For those of you used to hearing how wonderful fish oils are for everything, researchers are beginning to discover that, like anything, fish oils are at times appropriate and at times not so appropriate. In Chinese dietary therapy fish is forbidden anytime someone has a bronchial infection. However, until recently there was no hard evidence that this was in fact a valid concern.
 
In this recent study, they took a group of mice and gave them the flu. They then fed some of the mice fish oils and others served as a control group and only ate their regular diets. The researchers found the fish oil fed mice had much lower levels of inflammation in their lungs than the control mice. However, the fish oil fed mice had a 40% higher mortality rate than the controls. That means you may be much more likely to die from the flu if you take fish oils.
 
J Nutr. 2009 Aug;139(8):1588-94. Epub 2009 Jun 23.