Products Description Betula alba (commonly known as white birch) is a deciduous tree that grows up to a medium height, anything between 70 feet and 80 feet. The bark of this tree peels and its texture is akin to that of paper and, hence, is also known as the paper birch.Betula Alba Extract is a highly purified, powdered extract from the bark of the Betula Alba Tree. Birch leaf extract is a natural remedy that offers a wide range of health benefits.