Omega-3 supplements contain omega-3-acid ethyl esters, usually found in fish oil as well as other foods such as nuts. MayoClinic.com notes that omega-3 fatty acids may help reduce atherosclerotic plaques. These substances build up in your arteries and potentially can produce strokes, coronary artery disease and cardiovascular events such as heart attacks. Omega-3 supplements combat triglycerides, a type of fat that contributes to plaque formation. Although medical research indicates the effectiveness of omega-3 supplements, consult with your doctor before use.
Flu-Like Syndrome
Omega-3-acid ethyl esters taken as supplements may cause a side effect that makes you feel as though you have the flu. Called flu-like syndrome, this side effect produces symptoms such as a general sense of tiredness or fatigue, muscle aches, runny nose, sore throat, headache, congestion and fever. Flu-like syndrome is a temporary and non-serious side effect of omega-3 and most likely will stop with continued use of the supplement. If the symptoms persist, seek advice from your physician.
Changes in Taste
Because omega-3 supplements are derived from fish oil and other substances, ingesting the capsules may produce a temporary and unpleasant change in the way food and drinks taste. As your body digests omega-3, you may get a fishy taste or some other unusual taste in your mouth. The supplement may also cause burping, which can result in a bad taste or smell. Taste changes and burping are non-serious side effects that typically stop without medical help. Consult a medical professional if these side effects persist.
Back Pain
Back pain frequently occurs when your first start using omega-3 supplements, but usually goes away with continued use. If you develop back pain while taking omega-3 supplements, contact your doctor if the pain persists for more than a few days or becomes severe.
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