It's very safe, Stan. Here's a very interesting info about the studies on it;

http://www.mclean.harvard.edu/news/p...rent.php?id=72

And this: http://www.mclean.harvard.edu/pdf/ne....stoll0605.pdf

Below is just an introduction to the article in the second link;

Several years ago, Dr. Andrew Stoll, director of the Psychopharmacology Research Laboratory at Harvard
Medical School-McLean Hospital, conducted a landmark study on the role of omega-3 fatty acids in bipolar
disorder and came up with some surprising results. The researcher discovered that when patients with bipolar
disorder consumed omega-3 from fish oil, they experienced a marked reduction in episodes of mania and
depression. Extensive research continues to demonstrate that omega-3 fatty acids form the foundation of a solid,
healthy diet, while also reducing the risk of heart disease, stroke, hypertension, and arthritis, among other
conditions.

Depletion of the essential omega-3 fatty acids in the typical American diet is linked to chronic disease
and the huge increase in the rates of depression. Researchers now speculate that the increase in
depression correlates well with the progressive depletion of omega-3s in our diet throughout the 20th
century. The shift from rural community life to fast-paced urban sprawl also ushered in an era of fast
foods, low fiber, and foods high in saturated fats, trans-fatty acids, and excessive intake of omega-6 fatty
acids.


He presents lots of great data in the article. Also some important advice;

It is important to know that the amount of active ingredients in supplements is listed on the label by
serving size, not necessarily by how much of an ingredient or compound is in one capsule. Companies
can make the serving size one, two, three, or a hundred capsules—as big or small as they want.

To determine omega-3 content, simply take the amount of EPA or EPA plus DHA per serving, as listed
on the label, and divide it by the serving size to determine how much omega-3 is in each capsule. That’s
not understood well by many people. It is important that people read labels carefully. They get fooled.

The FDA requires that supplement manufacturers list the ingredients or nutrients by serving size. But the
company can put in any serving size they want, so it may look like there is a lot of EPA, for example, in a
product, but the serving size may be 10 capsules. Consumers should be sure to divide whatever value is
in the column for the amount of EPA by the number of capsules in a serving, and read labels carefully.