Fish oil has a lot of anecdotal evidence that it is beneficial in improving skin conditions, and there are now also medical studies proving the same. For example, Mark G Rubin,Alan Logan, and Katherine Kim conducted a study that is present on the National Institute of Health website titled, "Acne vulgaris, mental health and omega-3 fatty acids: a report of cases"
This was in August 2008 - these researches did case studies of five individuals and reported that the administration of Omega 3 fatty acids to these persons may have improved their imflammatory acne conditions. Because this was a self-administered dosage, the researches suggest further study on the subject.
The researchers point out that in communities with lower rates of acne - there is some evidence of a higher rate of consumption of Omega 3 fatty acids through fish and its derivatives. Fish oil may be beneficial in the reduction of inflammatory acne - a reason being that the inflammatory agent leukotriene B4 - known as LTB4 is now known to up-regulate sebum production. Reduction of LTB4 improves acne conditions. Interestingly, EPA from fish oil, along with GLA from Borage oil, both inhibit LTB4 production.
From a consumer perspective, there are reports of persons affected with acne taking between 2 and 10g of fish oil per day. 2 grams is around a normal dose, and 10 grams is quite high, though this isn't a recommendation or discouragement to take a specific amount. If you are going to take a fish oil, make sure to take a high quality fish oil and consult your doctor. Good luck.
One potent fish oil is Carlson Labs Medomega 2800 - other choices are also presented at http://www.pharmaceuticalgradefishoil.org
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