Is Seafood Good for Breastfeeding? A Nutritional Guide

Posted on May 31, 2026

Introduction
The Nutritional Powerhouse: Why Seafood Matters
How Seafood Benefits Your Baby
Benefits for the Breastfeeding Parent
Understanding the Mercury Question
Safe Seafood Choices: The FDA Categories
Managing Portions and Serving Sizes
Raw Seafood and Sushi Concerns
Tips for Preparation and Safety
What If You Don't Like Seafood?
Signs of Sensitivity in Your Baby
Seafood as Part of a Balanced Lactation Diet
Action Plan for Seafood Consumption
FAQ
Conclusion

Introduction

Deciding what to eat while you are nursing can feel like a full-time job. You want to nourish your body and provide the best for your little one, but conflicting advice often makes certain foods feel off-limits. One of the most common questions we hear is whether seafood is a safe and beneficial choice during this season. You might be craving a salmon fillet or wondering if your favorite shrimp taco is okay for the baby.

At Milky Mama, we believe that nutrition should be a source of empowerment, not stress. If you want more individualized support, our Certified Lactation Consultant Breastfeeding Help page is a great place to start. Our founder, Krystal Duhaney, RN, BSN, IBCLC, built this community to provide evidence-based guidance that simplifies your breastfeeding journey. This article will explore the safety, benefits, and recommended portions of seafood to help you eat with confidence.

Seafood is not just safe for most breastfeeding parents; it is actually one of the most nutrient-dense food groups you can choose to support your recovery and your baby’s development.

The Nutritional Powerhouse: Why Seafood Matters

Seafood is often referred to as a "superfood" for lactation, and for good reason. It provides a unique combination of high-quality protein, healthy fats, and essential minerals that are difficult to find in such high concentrations elsewhere. When you are breastfeeding, your body’s nutritional demands increase significantly. You are quite literally filtering your own nutrient stores to create the perfect milk for your baby.

If you want a broader meal-planning companion, our What Should I Eat While Breastfeeding? guide is a useful next read.

Omega-3 Fatty Acids (DHA and EPA)

One of the primary reasons experts recommend seafood is for its high levels of omega-3 fatty acids, specifically docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). These are long-chain polyunsaturated fats that the human body cannot produce efficiently on its own.

DHA is a major structural component of the human brain and retina. During the first two years of life, a baby's brain grows at a rapid pace, and they rely entirely on the DHA provided in breast milk to support this development. Studies have shown that mothers who consume adequate amounts of DHA often have higher concentrations of it in their milk, which may support better cognitive outcomes and visual acuity for their infants.

Iodine and Choline

Breastfeeding parents have a higher requirement for iodine and choline than almost any other group. Iodine is essential for healthy thyroid function and plays a critical role in your baby’s neurological development. Seafood, particularly white fish and shellfish, is one of the few natural dietary sources of iodine.

Choline is another heavy hitter for brain health. It supports the development of the baby’s spinal cord and neurotransmitter function. While eggs are a well-known source, many types of fish also contribute to your daily choline goals.

High-Quality Protein and Micronutrients

Postpartum recovery requires plenty of protein to repair tissues and support the immune system. Seafood provides lean, easily digestible protein. It is also packed with:

Vitamin B12: Vital for nervous system health and energy levels.
Vitamin D: Essential for bone health and immune function.
Iron: Helps prevent postpartum anemia and supports energy.
Zinc and Selenium: Key minerals for immune support and skin health.

Key Takeaway: Seafood provides essential nutrients like DHA, iodine, and choline that are critical for your baby's brain development and your own postpartum recovery.

How Seafood Benefits Your Baby

Your breast milk is dynamic, changing its composition to meet your baby's needs. However, the levels of certain nutrients in your milk, like DHA and iodine, are directly influenced by what you eat. By including seafood in your diet, you are giving your baby a direct nutritional boost.

For a fuller look at nutritional variety, our What Foods Help Your Milk Supply? guide can help.

Brain and Eye Development

The DHA found in fish is a building block for the central nervous system. When you consume low-mercury fish, the DHA levels in your milk rise. This fat is then absorbed by the baby and used to build brain tissue and the retina of the eye. Some research suggests that adequate omega-3 intake during lactation may be linked to better sleep patterns and attention spans in infants as they grow.

Immune System Support

Fish contains selenium and zinc, both of which are vital for a healthy immune response. As your baby is building their own immune system, receiving these minerals through breast milk can be incredibly supportive. Furthermore, the healthy fats in seafood have anti-inflammatory properties that benefit the entire family.

Cognitive Development

Current scientific evidence suggests that moderate fish consumption during pregnancy and breastfeeding is associated with improved cognitive development in children. This includes better performance on tests of language and communication in early childhood. Every drop counts, and providing these high-quality nutrients through your milk is a wonderful way to support your baby’s potential.

Benefits for the Breastfeeding Parent

We often focus so much on the baby that we forget about the person doing the hard work of breastfeeding! You deserve to feel your best, and your diet plays a huge role in that.

Heart Health

The omega-3s in seafood aren't just for the baby; they are excellent for your heart health too. They can help lower blood pressure, reduce triglycerides, and decrease inflammation. After the physical toll of pregnancy and birth, supporting your cardiovascular system is a smart move.

Mood Regulation

Postpartum mood disorders are a significant concern for many new parents. While many factors contribute to postpartum depression and anxiety, some studies suggest that a diet rich in omega-3 fatty acids may help support emotional well-being. These fats play a role in how the brain processes serotonin and dopamine, the "feel-good" chemicals.

Energy and Recovery

The protein in seafood helps stabilize blood sugar levels, preventing the "crashes" that can happen when you're exhausted and relying on quick snacks. Staying nourished with high-quality protein can help you feel more stable throughout the day as you navigate the demands of a newborn.

Understanding the Mercury Question

The main reason people hesitate to eat seafood while breastfeeding is the concern over mercury. Mercury is a metal found naturally in the environment, but human activity has increased its levels in our oceans and waterways.

When fish swim in mercury-contaminated water, they absorb a form called methylmercury. This substance binds to the protein in the fish's muscles. Some mercury can pass through breast milk to the baby, and in high amounts, it can interfere with the development of the baby's brain and nervous system.

Bioaccumulation: Why Some Fish Have More Mercury

Mercury levels increase as you move up the food chain. Small fish eat plankton, and larger fish eat the small fish. The mercury stays in their systems, so the older and larger the fish, the more mercury it likely contains. This process is called bioaccumulation. This is why it is important to choose smaller, shorter-lived fish rather than large predatory fish.

Does Cooking Remove Mercury?

It is a common myth that cleaning or cooking fish can remove mercury. Unfortunately, because methylmercury is bound to the meat of the fish, it cannot be grilled, steamed, or cut away. However, removing the skin and fat from fish caught in local waters can help reduce exposure to other pollutants, like PCBs, which tend to store in fatty tissues.

What to do next:

Identify the fish you eat most often and check their mercury category.

Switch high-mercury options for safer alternatives like salmon or trout.

Focus on variety to ensure a broad spectrum of nutrients.

Safe Seafood Choices: The FDA Categories

To make things easier, the FDA and EPA have categorized seafood into three groups for breastfeeding and pregnant parents. Following these guidelines allows you to get the benefits of fish while keeping mercury exposure very low.

The "Best Choices" Category

You can safely eat 2 to 3 servings of these per week. A serving is about 4 ounces (roughly the size of the palm of your hand).

Salmon: Excellent for DHA and Vitamin D.
Shrimp: High in protein and low in calories.
Sardines: Packed with calcium and omega-3s.
Tilapia: A mild, accessible white fish.
Cod and Haddock: Great for iodine.
Canned Light Tuna: Note that "light" tuna is lower in mercury than "albacore" or "white" tuna.
Scallops and Clams: High in minerals like iron and zinc.

The "Good Choices" Category

You should limit these to 1 serving per week and eat no other fish that week.

Halibut: A delicious, meaty fish but slightly higher in mercury.
Mahi Mahi: Very popular but falls in the middle range for mercury.
Snapper: Often used in coastal cooking.
White (Albacore) Tuna: Canned or fresh albacore has about three times more mercury than canned light tuna.

The "Choices to Avoid" Category

These are large, predatory fish that should be avoided by breastfeeding parents and young children.

Swordfish: Very high mercury levels.
Shark: Long-lived predator.
King Mackerel: Not to be confused with Atlantic mackerel (which is a "Best Choice").
Tilefish: Specifically from the Gulf of Mexico.
Bigeye Tuna: Often found in high-end sushi.

Managing Portions and Serving Sizes

How much is enough? The general recommendation for breastfeeding parents is to consume between 8 and 12 ounces of low-mercury seafood per week.

If you are a visual learner, think of a 4-ounce serving as being roughly the size and thickness of a deck of cards or the palm of your hand. If you eat two to three meals containing fish each week, you are likely hitting the "sweet spot" for nutritional benefits.

If you happen to eat a "Choice to Avoid" fish or have a very large serving of tuna one week, don't panic. One meal is unlikely to cause harm. Simply limit your seafood intake the following week to allow your body time to process and clear the mercury naturally.

Raw Seafood and Sushi Concerns

During pregnancy, many parents are told to avoid raw sushi due to the risk of Listeria. While breastfeeding, the rules are slightly different. Listeria and other foodborne illnesses are generally not passed through breast milk to the baby.

However, getting a severe case of food poisoning while caring for a newborn is an experience most parents want to avoid! It can lead to dehydration, which can temporarily impact your milk supply. If you want a closer look at hydration and supply, our Does Drinking Water Help Breast Milk Supply? guide is a helpful companion.

Keep in mind that many sushi favorites, like Spicy Tuna, are made with Ahi or Bigeye tuna, which are higher in mercury. Opt for salmon rolls, shrimp tempura, or eel (unagi) to stay in the low-mercury "Best Choices" zone.

Tips for Preparation and Safety

To get the most out of your seafood meals, keep these safety and preparation tips in mind:

Cook to Temp: For most fish, the internal temperature should reach 145°F. The flesh should be opaque and flake easily with a fork.
Local Catches: If you or a friend catch fish in local lakes or rivers, check for local fish advisories. Some local waters have high levels of chemicals that aren't present in commercial seafood. If no advisory is available, limit yourself to 1 serving (4 ounces) of that fish per week and eat no other fish.
Freshness Matters: Seafood should never smell "fishy" in a bad way; it should smell like the ocean. Buy from busy markets where the stock rotates quickly.
Pairing for Absorption: Eat your fish with a source of Vitamin C (like a squeeze of lemon or a side of bell peppers) to help your body absorb the iron found in the seafood.

What If You Don't Like Seafood?

If the thought of eating fish makes you feel nauseous, or if you follow a vegan or vegetarian diet, you can still get the nutrients your baby needs. You may need to be more intentional about your intake.

For Omega-3s, look for:

Algae-based DHA supplements (this is where the fish get their DHA from!).
Chia seeds, flaxseeds, and walnuts (these provide ALA, which the body converts to DHA in small amounts).

For Iodine and Choline, look for:

Iodized salt and seaweeds like nori.
Eggs, beans, and cruciferous vegetables.

If you're concerned about your nutrient intake, we always recommend speaking with a healthcare provider or an IBCLC. If you want a more structured breastfeeding foundation, our Breastfeeding 101 course is a helpful next step. You can also supplement your diet with nourishing treats. At Milky Mama, our Lactation LeMOOnade™ provides hydration and supportive ingredients that fit perfectly into a healthy breastfeeding diet. While they don't replace the unique fats in fish, they help support your overall wellness and milk production.

Signs of Sensitivity in Your Baby

While seafood is a common allergen, it is relatively rare for a baby to react to the proteins passed through breast milk. However, it is always good to be observant when introducing new foods into your diet.

Watch for these signs in your baby:

Excessive fussiness or inconsolable crying after a feeding.
Skin rashes, hives, or sudden eczema.
Significant digestive distress, such as green, mucousy stools or frequent vomiting (more than just a typical "spit-up").
Respiratory issues like wheezing.

If you suspect a sensitivity, keep a food log to track what you eat and how your baby reacts. This can be invaluable information for your pediatrician or a lactation consultant.

Seafood as Part of a Balanced Lactation Diet

Eating for two (or more!) doesn't have to be complicated. A balanced diet that includes a variety of whole foods is the best way to ensure you and your baby thrive. Seafood fits beautifully into a meal plan that also includes:

Whole Grains: Oats, brown rice, and quinoa for lasting energy.
Colorful Vegetables: For antioxidants and fiber.
Hydration: Water and lactation-friendly drinks to keep your volume up.
Healthy Snacks: Our Emergency Lactation Brownies are a favorite for a quick, supply-supporting treat.

Breastfeeding is natural, but it doesn't always come naturally. If you're feeling overwhelmed by dietary choices or struggling with supply, remember that you are doing an amazing job. Every drop of milk you provide contains the perfect balance of what your baby needs at that exact moment.

Action Plan for Seafood Consumption

To make seafood a stress-free part of your week, follow these simple steps:

Aim for 2 servings a week: Pick two days (like Tuesday and Friday) to be "fish nights."
Stock the staples: Keep canned light tuna or frozen salmon fillets on hand for quick meals.
Check the labels: Ensure your tuna is "light" rather than "white" for more frequent consumption.
Go for the "Best Choices": Stick primarily to salmon, shrimp, tilapia, and sardines.
Stay hydrated: Always drink a glass of water or a Milky Mama beverage with your meal to support digestion.

"Breasts were literally created to feed human babies, and your body is incredibly efficient at turning your nutrition into liquid gold for your little one."

FAQ

Can I eat sushi while breastfeeding?

Yes, it is generally safe to eat sushi while breastfeeding. Unlike during pregnancy, the risk of foodborne illness like Listeria is primarily a concern for your own health rather than the baby's, as these bacteria do not pass into breast milk. However, you should still choose low-mercury fish like salmon or cooked shrimp and ensure the sushi is from a reputable source to avoid getting sick yourself.

Which fish should I completely avoid while nursing?

You should avoid fish that are high in mercury, as this metal can pass through breast milk and potentially affect your baby's developing nervous system. The main fish to avoid are swordfish, shark, king mackerel, tilefish from the Gulf of Mexico, orange roughy, and bigeye tuna. Choosing smaller fish like sardines or salmon is a much safer way to get your omega-3s.

How much tuna can I safely eat each week?

It depends on the type of tuna you choose. You can safely eat 2 to 3 servings (up to 12 ounces) of canned light tuna per week because it is made from smaller fish. However, if you prefer white (albacore) tuna or yellowfin tuna, you should limit your intake to only 1 serving (4 ounces) per week and avoid other fish during that time.

Does eating fish help increase milk supply?

While fish itself is not a specific galactagogue (a substance that increases milk supply), the high-quality protein and healthy fats it provides support overall maternal health, which is essential for maintaining a strong supply. The DHA and nutrients in fish improve the quality of your milk, and staying well-nourished helps your body handle the energy demands of breastfeeding. If you want to dive deeper into pumping-related strategies, our How to Increase Milk Supply Through Pumping guide is a useful next read.

Conclusion

Seafood is a nutritional powerhouse that can provide incredible benefits for both you and your baby during your breastfeeding journey. By focusing on "Best Choices" like salmon, shrimp, and light tuna, you can safely enjoy 8 to 12 ounces of seafood each week without worrying about mercury. These foods support your baby's brain and eye development while helping you maintain your heart health and energy levels.

Remember:

Choose low-mercury fish 2–3 times per week.
Avoid large predatory fish like swordfish and king mackerel.
Focus on "Best Choices" to maximize DHA and iodine intake.
Listen to your body and your baby's reactions.

You're doing an amazing job navigating the complexities of new parenthood. If you ever feel unsure about your nutrition or your milk supply, we are here to help with certified lactation support and nourishing products.

Next Step: Check out our "Best Choices" seafood list and pick one new fish recipe to try this week. If you need a little extra support for your supply while you adjust your diet, browse our Lactation Supplements collection to help you reach your breastfeeding goals.

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

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