Fish Oil Side Effects
June 24, 2008
Omega-3 and Omega-6 fish oils have been promoted not only for dyslexia and ADHD but also heart disease, high blood pressure, rheumatoid arthritis, asthma, bipolar disorder and cancer. In some cases there is good evidence to support fish oils as a treatment and in others the evidence is unclear. Lots of producers of fish-oil capsules promote large dosages of supplements, but there are numerous fish oil side effects.
Certain fish oil side effects that may trouble some people. The omega-3 in the fish oil may increase the ris of bleeding when taken in large doses. The bleeding can take the form of strokes, nosebleeds and blood in the urine. As the fish oils seem to decrease platelet aggregation, bleeding times may be longer.
A major worry with fish oils and the fish they are created from is poisoning from heavy metal and other pollutants. Mercury, dioxins and polychlorinated biphenyls (PCBs) are found in some species of fish. However, mostly this fish oil side effect is associated with eating fish directly as the oil, even in contaminated fish, carries little of the pollutants.
Stomachs upset are a common side effect of fish oil supplements. Diarrhea may also occur, with potentially severe diarrhea at very high doses. There are also reports of increased burping, acid reflux/heartburn/indigestion, abdominal bloating, and abdominal pain. Fishy aftertaste is a common effect. Gastrointestinal side effects can be minimized if fish oils are taken with meals and if doses are started low and gradually increased.
People with low blood pressure or those taking blood-pressure reducing medicines should take care. One of the reported side effects of fish oil is a reduction of blood pressure. The impact on blood pressure appears to be dose dependent. One side effect of fish oils and their fatty acids is that they can result is an increase in low-density lipoprotein levels (”bad cholesterol”) by 5-10%. This is dependent on the dose used. The oils have also been noted to have an effect on blood glucose levels in people with Type 2 / Adult Onset Diabetes but this is short-term and no long-term effects have been reported.
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Thanks for the information on fish oils. I didn’t know they could have those kind of side-effects!
We recently wrote an article (http://brainblogger.com/2008/07/03/treating-psychiatric-disorders-something-smells-fishy/) on fish oils at Brain Blogger (http://brainblogger.com/). Might treating psychiatric and mood disorders be a simple and easy as eating more fish? With some of the nutritional support fish oil provides may be connected to healthier brain activity, it could possibly be.
We would like to read your comments on our article. Thank you.
Sincerely,
Kelly
i suspect i have a heart problem. sometimes when i sleep ,my breath ‘cuts’ and i cough when i sleep on my other side. can fish oil or omega3 or omega6 help me??