Omega-3 supplements are usually taken to lower triglyceride levels and help protect against heart disease or stroke. Ironically, excess omega-3 can instigate stroke, according to MedlinePlus. The most traditional form of omega-3 supplements originates from fatty fish in the form of fish oil although some omega-3 supplements come from flaxseed oil or cod liver oil. The Nutritional Supplement Education Centre recommends that whichever type of supplement that you choose should be purchased from a reputable source to ensure that no toxic contaminants are included. For example, fish oil liver supplements have vitamins A and D also. Both of these vitamins can be toxic if taken in excess. Consult your doctor before taking omega-3 supplements.
Gastrointestinal Trouble
MedlinePlus indicates that omega-3 supplements tend to produce excess gas in the gastrointestinal tract. This may reveal itself as belching with a fishy odor, intestinal gas, bloating or diarrhea. Many of these side effects may be due to impurities that exist in your supplement, you could try switching brands if you experience side effects that you are uncomfortable with. The Nutritional Supplement Educational Centre suggests minimizing these side effects by starting with a low dose and gradually increasing it and by taking the supplements with your meal.
Higher Cholesterol Levels
The Nutritional Supplements Education Centre indicates that some people have noticed a correlation between taking fish oil supplements and higher low-density lipoprotein, or bad cholesterol, levels. There has not been a scientifically controlled study to verify this effect, and some patients have anecdotally reported that taking garlic supplements in addition to their omega-3 supplements have corrected this problem.
Lack of Blood Clots
MedlinePlus indicates that omega-3 acts to thin the blood and that taking excessive amounts of omega-3 in any form may act to prevent the blood from clotting. Although this blood thinning affect is helpful for those with high levels of bad cholesterol, having the blood too thin can make any cut or open wound life-threatening. MedlinePlus suggests that anyone taking an anticoagulant should avoid taking omega-3 supplements.
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