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No benefit of evening primrose oil for treating eczema, review suggests

Date:
April 29, 2013
Source:
Wiley
Summary:
Research into the complementary therapies evening primrose oil and borage oil shows little, if any, benefit for people with eczema compared with placebo, according to a new systematic review. The authors conclude that further studies on the therapies would be difficult to justify.

Research into the complementary therapies evening primrose oil and borage oil shows little, if any, benefit for people with eczema compared with placebo, according to a new systematic review. The authors, who published their review in The Cochrane Library, conclude that further studies on the therapies would be difficult to justify.

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Atopic eczema, also known as atopic dermatitis, is an itchy skin condition with no known cure. Usually emerging in childhood, it affects about 10 to 20% of school age children, who may suffer with tight, red, painful skin, sleepless nights and low self-esteem due to appearance, itching and scratching. For around 60% of people, the disorder will improve or clear up by adulthood. Creams, ointments, bath additives, topical steroids and antihistamines are some of the treatments prescribed to ease the condition. However, people often turn to complementary therapies such as evening primrose oil and borage oil in the belief that they will avoid side effects of conventional eczema treatments. Both evening primrose oil and borage oil contain high quantities of gamma linoleic acid, which was once thought to play a role in reducing skin inflammation in eczema.

The researchers analysed the benefits and side effects associated with evening primrose oil and borage oil in 27 studies involving a total of 1,596 people (adults and children) in 27 countries. Participants took evening primrose oil or borage oil, or a placebo, for between 3-24 weeks. Overall, the researchers found that taking evening primrose or borage oil offered no clear improvement of eczema symptoms over placebos. Commonly used placebos included olive oil and paraffin oil. There was also no improvement in quality of life with the complementary therapies, although only two studies considered this measure.

"There is no evidence that taking either evening primrose or borage oil is of benefit to eczema sufferers," said lead researcher Joel Bamford of the University of Minnesota Medical School and Essentia Health System in Duluth, Minnesota, US. "Given the strength of the evidence in our review, we think further studies on the use of these complementary therapies to treat eczema would be hard to justify."

Some participants in the studies experienced mild side effects such as headaches and stomach upsets or diarrhea as they also did while taking placebos. However, none of the selected studies evaluated or mentioned bleeding or anti-clotting effects, which have previously been associated with evening primrose oil. "Consumers need to be warned that oral evening primrose oil is listed as a known cause of increased bleeding for those taking Coumadin or warfarin, a very common medication," said Bamford.


Story Source:

The above story is based on materials provided by Wiley. Note: Materials may be edited for content and length.


Journal Reference:

  1. Katja Boehm, Max H Pittler, Niall Wilson, Christel van Gool, Rosemary Humphreys, Edzard Ernst. Oral evening primrose oil and borage oil for atopic eczema. Cochrane Review, 2013 DOI: 10.1002/14651858.CD004416

Cite This Page:

Wiley. "No benefit of evening primrose oil for treating eczema, review suggests." ScienceDaily. ScienceDaily, 29 April 2013. <www.sciencedaily.com/releases/2013/04/130429210913.htm>.
Wiley. (2013, April 29). No benefit of evening primrose oil for treating eczema, review suggests. ScienceDaily. Retrieved October 24, 2014 from www.sciencedaily.com/releases/2013/04/130429210913.htm
Wiley. "No benefit of evening primrose oil for treating eczema, review suggests." ScienceDaily. www.sciencedaily.com/releases/2013/04/130429210913.htm (accessed October 24, 2014).

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