It comprises vitamins and minerals like beta-sitosterol, campesterol, tannin, calcium, iron, magnesium, manganese, phosphorus, potassium, selenium, zinc, beta-carotene, and vitamins B1, B2, B3, and C. In spring, the bark is collected, dried and converted into either a coarse powder form used as poultices or a fine powder used to prepare a mucilaginous drink.