Side Effects of Carlson's Fish Oil

Written by james rada, jr.
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Side Effects of Carlson's Fish Oil
(Carlson Fish Oil, courtesy of

Carlson Labs has been manufacturing vitamins and supplements since 1965. One of its signature products is Norwegian fish oil from cold water fish. The fish oil capsules have vitamin E added, are packaged in dark glass and sealed in nitrogen to preserve freshness. Carlson's fish oil comes in gelatin capsules, liquid, chewable tablets and even a children's formulation.


The most common side effect you'll experience with Carlson's fish oil will be the fish taste. You'll experience this most often with the liquid and capsule forms. Other related side effects with the taste are "fish burps," indigestion, belching and reflux. In more extreme cases, you might experience stomach pains or cramps. Taking your fish oil with meals helps with these issues by diluting the taste among the other tastes in your meals.

Reverses Oxidation

Use of fish oil causes oxidative damage to lipids in the bloodstream by depleting an antioxidant called glutathione. Vitamin E is added to Carlson Fish Oil to act as a antioxidant and protect against the oxidative damage of fish oil.

Vitamin Toxicity

Carlson's fish oil derived from cod liver could possibly lead to vitamin A toxicity. This type of oil contains up to 25 per cent of the daily recommended amount of vitamin A. However, larger doses over an extended period of time can increase bone loss and bone fracture risk in senior citizens. Pregnant women should also be caution in consuming too much vitamin A.

Blood Pressure Reduction

Some people use fish oil as a way to reduce their blood pressure. However, if these people are already on blood pressure medication, they should consult their doctor to make sure the combined effect of medication and fish oil won't cause a problem.


Larger-than-recommended doses of Carlson's fish oil have been known to have an anticoagulant effect. Because of this people on blood thinners, such as aspirin therapy, could get nose bleeds or bloody urine. This effect has not been noticed with people taking the recommended doses.

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