Is Fish Good for Breastfeeding Mothers? Essential Tips for You

Posted on May 25, 2026

Is Fish Good for Breastfeeding Mothers? A Guide to Safe Seafood

Introduction
The Nutritional Power of Fish for Breastfeeding
Understanding the Mercury Concern
The Three Categories of Seafood
Serving Sizes and Frequency
Special Considerations: Sushi and Local Catches
Supporting Your Supply Naturally
What if You Don't Like Fish?
Practical Tips for Cooking Fish
Balancing Your Breastfeeding Diet
Conclusion
FAQ

Introduction

Deciding what to eat while nursing can feel like a full-time job. After nine months of avoiding certain deli meats, soft cheeses, and raw fish, many new parents wonder if those restrictions carry over into the postpartum period. You want to nourish your body and provide the best for your baby, but the conflicting advice about mercury and contaminants can be overwhelming. It is common to feel a little anxious about how your diet impacts your milk.

At Milky Mama, we believe that nutrition should feel like support, not a source of stress. We are here to help you navigate these choices with confidence and clinical expertise. Fish can be an incredible addition to your diet, but there are a few important rules to keep in mind to keep things safe for your little one.

This post covers why fish is beneficial, which types are safest, and how much you should aim to eat each week. Our goal is to help you enjoy your meals while supporting your baby's growth and your own wellness. Understanding how to balance the benefits of seafood with the risks of mercury is the key to a healthy breastfeeding diet.

The Nutritional Power of Fish for Breastfeeding

When people ask if fish is good for breastfeeding mothers, the answer is a resounding yes—with a few caveats. Fish is a nutritional powerhouse that provides several key nutrients that are hard to find in such high concentrations elsewhere. These nutrients don't just help your baby; they support your recovery and energy levels too.

Omega-3 Fatty Acids (DHA and EPA)

One of the biggest reasons to include fish in your diet is the presence of omega-3 fatty acids, specifically DHA (docosahexaenoic acid) and EPA (eicosapentaenoic acid). DHA is an essential fat that plays a massive role in the development of your baby’s brain, nervous system, and eyes.

While your body can store some DHA, the amount in your breast milk is directly influenced by what you eat. When you consume fish rich in these fats, you are passing that brain-building fuel directly to your baby. For the mother, omega-3s are also linked to heart health and may help support a stable mood during the postpartum period. For more information, explore this guide to omega-3 fish oil for breastfeeding.

High-Quality Protein

Postpartum recovery requires a lot of energy and repair. Fish is an excellent source of lean protein, which helps repair tissues and keeps you feeling full longer. Unlike some heavy meats, fish is often easier on the digestive system, which can be a relief during those early weeks of healing.

Iodine and Choline

Fish is also a natural source of iodine and choline. These are two nutrients that many people don't get enough of, yet the demand for them increases during lactation. Iodine supports the baby’s thyroid function and brain development. Choline is another "brain food" that supports the development of the baby's spinal cord and cognitive function.

Vitamin D and B12

Many varieties of fish, especially fatty fish like salmon and sardines, are high in Vitamin D and B12. Vitamin D is essential for bone health and immune function. Since many infants are at risk for low Vitamin D levels, having a mother who maintains a nutrient-dense diet is a great foundational step, though most babies still require a separate Vitamin D supplement as recommended by pediatricians.

Key Takeaway: Fish provides essential "brain fats" like DHA and vital minerals like iodine that are critical for your baby's cognitive and physical development.

Understanding the Mercury Concern

While fish is nutrient-dense, the reason many moms hesitate is mercury. Mercury is a metal found naturally in the environment, but it also enters our waterways through industrial pollution. Once it is in the water, bacteria convert it into methylmercury.

Fish absorb this mercury from the water they swim in and the food they eat. It binds to the proteins in the fish’s muscle tissue. This is why you cannot "cook out" mercury or cut it away by removing the fat or skin. For a broader overview, read this seafood safety guide for breastfeeding.

Why Mercury Matters for Your Baby

When you eat fish containing mercury, a small amount can pass into your breast milk. Because a baby's brain and nervous system are still rapidly developing, they are more sensitive to the effects of mercury than adults are. High levels of exposure could potentially interfere with their cognitive growth.

The Good News About Breastfeeding

It is important to remember that the levels of mercury found in breast milk are generally much lower than the levels found in a mother's blood during pregnancy. Research shows that for the vast majority of parents, the benefits of the nutrients in fish (like those omega-3s) far outweigh the risks of low-level mercury exposure. By choosing the right fish, you can get all the benefits without the worry.

The Three Categories of Seafood

To make things easier for breastfeeding families, the FDA and EPA have categorized fish into three groups: Best Choices, Good Choices, and Choices to Avoid. This helps you quickly identify what should be on your plate.

Best Choices (Eat 2–3 servings a week)

These fish are low in mercury and high in beneficial nutrients. You can safely enjoy 8 to 12 ounces of these per week.

Salmon: A gold standard for DHA and low mercury.
Sardines: Packed with calcium and omega-3s.
Pollock: A mild fish often used in fish sticks or fish tacos.
Shrimp and Scallops: Low mercury and high protein.
Canned Light Tuna: Note the "light" label, which usually refers to skipjack tuna.
Tilapia and Catfish: Mild, accessible, and safe.
Trout (Freshwater): A great source of healthy fats.

Good Choices (Eat 1 serving a week)

These fish have slightly higher mercury levels. If you eat one of these, you should skip other fish for the rest of the week.

Albacore (White) Tuna: This has more mercury than canned light tuna.
Halibut: A delicious firm fish but should be limited.
Snapper and Mahi-mahi: Common in restaurants but higher on the mercury scale.
Grouper: Best kept as an occasional treat.

Choices to Avoid

These fish are long-lived predators. Because they are at the top of the food chain and live a long time, they accumulate the highest levels of mercury.

Shark
Swordfish
King Mackerel
Tilefish (from the Gulf of Mexico)
Bigeye Tuna
Marlin
Orange Roughy

What to Do Next

Aim for 2 portions of "Best Choices" fish each week.
Choose wild-caught salmon when possible for higher nutrient density.
If you love tuna, stick to "canned light" skipjack most of the time.
Keep a list of the "Avoid" fish on your phone for quick reference when grocery shopping or dining out.

Serving Sizes and Frequency

Knowing which fish to eat is half the battle; the other half is knowing how much. A standard serving of fish for an adult is about 4 ounces. A simple way to measure this is by looking at the palm of your hand. A piece of fish the size and thickness of your palm is roughly one serving.

For breastfeeding mothers, the general recommendation is:

8 to 12 ounces per week of a variety of fish from the "Best Choices" list.
This usually breaks down to 2 to 3 servings per week.

If you choose a fish from the "Good Choices" list, limit yourself to just that one 4-ounce serving for the week and avoid other fish until the following week. This balance ensures you are getting a steady supply of DHA without letting mercury levels build up in your system.

Special Considerations: Sushi and Local Catches

Many parents want to know if they can finally return to the sushi bar once the baby is born. During pregnancy, raw fish is discouraged primarily due to the risk of Listeria or other parasites that could harm the fetus.

While breastfeeding, the rules relax slightly. The risk of a foodborne illness from raw fish generally affects the mother rather than the baby. A parasite or bout of food poisoning typically doesn't pass through breast milk. However, getting sick while caring for a newborn is incredibly taxing and can lead to dehydration, which may temporarily impact your milk supply. If you do enjoy sushi, ensure it comes from a reputable, high-quality source. This sushi safety guide for breastfeeding offers additional guidance.

Locally Caught Fish

If you or your friends catch fish in local lakes, rivers, or coastal areas, you need to be a bit more careful. These waters may have specific advisories due to local runoff or chemical pollutants like PCBs (polychlorinated biphenyls).

Check your local or state government websites for fish advisories before eating what you catch. If no advisory is available, the standard recommendation is to limit yourself to one 6-ounce serving of that local fish per week and eat no other fish during that time.

Supporting Your Supply Naturally

Eating a balanced diet with healthy fats from fish is a great foundation for breastfeeding. However, we know that many moms need a little extra support to maintain their supply or feel their best while navigating the demands of a newborn.

Sometimes, despite your best efforts with diet, you might feel like your supply needs a boost. Our Pumping Queen™ herbal supplement is a popular choice for moms looking to support their milk production. It contains organic goat's rue and moringa, which are known for their lactation-supporting properties.

Additionally, staying hydrated is crucial when you are consuming more protein and healthy fats. We recommend keeping a bottle of water or a glass of our Milky Melon™ drink mix nearby. It provides hydration along with ingredients designed to support your milk flow, making it easier to meet your daily goals while you focus on your baby.

Note: This product is not intended to diagnose, treat, cure, or prevent any disease. Consult with your healthcare provider for medical advice before starting any new supplement.

What if You Don't Like Fish?

We realize that not everyone enjoys the taste of fish, or you may follow a vegetarian or vegan lifestyle. If you aren't eating fish, you may need to look for other ways to get those critical omega-3 fatty acids.

Plant-Based Omega-3s

You can find ALA (alpha-linolenic acid), a type of omega-3, in foods like:

Flaxseeds and flaxseed oil
Chia seeds
Walnuts
Hemp seeds

However, the body isn't very efficient at converting ALA into the DHA and EPA that your baby needs. If you don't eat fish, many lactation consultants recommend an algae-based DHA supplement. Algae is where the fish get their omega-3s in the first place, so it is a direct, vegan-friendly source of brain-building fats.

Other Nutrient Sources

If you are skipping fish, make sure you are getting enough iodine and B12 from other sources. Iodized salt, dairy products, and eggs are good sources of iodine. For B12, you may need a supplement or fortified foods like nutritional yeast if you follow a strictly plant-based diet.

Practical Tips for Cooking Fish

If you are new to cooking fish or worried about the "fishy" smell, there are ways to make it more palatable and safe.

Remove Skin and Fat for Other Pollutants: While you can't remove mercury, you can reduce your exposure to other chemicals like PCBs by trimming the skin and the dark fatty tissue along the back and belly of the fish.
Broil or Bake: These methods allow excess fat, which may contain some contaminants, to drain away.
Use Fresh Citrus: Lemon or lime juice can neutralize the smell and add a bright flavor that pairs well with the healthy fats in salmon or trout.
Try Canned Varieties: Canned salmon or sardines are often "pressure-cooked" in the can, making the tiny bones soft and edible. These bones are a fantastic source of calcium for breastfeeding moms.

Key Takeaway: Preparing fish correctly can help reduce exposure to some contaminants, though mercury remains in the muscle. Stick to the "Best Choices" list for the highest safety margin.

Balancing Your Breastfeeding Diet

Breastfeeding is a journey that requires a lot of your body. It is not just about the milk; it is about keeping you healthy, too. While fish is a great addition, it is just one piece of the puzzle. A diet rich in colorful vegetables, whole grains, and plenty of fluids will serve you well.

We want you to feel empowered to make these choices. If you love salmon, enjoy it! If the thought of sardines makes you cringe, don't force it. There are many ways to reach your nutritional goals. Every drop of milk you produce is a gift to your baby, and the fact that you are researching the best foods to eat shows what an amazing job you are doing.

Remember that your well-being matters just as much as the baby's. If you are feeling depleted, take a look at your overall intake. Are you getting enough calories? Are you staying hydrated? Sometimes a simple adjustment, like adding a few servings of low-mercury fish or a nourishing snack, can make a world of difference in how you feel.

Conclusion

Is fish good for breastfeeding mothers? Absolutely. It provides the DHA, protein, and minerals necessary for your baby's brain development and your own recovery. By choosing fish from the "Best Choices" list—like salmon, pollock, and shrimp—and limiting high-mercury predators like swordfish, you can safely enjoy the benefits of seafood.

Eat 8–12 ounces of low-mercury fish per week.
Prioritize "Best Choices" like salmon and sardines for the most DHA.
Check local advisories if you are eating fish caught by friends or family.
Focus on variety to get a wide range of nutrients.

"Your breasts were literally created to feed your baby, and your body is incredibly efficient at pullings the best nutrients from your diet to create that liquid gold. Trust the process and nourish yourself well."

If you need a little more support on your breastfeeding journey, we are here for you. Whether it is through our educational resources or our lactation-supporting snacks, Team Milky Mama is dedicated to helping you reach your feeding goals with confidence.

FAQ

Can I eat tuna while breastfeeding?

Yes, you can eat tuna, but the type matters. Canned light tuna, usually skipjack, is a "Best Choice" and can be eaten 2–3 times a week. Albacore, or white, tuna and yellowfin tuna have more mercury and should be limited to one 4-ounce serving per week with no other fish consumed that week.

Does cooking fish remove the mercury?

No, cooking does not remove mercury because the metal is bound to the protein in the fish's muscle tissue. However, cleaning the fish and removing the skin and fat can help reduce exposure to other environmental contaminants like PCBs. To minimize mercury, the best strategy is to choose smaller fish that are lower on the food chain.

Is it safe to eat sushi while breastfeeding?

For most healthy adults, eating sushi from a reputable source is considered safe while breastfeeding. While the risk of foodborne illness exists with raw fish, these infections generally do not pass into breast milk. However, you should still stick to low-mercury fish options when choosing your sushi rolls to avoid excessive mercury exposure.

What if I accidentally ate a high-mercury fish?

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