Is Fish Oil Good for Breastfeeding? Benefits and Safety Tips

Q: Is fish oil good for breastfeeding?

Key Takeaway: Your body works hard to nourish your baby. Adding fish oil is an easy, evidence-based way to ensure you are both getting the essential fats you need for long-term wellness.

Posted on May 25, 2026

Is Fish Oil Good for Breastfeeding? Benefits and Safety Tips

Introduction
Understanding Omega-3 Fatty Acids
Is Fish Oil Good for Breastfeeding?
Benefits for Your Baby’s Development
Benefits for the Breastfeeding Parent
Choosing Between Fish Oil and Eating Fish
Algal Oil: The Vegan Alternative
How Much Fish Oil Should You Take?
Potential Side Effects and Considerations
Holistic Support for Your Lactation Journey
Practical Ways to Include Healthy Fats in Your Diet
Myths About Fish Oil and Breastfeeding
Listening to Your Body
Conclusion
FAQ

Introduction

As a new parent, your mind is likely filled with questions about what you eat and how it affects your little one. You want to give your baby the best possible start, and often, that leads to a deep dive into the world of supplements. One of the most common questions we hear is whether fish oil is good for breastfeeding and if it is worth adding to a busy postpartum routine.

At Milky Mama, we believe that providing your baby with high-quality nutrition should feel empowering, not overwhelming. If you want individualized support, our Certified Lactation Consultant Breastfeeding Help page is a helpful place to start. Understanding the role of essential fats can help you make informed choices for your own recovery and your baby’s growth.

Every drop counts, and ensuring those drops are packed with the nutrients your baby needs is a wonderful goal. We are here to help you navigate the evidence so you can feel confident in your nutritional choices. In this guide, we will look at how fish oil supports brain development, maternal mood, and overall wellness during the nursing journey.

Understanding Omega-3 Fatty Acids

Before we dive into the specific benefits of fish oil, it is helpful to understand what it actually is. Fish oil is a primary source of Omega-3 fatty acids. These are a group of polyunsaturated fats that are considered "essential." This means your body cannot produce them on its own. You must get them through the food you eat or through supplementation.

The two most critical types of Omega-3s found in fish oil are Docosahexaenoic Acid (DHA) and Eicosapentaenoic Acid (EPA). While both are important, they serve slightly different purposes in the body. DHA is a major structural component of the human brain, cerebral cortex, and retina. EPA is more closely associated with supporting the body's natural management of inflammation and cardiovascular health.

If you want a broader breastfeeding foundation alongside supplement guidance, our Breastfeeding 101 course is a helpful companion.

The Role of DHA

DHA is often the "star" of the show when it comes to infant development. During the third trimester of pregnancy and the first two years of life, a baby’s brain undergoes a massive growth spurt. This process requires a significant amount of DHA. When you are breastfeeding, your baby receives this essential fat directly through your milk.

The Role of EPA

EPA is equally vital for the breastfeeding parent. Postpartum recovery involves healing from birth and managing the physical demands of caring for a newborn. EPA helps support heart health and can assist the body in maintaining a healthy inflammatory response. For many parents, EPA is also a key factor in supporting mood stability during the hormonal shifts of the fourth trimester.

Key Takeaway: Omega-3s are essential fats that the body cannot make itself. DHA supports the baby's brain and eyes, while EPA supports the parent's physical and emotional recovery.

Is Fish Oil Good for Breastfeeding?

The short answer is yes, fish oil is generally considered very good for breastfeeding. Most health organizations, including the American College of Obstetricians and Gynecologists (ACOG), recommend that nursing parents consume adequate amounts of Omega-3s. Because the average American diet is often low in these specific fats, many lactation experts suggest that fish oil can be a helpful supplemental tool.

For a broader look at supply-building basics, our How to Build Breast Milk Supply: 7 Proven Tips for Moms guide offers a useful next read.

The primary reason to consider fish oil is its impact on the composition of your breast milk. Studies have shown that the level of DHA in a mother’s milk is directly related to her intake of Omega-3s. If you consume more fatty fish or take a high-quality fish oil supplement, the concentration of DHA in your milk increases. This ensures your baby is getting a steady supply of the building blocks they need for their developing nervous system.

How DHA Travels into Breast Milk

When you consume fish oil, the fats are broken down and enter your bloodstream. From there, they are transported to the mammary glands. This process is quite efficient. In fact, some studies show that DHA levels in breast milk can rise within hours of taking a supplement. However, long-term consistency is what really matters for maintaining steady levels in your milk supply.

What to Do Next: Boosting Your Intake

Aim for 2–3 servings of low-mercury fish per week.
Consult with your healthcare provider about a high-quality fish oil or algal oil supplement.
Read labels to ensure your supplement contains at least 200–300mg of DHA.
Monitor your body’s response to ensure the supplement sits well with your digestion.

Benefits for Your Baby’s Development

The benefits for the baby are the most common reason parents ask about fish oil. Since a baby’s brain is about 60% fat, the quality of fats they consume matters. DHA is a primary structural fat in the brain and the eyes, making it a non-negotiable nutrient for early growth.

Brain and Cognitive Function

Research has suggested that infants who receive higher levels of DHA through breast milk may show improved cognitive outcomes as they grow. This includes better hand-eye coordination, increased attention spans, and improved problem-solving skills in early childhood. While fish oil is not a "magic pill" for intelligence, it provides the raw materials necessary for the brain to wire itself correctly.

Visual Acuity and Eye Health

DHA is found in very high concentrations in the retina. Providing your baby with enough Omega-3s may help support the development of their vision. Some studies have found that infants with higher DHA intake have better visual acuity—the ability to see fine detail—compared to those with lower intakes.

Immune System Support

There is emerging evidence that fish oil may play a role in the development of a baby’s immune system. High levels of DHA in breast milk have been associated with higher levels of secretory IgA. This is an antibody that helps protect the baby's intestinal tract from pathogens. Some research also indicates that early exposure to Omega-3s might reduce the risk of developing food allergies or asthma later in life.

Support for Preterm Infants

For babies born prematurely, Omega-3s are even more critical. Preterm infants miss out on the significant "fat dump" that occurs during the third trimester of pregnancy. For these babies, maternal supplementation can be a vital way to help them catch up on brain and eye development. If you have a preemie, your medical team may recommend higher doses of DHA to support their unique needs.

Benefits for the Breastfeeding Parent

While we often focus on the baby, your wellness is just as important. Breastfeeding is a physically demanding job. It requires extra calories and specific nutrients to keep your body functioning at its best. Fish oil offers several benefits that are specific to the nursing parent.

Mood Support and Mental Health

The "baby blues" and postpartum depression are serious concerns for many new parents. Interestingly, research has shown a link between low levels of Omega-3s and an increased risk of mood disorders. During pregnancy and breastfeeding, your body prioritizes sending DHA to the baby. If your intake isn't high enough, your own stores can become depleted. Supplementing with fish oil may help support emotional well-being and mood stability during this sensitive time.

Managing Inflammation

The physical toll of birth and the repetitive motions of holding and feeding a baby can lead to joint pain or general inflammation. The EPA in fish oil is known for its anti-inflammatory properties. By supporting your body’s natural ability to manage inflammation, fish oil may help you feel more comfortable and physically resilient as you navigate the demands of early parenthood.

Heart and Skin Health

Omega-3s are well-known for supporting cardiovascular health. They help maintain healthy cholesterol levels and support the lining of the blood vessels. Additionally, many parents find that fish oil helps with "postpartum skin" issues. The healthy fats help maintain the skin’s moisture barrier, which can be helpful if you are dealing with dryness due to hormonal changes.

Choosing Between Fish Oil and Eating Fish

When considering fish oil, you might wonder if you should just eat more fish instead of taking a pill. Both options have pros and cons.

If you want meal ideas that fit a breastfeeding routine, our What Should I Eat While Breastfeeding? guide is a helpful companion.

The Benefits of Whole Fish

Eating fish like salmon, sardines, and trout provides not just Omega-3s, but also high-quality protein, Vitamin D, and selenium. Most health experts prefer "food first" because nutrients often work together more effectively in their natural form. The FDA and EPA recommend that breastfeeding parents eat 8 to 12 ounces (about 2 to 3 servings) of low-mercury fish per week.

The Problem with Mercury

The biggest concern with eating fish is mercury. Mercury is a heavy metal that can build up in the body and potentially harm a baby’s developing nervous system. To stay safe, you should avoid "high-mercury" fish. These are typically large, predatory fish that live a long time.

Fish to avoid while breastfeeding:

Shark
Swordfish
King Mackerel
Tilefish
Bigeye Tuna
Marlin
Orange Roughy

Safe, low-mercury options:

Salmon
Sardines
Trout
Anchovies
Atlantic Mackerel
Herring

Why Supplements Are Often Preferred

For many busy parents, cooking fish three times a week is a tall order. Furthermore, many people simply do not enjoy the taste of oily fish. This is where our lactation supplements collection can be helpful. High-quality fish oil supplements are purified to remove environmental contaminants like mercury and PCBs. This allows you to get a concentrated dose of DHA and EPA without the risk of heavy metal exposure.

Algal Oil: The Vegan Alternative

If you follow a plant-based diet or have a fish allergy, you can still get the benefits of Omega-3s. Algal oil is derived from the microalgae that fish eat to get their Omega-3s. It is a "primary source" of DHA.

Algal oil is often considered a "cleaner" option because it is grown in controlled environments, far away from ocean pollutants. It is highly effective at raising DHA levels in breast milk. While it typically contains less EPA than fish oil, it is an excellent choice for parents who want a sustainable and vegan-friendly way to support their baby’s brain development.

How Much Fish Oil Should You Take?

Dosage is an important part of the conversation. Most international organizations recommend a minimum of 200mg to 300mg of DHA per day for lactating parents. Some clinical studies have used higher doses, up to 1,000mg (1 gram) of combined DHA and EPA, to see more significant changes in breast milk composition.

It is important to remember that more is not always better. The FDA suggests that consuming up to 3 grams (3,000mg) of fish oil per day is "generally recognized as safe" (GRAS). However, very high doses can sometimes interfere with blood clotting. Always talk to your doctor or a certified lactation consultant before starting a new supplement to find the dose that is right for you.

Key Takeaway: Consistency is more important than a high dose. Taking a daily supplement of 200-300mg of DHA is usually sufficient to support both you and your baby.

Potential Side Effects and Considerations

While fish oil is very safe for most people, there are a few things to keep in mind. The most common complaint is "fishy burps" or a lingering aftertaste. This happens when the fish oil begins to break down in the stomach.

Tips to Avoid "Fishy Burps"

Freeze your capsules: This slows down the digestion of the pill so it opens further down in your digestive tract.
Take it with food: Taking fish oil with a meal helps it mix with other fats and digest more smoothly.
Choose high-quality brands: Fresh, high-quality fish oil shouldn't smell or taste excessively "fishy." If it does, it might be rancid.
Look for "Enteric Coated": These capsules are designed to bypass the stomach and dissolve in the small intestine.

Quality and Purity

The supplement industry is not strictly regulated by the FDA. This means the quality of fish oil can vary wildly between brands. When shopping for a supplement, look for "Third-Party Testing." This means an independent lab has verified that the product contains what the label says and is free from harmful levels of mercury, lead, and other toxins. Look for seals from organizations like NSF, USP, or IFOS (International Fish Oil Standards).

Holistic Support for Your Lactation Journey

At Milky Mama, we know that nutrition is just one piece of the puzzle.

Supporting your milk supply and your overall health requires a holistic approach. While fish oil provides essential building blocks, you might also find support through our range of herbal supplements.

For example, Pumping Queen™ is designed to support milk production and flow.

Another option is Lady Leche™ if you prefer a liquid herbal formula.

We also offer hydration support through Pumpin' Punch™.

If you want another flavor option, Milky Melon™ is a refreshing choice.

If you prefer a snack-based option, our lactation snacks collection can fit into a busy routine.

Remember, breastfeeding is a journey that looks different for everyone. Whether you are exclusively nursing, pumping, or doing a mix of both, your well-being matters. Taking care of your nutritional needs with supplements like fish oil is a beautiful way to honor the hard work your body is doing.

This product is not intended to diagnose, treat, cure, or prevent any disease. Consult with your healthcare provider for medical advice.

Practical Ways to Include Healthy Fats in Your Diet

If you want to boost your Omega-3s through food while also taking a supplement, there are many easy ways to do it. You don't have to eat a whole filet of salmon every day to make a difference.

Small Dietary Changes

Add flaxseeds or chia seeds: While these provide ALA (a different type of Omega-3), they still contribute to your overall healthy fat intake.
Switch to Omega-3 enriched eggs: Some chickens are fed a diet rich in greens and insects (or flax), which results in eggs with higher DHA content.
Snack on walnuts: These are a great source of plant-based fats and make an easy, one-handed snack for nursing parents.
Use sardines as a topper: Sardines are very low in mercury and high in calcium. Try them on avocado toast for a nutrient-dense breakfast.

Myths About Fish Oil and Breastfeeding

There is a lot of information online, and not all of it is accurate. Let’s clear up a few common myths.

Myth 1: Fish oil will make my breast milk taste like fish. Actually, research shows that maternal fish oil consumption does not change the odor or flavor of breast milk. Your baby likely won't notice a difference in the taste of your milk at all.

Myth 2: I only need fish oil if I have a low milk supply. Fish oil is not primarily used to increase the quantity of milk; it is used to improve the quality of the milk. Even if you have a perfect supply, your baby still benefits from the DHA and EPA in the milk.

Myth 3: Flaxseed oil is just as good as fish oil. Flaxseed oil contains Alpha-Linolenic Acid (ALA). While the body can convert ALA into DHA and EPA, the conversion rate is extremely low (often less than 5%). To get the brain-building benefits for your baby, a direct source of DHA, like fish or algal oil, is much more effective.

Listening to Your Body

As you introduce fish oil into your life, pay attention to how you feel. Some parents find that their skin clears up or they have a bit more mental clarity. Others might find that a certain brand doesn't sit well with their stomach. It is okay to try a few different options until you find what works for you.

You are doing an amazing job navigating the complexities of parenthood. Every choice you make, from the supplements you take to the way you cuddle your baby, is a testament to your love and dedication. We are honored to be a part of your village.

Conclusion

Is fish oil good for breastfeeding? The evidence points to a resounding yes. By providing essential DHA for your baby’s brain and eye development and EPA for your own emotional and physical recovery, fish oil is a powerhouse addition to a nursing parent’s routine. Whether you choose to eat low-mercury fish or opt for a purified supplement, increasing your Omega-3 intake is a proactive step toward a healthy breastfeeding experience.

DHA supports infant brain, eye, and immune system growth.
EPA may help the parent manage postpartum mood and inflammation.
High-quality, third-party tested supplements are a safe way to avoid mercury.
Consistency is key to maintaining high levels of these fats in your breast milk.

Key Takeaway: Your body works hard to nourish your baby. Adding fish oil is an easy, evidence-based way to ensure you are both getting the essential fats you need for long-term wellness.

For more support on your breastfeeding journey, explore our educational resources and lactation-support products at Milky Mama. We are here to provide the tools and encouragement you need to reach your feeding goals, one drop at a time.

FAQ

Does fish oil help increase milk supply?

Fish oil is primarily used to improve the nutritional quality of breast milk, specifically the levels of DHA and EPA. While it is excellent for brain development and maternal health, it is not considered a primary galactagogue (a substance that increases milk supply). For supply concerns, we often recommend frequent nursing or pumping and herbal supports like our Pumping Queen™ supplement. You can also connect with other parents in the Official Milky Mama Lactation Support Group on Facebook.

Can I take fish oil if I am allergic to shellfish?

Most people with a shellfish allergy can safely take fish oil, as it is derived from finned fish (like anchovies or sardines) rather than crustaceans. However, there is always a risk of cross-contamination during processing. If you have a severe allergy, it is best to consult your allergist or opt for a 100% plant-based algal oil supplement instead.

When is the best time of day to take fish oil?

The best time to take fish oil is whenever you can be consistent, but taking it with a meal containing other fats is ideal. This helps improve the absorption of the Omega-3s and significantly reduces the chance of experiencing "fishy burps" or an upset stomach. Many parents find that taking it with breakfast or dinner works best for their routine.

Is it safe to take fish oil and a prenatal vitamin at the same time?

Yes, it is generally safe and often recommended to take both. Many prenatal vitamins do not contain enough DHA to meet the increased needs of a breastfeeding parent. Just be sure to check the labels of both to ensure you aren't exceeding the recommended daily intake of any specific fat-soluble vitamins that might be added to the fish oil, like Vitamin D.