Many people take omega-3 fish oil to supplement the body with essential fatty acids. The body requires essential fatty acids to reduce inflammation and to fight risk factors associated with chronic conditions including heart disease, arthritis and cancer. Fatty acids are concentrated in the brain and affect brain and memory performance, according to the University of Maryland Medical Center (see Reference 2). Besides eating fatty fish such as tuna and mackerel, many people choose to take an omega-3 fish oil supplement. Use caution when taking any dietary supplement and understand the potential side effects.
Bleeding
Bleeding can be a side effect of omega-3 fish oil. If you bruise easily or are diagnosed with a bleeding or clotting disorder, it might not be prudent to use this supplement. The same applies for anyone taking blood-thinning medications such as Coumadin or Plavix, according to University of Maryland Medical Center. Vitamin K deficiency can also decrease the blood's ability to clot, so if you have such a deficiency, consult your physician before taking omega-3 supplements. Though a rare side effect, the risk of bleeding must be considered, especially if you are taking the maximum dosage of omega-3 fatty acids. Doses of 3 mg. or higher should only be taken under the direction of a health professional.
Abdominal Discomfort
Bloating, flatulence and general abdominal discomfort may be present when taking omega-3 supplements. A person might also experience a fishy aftertaste. Diarrhea might develop, but is rare. If diarrhea does occur, decrease the amount of omega-3 fatty acids. Occasional acid reflux and indigestion have also been reported, according to Joseph Maroon, author of "Fish Oil: The Natural Anti-inflammatory." (See Reference 1.)
Low Blood Pressure
A slight decrease in blood pressure can occur when taking omega-3 supplements. Use caution if you already have low blood pressure or are taking blood pressure-lowering medications. If you are concerned about the risk of low blood pressure, take the omega-3 supplement in small doses, and build up to the desired level.
Overdose Issues
Some fish oils contain higher levels of additional vitamins, including vitamins E, D and A. Overdose of additional vitamins is uncommon, but something to be cautious about. Read the label of the product you are taking, and if it contains additional vitamins, forego any other vitamin supplements you are taking. For example, many types of fish oil contain the daily recommended amount of vitamin E to prevent spoilage of the fish oil. Taking an additional vitamin E supplement would not be necessary.
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