Castoreum is a substance collected from the glands of Canadian, European, and Siberian beavers.

Castoreum is sometimes used for anxiety, insomnia, menstrual cramps, and other conditions, but there is no good scientific evidence to support these uses.

In foods and beverages, castoreum extract is used as a flavoring agent.

In manufacturing, castoreum tincture is used as a fragrance or fixative in cosmetics and soaps.
When taken by mouth: Castoreum is LIKELY SAFE when taken in the amounts found in food. There isn't enough reliable information to know if castoreum is safe when taken in medicinal amounts or what the side effects might be.

When applied to the skin: Castoreum 4% ointment is POSSIBLY SAFE for most people when used for up to 10 days. There isn't enough reliable information to know if castoreum 4% ointment is safe when used for longer than 10 days or when a different product is used.

Special Precautions & Warnings:

Pregnancy and breast-feeding: There isn't enough reliable information to know if castoreum is safe to use when pregnant or breast-feeding. Stay on the safe side and avoid use.


NatMed Pro rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, Ineffective, and Insufficient Evidence to Rate.
Likely effective Effectiveness definitions
Possibly effective Effectiveness definitions
Likely ineffective Effectiveness definitions
Possibly ineffective Effectiveness definitions
Insufficient evidence Effectiveness definitions
  • A type of anxiety marked by episodes of intense fear (panic disorder).
  • Absence of menstrual periods (amenorrhea).
  • Anxiety.
  • Insomnia.
  • Menstrual cramps (dysmenorrhea).
  • Other conditions.
More evidence is needed to rate the effectiveness of castoreum for these uses.

Dosing & administration

The appropriate dose of castoreum depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for castoreum. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

Interactions with pharmaceuticals

It is not known if Castoreum interacts with any medicines. Before taking Castoreum, talk with your healthcare professional if you take any medications.

Interactions with herbs & supplements

There are no known interactions with herbs and supplements.

Interactions with foods

There are no known interactions with foods.


There isn't enough reliable information to know how castoreum works in the body. has licensed monographs from TRC Healthcare.
This monograph was last reviewed on 30/04/2023 10:00:00 and last updated on 21/11/2020 02:23:37. Monographs are reviewed and/or updated multiple times per month and at least once per year.
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