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Also indexed as:
Cis-9-Cetyl Myristoleate, CMO
Cetyl myristoleate (CMO) is the common name for cis-9-cetyl myristoleate. CMO was discovered in 1972 by Harry W. Diehl, Ph.D., a researcher at the National Institutes of Health. At the time, Dr. Diehl was responsible for testing anti-inflammatory drugs on lab animals. In order for him to test the drugs, he first had to artificially induce arthritis in the animals by injecting a heat-killed bacterium called Freund's adjuvant. Dr. Diehl discovered that Swiss albino mice did not get arthritis after injection of Freund's adjuvant. Eventually, he was able to determine that cetyl myristoleate was the factor present naturally in mice that was responsible for this protection. When CMO was injected into various strains of rats, it offered the same protection against arthritis.1
Where is it found?
Cetyl myristoleate is found in certain animals, including cows, whales, beavers, and mice. As a nutritional supplement it is found in a highly purified, refined form in capsules and tablets. CMO is also available in creams and lotions for topical application.
Health Concerns
CMO has been used in connection with the following conditions (refer to the individual health concern for complete information):
| Rating | Health Concerns |
 | Osteoarthritis Rheumatoid arthritis |
Reliable and relatively consistent scientific data showing a substantial health benefit.
Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
An herb is primarily supported by traditional use, or the herb or supplement has little scientific support and/or minimal health benefit. |
Deficiency Symptoms
Who is likely to be deficient?
As CMO is not an essential nutrient, no deficiency state exists.
Dosage
How much is usually taken?
Generally, CMO is taken in the amount of 400 to 500 mg daily for 30 days.
Side Effects
Are there any side effects or interactions?
No side effects or drug interactions have been reported.
At the time of writing, there were no well-known drug interactions with cetyl myristoleate.
References
- Diehl HW, May EL. Cetyl myristoleate isolated from Swiss albino mice: an apparent protective agent against adjuvant arthritis in rats. J Pharm Sci 1994;83:296-9.
Last Review: 01-21-2009

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The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires February 2010.