
Omega-3 fatty acids are essential nutrients that may support heart health and lower the risk of chronic diseases. They are a type of polyunsaturated fat that the body cannot produce on its own and must be obtained through diet or supplements. Fatty fish such as salmon, mackerel, sardines, and anchovies are rich sources of omega-3s, particularly the types of omega-3s called EPA and DHA. Plant-based sources, such as flaxseed, chia seeds, and walnuts, provide ALA omega-3s, which the body does not absorb as effectively as EPA and DHA. Fortified foods and supplements are also available for those who may not consume enough omega-3-rich foods. This paragraph introduces the topic of increasing omega 3 in one's diet, highlighting the importance of omega-3 fatty acids and providing an overview of their sources.
How to increase omega 3 in diet
| Characteristics | Values |
|---|---|
| Why | Omega-3 fatty acids are "good fats" that may support heart health and lower the risk of chronic diseases. |
| Food sources | Fatty fish (salmon, mackerel, sardines, anchovies, oysters), flaxseed, chia seeds, walnuts, soybeans, spinach, Brussels sprouts, eggs, algae, krill, and more. |
| Plant-based diets | For those who don't eat fish, vegetarian sources of omega-3 include algae oils, flaxseed, chia seed, hemp seed, and walnut. However, these contain ALA omega-3, which the body does not use as effectively as EPA and DHA from animal sources. |
| Supplements | Omega-3 supplements include fish oil, cod liver oil, krill oil, and vegetarian algal oil. |
| Recommended intake | The AHA advises eating at least two servings of fatty fish, or fish rich in omega-3s, per week. Each serving should be about 3 ounces. |
| Side effects | Side effects of omega-3 supplements may include unpleasant breath, bad-smelling sweat, headache, heartburn, nausea, and diarrhea. |
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What You'll Learn
- Eat fatty fish like salmon, mackerel, sardines, and anchovies
- Consume plant-based foods like flaxseed, chia seeds, and walnuts
- Try omega-3 supplements like fish oil, cod liver oil, or algal oil
- Eat eggs, especially pasture-raised or omega-3-enriched eggs
- Include oysters, a shellfish with all three major classes of omega-3s

Eat fatty fish like salmon, mackerel, sardines, and anchovies
Fatty fish are an excellent source of omega-3 fatty acids, and salmon, mackerel, sardines, and anchovies are all great options to include in your diet. Salmon is one of the most nutrient-dense foods on the planet, containing high-quality protein and various nutrients, including large amounts of vitamin D, selenium, and B vitamins. Studies have shown that people who regularly eat fatty fish like salmon have a lower risk of heart disease, dementia, and depression.
Mackerel is also a small, fatty fish that is commonly eaten smoked and as whole fillets. Atlantic and Alaskan mackerel are high in inflammation-fighting omega-3s and low in mercury, but it is best to limit Spanish mackerel and King mackerel due to higher mercury content.
Sardines are another inexpensive, high-quality source of omega-3 fatty acids. They are also a source of many essential nutrients, including minerals, vitamins, and amino acids, which can improve clinical outcomes for patients with cardiometabolic diseases.
Anchovies are also a source of omega-3s, and anchovy oil is often used in omega-3 supplements for both humans and cats.
Including these fatty fish in your diet is a great way to increase your omega-3 intake and improve your health.
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Consume plant-based foods like flaxseed, chia seeds, and walnuts
Consuming plant-based omega-3 sources such as flaxseed, chia seeds, and walnuts is a great way to boost your omega-3 intake. These foods are rich in omega-3 fatty acids, which offer numerous health benefits.
Flaxseed, also known for its oil, is a well-known plant-based source of omega-3 fatty acids. Flaxseed oil contains a high amount of alpha-linolenic acid (ALA), a type of omega-3 that needs to be converted into eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) to have the same benefits as the omega-3s found in animal-based sources. Despite this conversion factor, flaxseed oil still provides a good omega-3 boost and is a great addition to salad dressings.
Chia seeds are an excellent plant-based source of omega-3, even outperforming flaxseed. They contain a high amount of heart-healthy omega-3 ALA, which has been linked to reduced cholesterol, triglycerides, and blood pressure, and a lower risk of cardiovascular disease and diabetes. Chia seeds are also a good source of protein and fiber, making them a nutritious addition to any diet.
Walnuts, another plant-based food, are also rich in omega-3 ALA. They offer additional nutritional benefits, including large amounts of copper, manganese, vitamin E, and plant compounds. Remember to consume the walnut skin, as it contains most of the walnut's phenol antioxidants, providing valuable health benefits.
Incorporating these plant-based sources of omega-3 into your diet can help you meet your omega-3 needs, especially if you are vegetarian, vegan, or simply not a fan of fish. However, keep in mind that the omega-3 ALA found in these plant sources is not as active in the body as the omega-3 EPA and DHA found in animal-based sources, so you may also want to consider an omega-3 supplement to ensure you're meeting your individual needs.
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Try omega-3 supplements like fish oil, cod liver oil, or algal oil
If you don't eat a lot of omega-3-rich foods, you may want to consider taking omega-3 supplements. Omega-3 fatty acids are essential nutrients that your body needs to function and support your heart health. They are considered "'good'" or "healthy" fats because they support your heart health when used in moderation.
Fish oil, cod liver oil, and algal oil are all popular omega-3 supplements. Fish oil is derived from the flesh of fatty fish such as mackerel, sardines, salmon, and anchovies. It is a good source of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which are two types of omega-3 fatty acids found in seafood. Cod liver oil, on the other hand, is derived specifically from the livers of codfish, such as Atlantic cod and Pacific cod. In addition to EPA and DHA, cod liver oil contains vitamins A and D, which can be beneficial if you are deficient in these nutrients. However, high levels of vitamin A can lead to vitamin A toxicity, so it is important to be cautious when taking cod liver oil. Algal oil is a plant-based alternative to fish oil for those who are vegetarian, vegan, or allergic to fish. It is also a good source of EPA and DHA.
When choosing an omega-3 supplement, it is important to consider the source and quality of the oil. Look for supplements that come from sustainable sources and are tested for purity, such as mercury levels in fish oil. Additionally, it is always a good idea to speak with your healthcare provider before starting any new supplement to ensure that it is safe and appropriate for your individual needs.
It's worth noting that while omega-3 supplements can be beneficial, it's generally recommended to prioritize getting your omega-3s from dietary sources, such as fatty fish, nuts, seeds, and plant oils.
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Eat eggs, especially pasture-raised or omega-3-enriched eggs
Omega-3 fatty acids are essential nutrients that provide multiple health benefits. They are a healthier alternative to saturated fats in your diet and are vital for the functioning of your body's cells. Omega-3s are also good for your heart health, helping to lower triglyceride levels and control cholesterol, thereby reducing the risk of cardiovascular disease. They may also help lower the risk of chronic diseases, arthritis, and cognitive conditions like Alzheimer's disease.
To increase your omega-3 intake, you can eat certain types of fish, seeds, and nuts. Fatty fish like salmon, mackerel, sardines, and anchovies are rich in omega-3s. Plant-based sources of omega-3 include flaxseed, chia seeds, walnuts, soybeans, spinach, and Brussels sprouts.
If you don't eat much fish or are unable to eat seafood, eggs are a great alternative source of omega-3. Pasture-raised eggs, in particular, are a good option. These are eggs laid by hens that are allowed to roam outdoors and feed on grasses, plants, and insects in addition to their regular feed. Pasture-raised eggs are higher in omega-3s than conventional eggs, as well as being richer in vitamins A and E. They also contain less cholesterol and saturated fat.
If you don't have access to pasture-raised eggs, omega-3-enriched eggs are your next best option. These are laid by hens that are fed a diet supplemented with omega-3-rich ingredients like flaxseed, algae, or fish oils. The amount of omega-3 in an enriched egg can vary from around 100 to 500 mg per egg, so check the labels to be sure. Omega-3-enriched eggs have significantly more omega-3 than conventional eggs, but they don't contain as much omega-3 as oily fish.
In addition to being a good source of omega-3, eggs are also a fantastic source of inexpensive, high-quality protein. One egg contains seven grams of protein, as well as 14 essential nutrients including choline and vitamin D. They are easily digested and are a great option for people with digestive issues.
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Include oysters, a shellfish with all three major classes of omega-3s
Oysters are a shellfish that contain all three major classes of omega-3s: ALA, DHA, and EPA. EPA helps to reduce inflammation, while DHA is important for brain development in children and brain function in adults. ALA, the form of omega-3 typically found in plants, must first be converted into EPA and DHA before it can be used by the body. However, this conversion process is inefficient, with only 1-10% of ALA being converted into the bioavailable forms of EPA and DHA.
Therefore, it is important to consume foods that contain EPA and DHA, such as oysters, to ensure you are getting enough of these essential nutrients. Oysters offer a way to get more bioavailable omega-3s without eating fish, which may be a concern due to the high mercury content of certain seafood. Oysters are also one of the best food sources of zinc, and provide a good amount of copper and vitamin B12.
In addition to their high omega-3 content, oysters are extremely nutritious and provide a major source of protein for communities close to the shore. They are also a sustainable food choice, as oyster farming is a regenerative practice that helps to clean our oceans. While oysters are typically eaten raw, they can also be enjoyed smoked or canned as a snack or appetizer.
Including oysters in your diet can be a delicious and ethical way to increase your omega-3 intake and support your overall health.
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Frequently asked questions
Fatty fish such as salmon, mackerel, sardines, anchovies and oysters are all rich in omega-3 fatty acids. Fish and seafood sources of omega-3 tend to be higher in DHA and EPA, while plant sources are typically higher in ALA.
Plant-based sources of omega-3 include flaxseed, chia seeds, walnuts, soybeans, spinach, Brussels sprouts, seaweed, nori, spirulina, and chlorella.
Omega-3 fatty acids are considered "good" or "healthy" fats because they support heart health and may reduce your risk of chronic diseases. They also provide your body with energy and support the health of many body systems, including your cardiovascular and endocrine systems.




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