Product Description

Castoreum is the exudate from the castor sacs of the mature North American Beaver (Castor Canadensis) and the European Beaver. 

Castoreum is the yellowish secretion of the castor sac. Beavers use castoreum in combination with urine to scent mark territory. Both beaver sexes have a pair of castor sacs and a pair of anal glands, located in two cavities under the skin between the pelvis and the base of the tail. The castor sacs are not true glands (endocrine or exocrine) on a cellular level, hence references to these structures aspreputial glands or castor glands are misnomers. Castor sacs are a type of scent gland.

It is used as a tincture in some perfumes and as a food additive.


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