Omega-3 fatty acids are essential nutrients that are found in many different types of fish and in dietary supplements. Your body is unable to produce omega-3 fatty acids, so you have to make sure your diet includes sufficient amounts of the nutrient. Omega-3 fatty acids are used to maintain brain function and normal growth and development, the University of Maryland Medical Center states. Fish oil and other omega-3 supplements are also used to reduce the risk of heart disease. However, despite the potential benefits of omega-3 fatty acids, there are some negative side effects associated with the supplement.
Allergic Reaction
If you have had a previous allergic reaction to fish, fish oil or other omega-3 supplements, you should avoid taking omega-3. In rare cases, patients have experienced a widespread rash after taking omega-3, MayoClinic.com reports. More severe allergic reactions can cause facial swelling or difficulty breathing. If you experience any of these symptoms after taking omega-3 fatty acids, immediately stop taking the supplement and call your doctor.
Vitamin Level Abnormalities
Omega-3 supplements such as fish oil, when used for extended periods, can cause abnormalities with vitamin levels within your body, the American Cancer Society reports. You may develop a severe vitamin-E deficiency if you are taking omega-3 supplements that do not contain vitamin E. Furthermore, overuse of omega-3 can lead to the buildup of toxic amounts of vitamins A and D. These effects typically only occur after prolonged use of omega-3.
Gastrointestinal Effects
Some of the milder side effects of omega-3 fatty acids include a fish aftertaste and gastrointestinal discomfort, the University of Maryland Medical center warns. You may experience bloating, flatulence, frequent belching and diarrhea. These symptoms are dose-dependent and therefore worsen as the dosage of omega-3 is increased. The use of time-release omega-3 supplements may help prevent these negative symptoms.
Excessive Bleeding
Exceptionally large doses of omega-3 fatty acids, or Eskimo doses, increase your risk of having a hemorrhagic stroke, according to MayoClinic.com. Omega-3 fatty acids may also cause frequent nosebleeds and blood in the urine. Omega-3 fatty acids interfere with the function of platelets and other factors responsible for causing your blood to clot. Excessive bleeding is dangerous and if you think you are at risk of this side effect, consult your doctor. Furthermore, if you are anemic or about to undergo a surgical procedure, talk to your doctor about whether or not you should discontinue your intake of omega-3
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