Flaxseed oil and fish oil contain important dietary fatty acids that have multiple health benefits, including prevention or treatment of dry eyes.
Other benefits include a lower risk of heart disease and a reduction of chronic inflammation that can lead to a variety of serious diseases, including cancer and stroke. Chronic inflammation also has been indicated as an underlying cause of osteoarthritis and Alzheimer's disease.
Daily supplements of flaxseed oil or fish oil, when used alone or in tandem with lubricating eye drops, appear to reduce dry eye symptoms, including burning, stinging, redness and intermittent visual disturbances. For this reason, many eye doctors now are recommending flaxseed oil and fish oil supplements for their patients who suffer from dry eyes.
Research also suggests these same fatty acids may reduce the risk of macular degeneration and cataracts. So which is better — flaxseed oil or fish oil?
Flaxseed Oil For Dry Eyes
The nutritional value of flaxseed oil (and fish oil) comes from its omega-3 fatty acids that are needed for optimum health. Flaxseed oil contains high levels of an omega-3 called alpha-linolenic acid (ALA). During digestion, ALA is converted into two different omega-3 fatty acids — called EPA and DHA — that are used throughout the body to protect cell membranes.
Flaxseed oil supplements are available both in capsule and liquid forms. Although flaxseed oil capsules are more convenient, you may need to take a large number of capsules to achieve the daily dose your eye doctor recommends to treat dry eyes.
The nutritional value of flaxseed oil is easily destroyed by light, heat and oxygen. When purchasing liquid flaxseed oil, look for a cold-pressed variety and keep it refrigerated.
Comparison Of Fish Oil With Flaxseed Oil
Fish oils and fatty fish — such as salmon, tuna and sardines — are excellent food sources of omega-3 fats essential to brain and eye health.
Fish fat contains the "long chain" omega-3s (EPA and DHA), which are the omega-3 fats the body needs for vital functions, including eyesight.
In contrast, the "short chain" ALA omega-3 fat found in plant foods such as flaxseeds must be converted to EPA and DHA in the body for beneficial eye effects. When you eat plant foods, your body converts only about 5 percent of dietary ALA into essential EPA and DHA.
Omega-6 fats are found in vegetable oils (corn, soy, cottonseed, safflower and sunflower) used in most snacks and prepared foods — whether packaged, frozen, restaurant or take-out.
Researchers agree that most people need to reduce their consumption of these otherwise healthful omega-6 fats, which block omega-3 absorption and promote inflammation when eaten in excess.
Fish oils, like flaxseed oil, are available in capsule and liquid forms. Some contain lemon flavoring or are processed in other ways to reduce any "fishy" taste. Cod liver oil is another good source of EPA and DHA omega-3 fatty acids.
A more enjoyable way to obtain fish oil benefits is by eating grilled cold-water fish at least three times a week. Good sources of EPA and DHA omega-3s are salmon, sablefish, tuna and halibut.
So Which Is Better: Flaxseed Oil Or Fish Oil?
Because fish oil contains natural EPA and DHA omega-3s (that don't have to be converted from ALA), many nutrition experts recommend fish oil over flaxseed oil.
Precautions
As with any nutritional supplement, it's a good idea to consult with your family physician or eye doctorbefore taking significant quantities of flaxseed oil or fish oil for dry eyes. This is particularly true if you take any prescription or non-prescription medicines, as adverse drug interactions can occur.
This post originally appeared on All About Vision.