The Anti-Inflammatory Power of Omega-3s: What You Should Know

Understanding Inflammation and the Role of Omega-3s

Inflammation seems to take the blame for almost everything these days. Sore joints? Inflammation. Heart disease? Inflammation. Feeling sluggish? Probably inflammation. It is often cast as the villain in a health mystery, but the truth is that that is not the full story.

Inflammation is part of the body’s natural defense system. It helps you heal from injury, recover from illness, and repair damaged tissue. The problem arises when it doesn’t fully settle down. Instead of turning off once the job is done, it can linger quietly in the background. And over time, ongoing inflammation can strain blood vessels, tissues, and metabolic systems. That said, it is that gradual buildup that links inflammation to conditions like cardiovascular disease and metabolic dysfunction, and is what ultimately gives it a bad reputation (1, 2).

This shift in balance is where omega-3 fatty acids enter the conversation. Omega-3s are essential fats, meaning the body cannot produce them on its own, and they must come from food. This is because, once in the body, they help regulate the inflammatory response and influence key pathways involved in heart and metabolic health (1, 2, 3).

Because of this, omega-3s serve as foundational nutrients in an anti-inflammatory lifestyle. They fit naturally into evidence-based eating patterns such as the DASH and Mediterranean-style diets, both of which are linked to improved cardiovascular and metabolic health (3, 4).

In the sections ahead, we will explore what omega-3 fatty acids are, how they influence inflammation at a deeper level, what current research says about their role in heart and metabolic health, and how to include them in everyday meals in a way that feels realistic and sustainable.

1. What Are Omega-3 Fatty Acids?

Omega-3 fatty acids are a type of polyunsaturated fat that the body needs but cannot produce on its own. Because of this, they are considered essential fats and must be obtained through food or supplements (1, 2).

There are three main types of omega-3 fatty acids:

• EPA (eicosapentaenoic acid): EPA is primarily found in fatty fish and seafood. It plays a major role in reducing inflammation and supporting cardiovascular health.
• DHA (docosahexaenoic acid): DHA is found in marine sources and is especially important for brain, eye, and nervous system health. It works alongside EPA to support heart and metabolic health.
• ALA (alpha-linolenic acid): ALA is found in plant-based foods such as flaxseeds, chia seeds, walnuts, and canola oil. The body can convert ALA into EPA and DHA, but this process is limited. Thus, only a small percentage is converted into the active forms that directly regulate inflammation.

Because the body converts only a small amount of ALA into EPA and DHA, marine-based sources of omega-3s, such as fish, tend to have a more direct effect on inflammation and heart health. EPA and DHA are already in the forms the body uses, so they can more readily influence the signaling pathways involved in cardiovascular function. For this reason, many heart health guidelines recommend eating fatty fish regularly as part of a balanced eating pattern (2, 3).

Understanding the difference between ALA, EPA, and DHA helps explain why food choices matter. While plant-based sources still contribute to overall omega-3 intake, including marine sources may provide additional support for heart health due to their direct availability in the body.

2. How Omega-3s Influence and Regulate Inflammation

Now that we know what omega-3s are, it’s time to look at how they actually work inside the body.

But, before we go further, we need to pause for a moment and introduce another important group of fats: omega-6 fatty acids. We cannot really discuss omega-3 and its anti-inflammatory properties without first giving omega-6 a proper introduction.

Like omega-3s, omega-6 fats are essential, meaning the body cannot make them, and they must come from food. They are found in foods such as vegetable oils, nuts, and seeds and play important roles in growth, brain function, and immune health (3, 5). I want you to keep in mind that they are not harmful on their own. In fact, as you can see, they are necessary for overall health. The key to controlling inflammation lies in how omega-6 and omega-3 fats interact.

This is going to get a bit sciency, but stay with me. Inflammation is controlled by chemical messengers that act like signals. These messengers, including substances called cytokines and prostaglandins, help regulate when inflammation increases and when it settles down. Many of these signals are made from fats stored in our cell membranes. This means that the types of fats we eat can influence the strength and duration of an inflammatory response (2).

One important omega-6 fatty acid involved in this process is arachidonic acid. When the body experiences stress or injury, arachidonic acid is converted into compounds that increase inflammation (2). In the short term, this response supports healing and protection. But when this pathway stays active longer than needed, it can contribute to ongoing, low-grade inflammation.

This is where omega-3s begin to shift the balance.

EPA, the marine-based omega-3 found in fatty fish, competes with arachidonic acid for the same enzymes in the body. Enzymes are special proteins that act like tiny workers or helpers. They speed up chemical reactions and help turn one substance into another. In this case, enzymes help convert fats into signaling compounds. When EPA is present, these enzymes use it to produce a different set of compounds. And these EPA-derived compounds are less inflammatory than those produced from omega-6 fats (1, 2). As a result, the overall inflammatory response becomes more regulated.

DHA also supports this process, but in a different way. After inflammation has done its job, the body needs a way to bring the response back down. DHA helps form compounds called resolvins and protectins. And can you guess what they do? They resolve and protect (2). These support the regulation of inflammation and promote tissue repair. This phase helps prevent inflammation from lingering longer than necessary.

Omega-3 fatty acids also influence inflammation at the genetic level. Research shows that EPA and DHA can reduce the activity of certain signaling pathways that trigger the production of pro-inflammatory cytokines (2). And by affecting these pathways, omega-3s help lower the body’s overall inflammatory load.

In short, taken together, omega-3 fatty acids do not eliminate inflammation. Instead, they help guide and regulate it. They support balance and promote a healthier internal environment over time. And this has been measured in research settings.

3. Omega-3s and Heart Health

The connection between omega-3 fatty acids and heart health has been studied for many years. This is because inflammation plays a central role in the development of cardiovascular disease, making omega-3s especially relevant for long-term heart health (2,3).

One of the most consistent findings in the research is the effect of EPA and DHA on triglyceride levels. Triglycerides are a type of fat found in the blood, and elevated levels are associated with increased cardiovascular risk. Evidence shows that marine-based omega-3 fatty acids (AKA: EPA and DHA) can lower triglyceride levels, particularly when consumed at higher doses under medical supervision (2, 9).

Omega-3s also appear to support heart health in other ways. They may help improve blood vessel function, support healthy blood pressure levels, and reduce inflammatory activity within the vascular system (2,3). For these reasons, leading health organizations, including the American Heart Association, recommend regularly consuming fatty fish as part of a heart-healthy dietary pattern(3).

At the same time, it is important to interpret this research carefully. Not all studies on this matter show the same results, and the benefits of omega-3s can vary depending on factors such as the dose used, the health of the population being studied, overall diet, and heart disease risk. With that, some large clinical trials have reported modest effects, while others have shown more noticeable improvements, particularly in individuals with elevated triglycerides or existing cardiovascular disease (2, 9). Additionally, differences in supplement type, the balance of EPA to DHA, and the way the study was designed can also influence outcomes.

Because of these differences, omega-3s are best viewed as one part of a larger heart health plan rather than a single solution. Research consistently shows that eating patterns that naturally include omega-3-rich foods, such as the DASH and Mediterranean-style diets, are linked to better cardiovascular outcomes (3, 4). When omega-3 intake is combined with other supportive habits like balanced meals, regular physical activity, and healthy blood pressure management, these strategies work together to create a stronger overall impact on heart health.

4. Omega-3s in Obesity, Hypertension, and Metabolic Health

Obesity and high blood pressure are often connected to ongoing, low-level inflammation in the body. Extra body fat, especially around the abdomen, can release inflammatory signals that affect metabolism over time (2, 10). This can influence how the body manages blood sugar, blood pressure, and cholesterol levels. And because of this connection, researchers have studied whether omega-3 fatty acids can support metabolic health.

Some clinical trials show that marine-based omega-3s can improve certain inflammatory markers in individuals with obesity (10). These findings suggest that omega-3s may help support a healthier internal balance in people with higher metabolic risk. Additionally, as mentioned before, omega-3s have also been studied alongside structured eating patterns. For example, research looking at omega-3 intake combined with the DASH diet in individuals with obesity, hypertension, and high cholesterol has shown improvements in blood lipid levels and blood pressure markers (4). This reinforces the idea that nutrients work best as part of an overall eating pattern.

Even though study results can vary, the overall body of evidence suggests that including omega-3-rich foods can support long-term metabolic health. When these foods are part of a balanced and consistent eating pattern, they may contribute to healthier weight management, support stable blood pressure, and promote improved metabolic function.

5. Omega-3 vs Omega-6: Understanding the Balance

After exploring how omega-3s influence inflammation and support heart and metabolic health, it helps to step back and look at the bigger dietary picture.

By this point in the conversation, it is completely normal for omega-6 fats to start sounding like the troublemaker in the room. When we talk about inflammatory pathways and imbalance, omega-6 can easily take on that role. But the issue is not the presence of omega-6. It is the proportion.

In many modern eating patterns, omega-6 intake is high while omega-3 intake remains relatively low (3, 5). This shift has happened gradually as packaged snacks, convenience foods, and refined vegetable oils that contain higher amounts of omega-6 fats have become more commonly consumed, while fatty fish and other omega-3-rich foods are eaten less frequently.

When this imbalance persists over time, it can influence the body’s overall inflammatory tone. Since, as we discussed earlier, these fats compete in shared pathways and the ratio between them matters.

Rather than removing omega-6 from the diet, the more effective strategy is to increase omega-3 intake. Small, consistent additions such as fatty fish, flaxseeds, or chia seeds can gradually improve this balance.

In practical terms, this conversation is less about restriction and more about rebalancing the plate!

6. Best Food Sources of Omega-3 Fatty Acids

Throughout this blog, we have mentioned fish here, chia seeds there, and walnuts sprinkled in between. Now let’s pause and gather everything into one clear, practical list.

Cheat sheet: Omega-3 fatty acids come from two main categories of foods: marine sources and plant-based sources. The type of omega-3 you get depends on what you eat.

EPA and DHA (Marine-Based Omega-3s)

EPA and DHA are found primarily in fatty fish and seafood (1, 2). These are the forms most directly associated with cardiovascular and inflammatory support.

Common food sources include:

• Salmon
• Sardines
• Mackerel
• Herring
• Anchovies
• Oysters and mussels

Because these foods provide EPA and DHA together, many heart health guidelines recommend eating fatty fish at least two times per week as part of a balanced dietary pattern (2, 3).

ALA (Plant-Based Omega-3)

ALA is found in plant foods (1, 2). Common food sources include:

• Flaxseeds and flaxseed oil
• Chia seeds
• Walnuts
• Hemp seeds
• Canola oil

While ALA contributes to overall omega-3 intake, the body converts only a small portion into EPA and DHA (2). Even so, these foods can support a balanced eating pattern and help improve overall fatty acid intake.

For many people, increasing omega-3 intake does not require a major shift in eating habits. Choosing salmon for dinner once or twice a week, adding ground flaxseed to yogurt or oatmeal, or reaching for walnuts as a snack can gradually increase intake over time.

7. Do You Need an Omega-3 Supplement?

After reading a whole blog about the anti-inflammatory power of omega-3s, it is natural to wonder whether a supplement might simplify things. The truth is, every now and then, the supplement aisle seems to call when it comes to meeting nutrition needs. With rows of fish oil bottles and bold heart health claims, taking a capsule may feel like the simplest solution.

Fish oil supplements are one of the most commonly used nutritional products because they provide EPA and DHA, two of the three fatty acids we’ve been talking about. But whether you need one depends on your current diet and health status.

For general heart health, many organizations recommend about 250 to 500 milligrams per day of combined EPA and DHA (2). However, this amount can often be achieved by eating fatty fish twice a week.

For individuals with established heart disease, intake of EPA and DHA closer to 1,000 milligrams per day may be recommended under medical guidance (2).

When triglyceride levels are elevated, higher doses may be used. Clinical guidance notes that 2 to 4 grams per day of EPA and DHA can reduce triglyceride levels by roughly 20 to 30 percent, and sometimes more (2, 9). These higher amounts are considered therapeutic and should only be taken under the supervision of a healthcare provider.

When it comes to over-the-counter supplements in Canada, it is important to understand that many are regulated as Natural Health Products (NHPs) under Health Canada. Unlike in the United States, manufacturers must obtain approval before selling these products, including submitting evidence for safety, quality, and certain health claims. Approved products are assigned a Natural Product Number (NPN), which appears on the label (6, 7, 8).

However, despite this regulatory framework, the quality and composition of omega-3 supplements can still vary between brands, including the amounts of EPA and DHA per capsule and overall product purity. This is why it remains important to choose supplements carefully.

If you are considering a supplement, look for one that:

• Clearly lists the exact amount of EPA and DHA per serving
• Displays a valid Natural Product Number (NPN) on the label
• Has been third-party tested for purity and potency (e.g., IFOS certification)
• Meets safety standards for contaminants such as mercury, PCBs, and dioxins

Omega-3 supplements can also interact with certain medications. At higher doses, they may increase the risk of bleeding when combined with blood thinners or antiplatelet medications (2, 9). And, they can also lower blood pressure slightly, which may require monitoring if taken alongside blood pressure medications.

For many people, regular fish intake is enough. But for others, especially those with high triglycerides or limited seafood intake, supplementation may be appropriate. As with most areas of nutrition, the best approach is the one that works best for you, after discussing your interests with a health care professional.

8. Building an Anti-Inflammatory Lifestyle

By now, it is clear that omega-3s play an important role in supporting a balanced inflammatory response. But here’s the reassuring part: you do not have to get everything perfect to see benefits. An anti-inflammatory lifestyle is built on patterns, not pressure.

Omega-3-rich foods fit naturally into eating styles like the DASH and Mediterranean Diets, which focus on fruits, vegetables, whole grains, lean proteins, nuts, seeds, and healthy fats (including fatty fish) (3, 4). These are all foods that support heart and metabolic health over time. That said, food is only one piece of the puzzle!

Daily habits also shape inflammation. Regular movement, consistent sleep, managing stress, and limiting heavily processed foods all play a role in how the body regulates itself. Think of omega-3s as one helpful tool within a much larger toolkit.

This is why small, steady changes matter more than dramatic overhauls. Adding fatty fish to your weekly routine, sprinkling flaxseed into a smoothie, or choosing walnuts for a snack are simple shifts that add up.

Remember that an anti-inflammatory lifestyle is not about restriction or chasing the latest health trend; it is about building realistic habits that support your body day after day.

Wrapping It Up: Looking Beyond the Headlines

If there is one thing the wellness world does well, it is creating noise. Inflammation is blamed for nearly everything nowadays. Foods are labeled as inflammatory or anti-inflammatory overnight, and supplements promise quick fixes. It can easily begin to feel like you are constantly one headline away from getting it wrong.

But health is not built on headlines; it is built on understanding how your body works, recognizing that context matters, and making thoughtful choices that fit your individual needs. And omega-3s are one important piece of that picture, not because they are trendy, but because they play a measurable role in how the body maintains balance.

The difference between confusion and confidence often comes down to education. When you understand the science, you can step away from extremes and focus on what is practical, sustainable, and realistic for you.

If you’re looking to better understand how your everyday food choices influence inflammation, I’d love to support you along the way. Together, we can create a personalized, balanced approach that fits your lifestyle—one that supports your heart and long-term health without unnecessary restriction or confusion.

You don’t have to sort through the noise of nutrition headlines on your own. Let’s take that first step together.

✨ Here’s to building an anti-inflammatory lifestyle that feels realistic, sustainable, and grounded in evidence—where small, consistent changes truly make a difference over time.

Ready to feel more confident about your nutrition and learn how to incorporate omega-3s in a way that works for you? Book a Discovery Call with our dietitian, Beata, for expert advice to explore how we can create simple, personalized strategies to support your heart health. Let’s make healthy eating practical, balanced, and enjoyable!

Yours in Health,

Beata Blajer, RD, CDE, IFNCP

Reference List

1. Cleveland Clinic. (2022, November 17). Omega-3 Fatty Acids. Cleveland Clinic. https://my.clevelandclinic.org/health/articles/17290-omega-3-fatty-acids
2. National Institutes of Health. (2023, February 15). Omega-3 Fatty Acids. Nih.gov. https://ods.od.nih.gov/factsheets/Omega3FattyAcids-HealthProfessional/
3. Omega-3, Omega-6 and Heart Health | Heart Foundation. (2025). Heartfoundation.org.au. https://www.heartfoundation.org.au/healthy-living/healthy-eating/omega-3-omega-6-heart-health
4. Yin, H., Zhou, Y., Zhou, Y., Ren, L., & Ma, L. (2025). Retrospective analysis of omega-3 fatty acids and the DASH diet in hyperlipidemia and hypertension management among obese individuals. Frontiers in Nutrition, 12. https://doi.org/10.3389/fnut.2025.1704552
5. Harvard Health Publishing. (2019, August 20). No need to avoid healthy omega-6 fats. Harvard Health. https://www.health.harvard.edu/newsletter_article/no-need-to-avoid-healthy-omega-6-fats
6. Health Canada. (2003). Natural health products regulations (SOR/2003-196). Government of Canada. https://laws-lois.justice.gc.ca/eng/regulations/SOR-2003-196/
7. Health Canada. (2023). Natural and non-prescription health products directorate. Government of Canada. https://www.canada.ca/en/health-canada/services/drugs-health-products/natural-non-prescription.html
8. Health Canada. (2023). Good manufacturing practices for natural health products. Government of Canada. https://www.canada.ca/en/health-canada/services/drugs-health-products/natural-non-prescription/legislation-guidelines/good-manufacturing-practices.html
9. Mayo Clinic Staff. (2023, August 10). Fish oil. Mayo Clinic. https://www.mayoclinic.org/drugs-supplements-fish-oil/art-20364810
10. Torres-Vanegas, J., Rodríguez-Echevarría, R., Campos-Pérez, W., Rodríguez-Reyes, S. C., Reyes-Pérez, S. D., Pérez-Robles, M., & Martínez-López, E. (2025). Effect of a Diet Supplemented with Marine Omega-3 Fatty Acids on Inflammatory Markers in Subjects with Obesity: A Randomized Active Placebo-Controlled Trial. Healthcare, 13(2), 103–103. https://doi.org/10.3390/healthcare13020103