오메가 3 부작용Omega-3 fatty acids are derived from food. It cannot be produced in the body. Fish oil contains two types of omega-3: docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). Dietary sources of DHA and EPA include fatty fish such as salmon, mackerel, and trout, and shellfish such as mussels, oysters, and crab. Some nuts, seeds and vegetable oils contain another omega-3 called alpha-linolenic acid (ALA).
Omega 3, research on specific diseases
• heart disease
Studies have shown that people who consume omega-3s at least twice a week have a lower risk of dying from heart disease. However, studies have shown that taking omega-3 supplements has little or no benefit to heart health.
• High blood pressure
Several studies have shown small reductions in blood pressure in people who take omega-3 supplements. There is some evidence that the beneficial effects of omega-3s may be greater in people with moderate to severe hypertension than in those with mildly elevated blood pressure.
• High triglyceride and cholesterol levels.
There is strong evidence that omega-3 fatty acids can significantly reduce blood triglyceride levels. An increase in low-density lipoprotein (LDL, or ‘bad’) cholesterol levels was also observed, but high-density lipoprotein (HDL, or ‘good’) cholesterol also seemed to improve slightly.
• Rheumatoid arthritis
Studies have shown that omega-3 supplements may help reduce pain, improve morning stiffness, and relieve joint tenderness in people with rheumatoid arthritis. The relief is usually minimal, but may be enough to reduce the need for anti-inflammatory medications.
Mayo Clinic says ‘generally safe’
Omega-3 fatty acids are essential for health. Include grilled, not fried, fish in your diet. If you have high triglycerides or rheumatoid arthritis, omega-3 supplements may be helpful.
Omega-3 appears to contain very little mercury. Although generally safe, consuming too much omega-3 can increase the risk of bleeding and affect the immune response. It is unclear whether omega-3s are safe for people allergic to seafood. Take omega-3 supplements under medical supervision.
Safety and side effects
Omega-3 supplements are generally considered safe when taken as recommended. However, it may cause mild side effects such as:
• Fishy aftertaste
• Bad breath
• Heartburn, nausea, or diarrhea
• Rash
Taking large amounts of omega-3 supplements may increase your risk of bleeding and stroke.
Interactions with other medications
• Anticoagulants and antiplatelet drugs, herbs and supplements.
These types of medications, herbs, and supplements reduce blood clotting. Taking omega-3 supplements together may increase the risk of bleeding.
• Blood pressure medications, herbs, and supplements
Taking omega-3 supplements may slightly lower blood pressure. Taking these supplements along with blood pressure medications may increase their effect on blood pressure.
• Contraceptive pills
Some birth control pills may interfere with the effect omega-3s normally have on triglycerides.
• Orlistat (Xenical, Alli)
Taking omega-3s with these weight loss medications may reduce the absorption of omega-3s. Consider taking your supplements and medications two hours apart.
• Vitamin E
Consuming omega-3 may decrease vitamin E levels.
Articles published in Cancer School have been verified by the National Cancer Institute (NCI), American Cancer Society (ACS), National Cancer Center (NCC), National Cancer Institute of Japan (NCCJ), and MD Anderson Cancer Center. It was written based on verified data from the organization.
