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Can Omega-3 Fatty Acids Help with Depression?

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Omega-3 fatty acids are essential and have numerous health benefits, including depression. Explore the article to learn how they help fight depression.

Written byDr. Mahalakshmi. A. U

Medically reviewed byDr. Vishal Anilkumar Gandhi

Published At December 28, 2022
Reviewed AtMarch 18, 2025

Introduction

Depression is a general condition affecting about 3.8 percent of the world's population - that is, around 280 million individuals worldwide. Since the majority of people eat fish and fish oils regularly, researchers have studied the effects of fish on depression for over ten years. The big news? Research reveals that fish play a significant part in improving mental health. Fish and marine algae are the typical sources of omega-3 fatty acids, which are crucial for brain function and general well-being. Adding this to your diet helps improve your mood and boost your health.

What Are Omega-3 Fatty Acids?

Omega-3 fatty acids, known as omega-3 oil, are polyunsaturated fatty acids. These are fats required by our body, but do not produce them. We must get it through food or supplements. You may know omega-3 fatty acids boost mental health, but do omega-3 fatty acids have any role other than boosting mental health? Yes, they play a significant role in reducing the risk of cancer, cardiovascular diseases, and depression. Also, omega-3 fatty acids are essential substances that benefit metabolism, brain function, and physical well-being.

What Are the Types of Omega-3 Fatty Acids?

Do you know omega-3 fatty acids exist in three forms? Here they are-

  • Alpha-linolenic acid or ALA.

  • Eicosapentaenoic acid or EPA.

  • Docosahexaenoic acid or DHA.

What Are the Sources of Omega-3 Fatty Acids?

Do you know omega-3 fatty acids are not just available in animal-based sources but also in plant-based sources? Many are aware that Omega-3 fatty acids are present in animal-based foods. But, it is available in plant-based sources too.

Plant-Based Sources:

Alpha-linolenic acid, ADA, is found in plants and plant-based oils. Familiar sources of alpha-linolenic acid are the following.

  • Walnuts.

  • Chia seeds.

  • Soybean oil.

  • Flaxseed.

  • Canola oil.

Animal-Based Sources:

EPA and DHA are found in fish and animal-based sources.

  • Fish oil.

  • Cod liver oil.

  • Krill oil.

  • Fish like sardine, mackerel, and salmon.

  • Algae oil.

Omega-3 fatty acids accumulate in fish as they eat marine algae. So, algae oil is a better source of omega-3 fatty acids for vegetarians.

How Might Omega-3s Improve Depression?

As we all know, the primary function of omega-3 fatty acids is to regulate one's metabolism. Omega-3 fatty acids alter the cell structure of each cell membrane. So, they easily carry through cell membranes of the brain and interact with mood-related molecules, so they act as antidepressants. They also possess some anti-inflammatory actions which may relieve depression. Higher consumption of seafood, a source of omega-3 fatty acids by lactating mothers, leads to higher DHA levels in the mother's milk. This increased DHA level further helps to lower the prevalence of postpartum depression.

What Dosage Is Beneficial for Depression?

The dose of omega-3s for depression ranges between one gram and ten grams per day. Therefore, the most prescribed dose is one to two grams daily, a combination of EPA and DHA. If you have bipolar disorder, omega-3 fatty acids should be cautiously taken along with a prescribed mood stabilizer, as it can affect mood regulation. Always discuss it with your physician before taking any supplements.

What Are the Side Effects of Omega-3s?

Do you know sometimes, including healthy fats in your daily diet can cause certain side effects? Let’s learn about it.

  • Omega-3 fatty acids are generally safe. Stomach upset and fishy taste were the frequently reported issues. But now, it has been reduced due to the advances in manufacturing processes.

  • Omega-3 benefits the brain in its development. Thus, taking it during pregnancy benefits pregnant mothers and babies. But, it should be taken cautiously since no documented data is available to support it.

  • Also, bipolar disorder patients should take it with caution since it may cause manic episodes.

  • Omega 3 fatty acids, when combined with blood thinners, cause bleeding.

What Does the Research Say About Omega-3s and Depression?

Scientists have been conducting various research to identify the effectiveness of omega-3 fatty acids in depression and mental illness. What do you think the study results could be? Well, the results are promising. More than 30 studies were conducted to identify the impact of omega-3s on mental health. Some of the key research findings are-

  • In 2009, scientists used EPA to treat three types of depression: recurrent depression in children and adults, and bipolar depression. Studies revealed that EPA helped to improve depression.

  • In 2004, the National Institute of Health proved that the combination of DHA and EPA helps relieve symptoms of depression with minor depression, major depression, postpartum depression, and suicidal ideation.

  • Scientists of Maudsley Biomedical Research Center proved the effectiveness of omega-3 fatty acids over depression.

  • Another study revealed that omega-three fatty acid helps in learning and memory.

  • A study by Maes et al. compared 34 individuals with depression and 14 healthy people. It was found individuals with depression had lower omega-3 levels, proving the connection between omega-3 levels and depression.

  • Mamalakis et al. study shows that individuals with depression had lower DHA levels in their body fat than a healthy person.

I guess these study results help you understand the role of omega-3 fatty acids in reducing depression. So, if you are feeling low or depressed, take a supplement or foods rich in omega-3 to help you overcome it.

What Includes The Health Benefits of Omega-3 Fatty Acids?

Omega-3s not only help in reducing depressive symptoms but also have other benefits. Can you guess what could be those benefits? Here they are -

  1. Cardiovascular Diseases and Stroke: How does omega-3 help in controlling stroke? Any guess? Omega-3 fatty acids lower blood pressure (BP), and reduce the heart rate and the risks of certain circulatory diseases. Moreover, omega-3 fatty acids lower the triglycerides level in the blood and hence prevent the person from developing cardiovascular diseases and stroke.

  2. Cancer. How could a fatty acid help in cancer treatment? Polyunsaturated fatty acids are considered immune nutrients and are used for nutritional therapy in cancer patients. In addition, combining chemotherapy and omega-3 fatty acids with palliative care cures cancer.

  3. Depression and Anxiety: Diet and supplements containing omega-3s help anxiety and depression.

  4. Asthma: Omega-3 fatty acids help treat asthma due to their anti-inflammatory properties.

  5. Bone Health: Fish-based supplements limit stiffness and joint pain in people with rheumatoid arthritis.

  6. ADHD: Omega-3 fatty acids also benefit children with Attention Deficit Hyperactivity Disorder, or ADHD, by enhancing their learning and comprehension.

Conclusion

Up-to-day research is evident that omega-3 fatty acids through diet or supplements, in combination with other treatments, show benefits over depression. Still, some clear-cut research is going on to portray the effects well and show whether they apply to all. Though omega-3 fatty acids have numerous advantages, kindly consult your physician before taking them, as they could modify other medical conditions and drugs.

Keynote from iCliniq:

Omega-3 fatty acids do not just help reduce depressive symptoms. Also, it helps to treat cancer, prevent stroke and cardiovascular diseases, and heal arthritis and asthma. So, these show the benefits of omega-3s in various ways. But, our body does not produce it on its own. We have to take it in the form of supplements or foods rich in omega-3s. If you are thinking of adding it to your diet as a supplement, discuss it with your physician to confirm that it is right for you.

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Frequently Asked Questions

It may take several weeks or even months of consistent omega-3 supplementation before noticeable improvements in depressive symptoms are observed. It is important to note that individual responses may vary, and the effectiveness of omega-3s in treating depression may depend on the severity of the depression, the general health of the individual, and other treatment approaches being used.
Preliminary research suggests that supplementation with EPA and DHA, two types of omega-3 fatty acids, may positively impact the associated symptoms of anxiety and depression. These fatty acids play a vital role in neurotransmitter function and inflammation regulation associated with brain processes, which are relevant to mental health. However, more research is needed to establish conclusive findings.
Omega-3 fatty acids can be considered as a potential natural antidepressant. While they are not classified as traditional antidepressant medications, studies have suggested that omega-3 supplementation, specifically with EPA and DHA, may have antidepressant effects. Omega-3 fatty acids play a role in various processes in the brain that are related to mood regulation and neurotransmitter function.
Omega-3 fatty acids have the potential to positively impact mood and contribute to happiness. Studies suggest that supplementation with EPA and DHA, two types of omega-3s, may have mood-enhancing effects. However, individual responses may vary, and happiness is influenced by multiple factors. While omega-3 fatty acids can support overall well-being, they may not guarantee happiness on their own.
No, omega-3 fatty acids should not replace antidepressant medications. They can be used as a complementary addition to prescribed treatment, but it is important to consult with a doctor before making any changes to the medication regimen as omega-3 fatty acids have the potential to interact with certain medications.
Yes, omega-3 fatty acids can benefit mental health. They play a role in brain function and have been associated with improved mental well-being. Incorporating omega-3s into one’s diet or through supplementation may support overall mental health. However, it is important to consult with a doctor for guidance regarding the dosage and duration of omega-3 fatty acid supplements.
Yes, omega-3 fatty acid deficiency has been associated with an increased risk of developing depression. Research suggests that a lack of omega-3s in the diet may contribute to the development or worsening of depressive symptoms. However, depression is a complex condition with various factors involved, and omega-3 deficiency is just one potential contributing factor. 
The appropriate dosage of omega-3 fatty acids for brain health depends on individual factors like age, overall health, and specific conditions. Typically, a daily intake of 250-500 milligrams of combined EPA and DHA is recommended for brain health benefits. However, it is important to consult with a doctor before starting any supplementation, since certain medications (Aspirin) may interact with omega-3 fatty acids. 
Omega-3 fatty acids are generally recommended to be taken daily, as they are considered essential for the body and need to be obtained through diet or supplementation. However, the specific dosage and duration of supplementation may vary depending on the specific requirement for the individual and general health conditions. 
Serotonin is a type of chemical messenger (neurotransmitter) found in the brain. Omega-3 fatty acids do not directly contribute to serotonin production. While they play a role in brain health, their impact on serotonin levels is indirect and not fully understood. Serotonin production is influenced by various factors, including diet and lifestyle.
Omega-3 fatty acids have shown potential for positively influencing dopamine levels in the brain. Studies indicate that omega-3 supplementation can increase dopamine levels and enhance the binding of dopamine receptors in specific brain regions. However, the precise mechanisms underlying this relationship are not understood, and more research is required to establish a definitive connection.
Omega-3 fatty acids are believed to be beneficial for mood due to their role in supporting brain health and function. Omega-3 fatty acids also have anti-inflammatory properties that can help reduce inflammation in the brain, which has been linked to mood disorders. Omega-3 fatty acids influence neurotransmitters like serotonin and dopamine, which play a crucial role in mood regulation.
Omega-3 fatty acids have been suggested as a potential aid in reducing brain fog (confusion, lack of focus). However, the effectiveness in alleviating brain fog may vary among individuals. Other factors such as stress management, sleep patterns, and overall lifestyle play a role in managing brain fog.
Fish oil, which is high in omega-3 fatty acids, has shown promise in promoting mental health by protecting the brain, enhancing brain function, and potentially aiding in the treatment of conditions like depression. However, further research is necessary to fully understand the extent of these benefits.
Few research studies have provided evidence to show that hair health can improve with omega- 3 fatty acids. Omega-3 fatty acids play a crucial role in maintaining overall skin health, including the scalp, which is important for promoting healthy hair growth. They help nourish hair follicles, improve hair strength and elasticity, and reduce scalp inflammation. 
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Dr. Vishal Anilkumar Gandhi from iCliniq
Dr. Vishal Anilkumar Gandhi

Psychiatry

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