresses Her Pink Dress In The Nature At Birch Trees

- Birch bark is high in betulin and betulinic acid, phytochemicals which have potential as pharmaceuticals, and other chemicals which show promise as industrial lubricants.
- Birch bark can be soaked until moist in water, and then formed into a cast for a broken arm.
- The inner bark of birch can be ingested safely.
- In northern latitudes, birch is considered to be the most important allergenic tree pollen, with an estimated 15-20% of hay fever sufferers sensitive to birch pollen grains. The major allergen is a protein called Bet v I.