Is Fish Good for Breastfeeding Mothers? A Guide to Safe Seafood
Posted on May 25, 2026
Table of Contents
- Introduction
- The Nutritional Benefits of Fish for Breastfeeding
- Understanding Mercury and Breastfeeding
- Safe Fish Choices: The "Best Choices" List
- Fish to Limit or Avoid
- Can I Eat Sushi While Breastfeeding?
- How Much Fish Should You Eat?
- Boosting Your Milk Supply with Nutrition
- Easy Ways to Include Fish in Your Routine
- What About Fish Oil Supplements?
- Addressing Common Concerns
- Support for Your Journey
- Conclusion
- FAQ
Introduction
You have spent the last nine months carefully watching every bite of food. Now that your little one is here, you might be wondering if those pregnancy dietary restrictions still apply. One of the most common questions we hear is whether you can safely enjoy a seafood dinner while nursing. You want to nourish your body and provide the best for your baby, but the conflicting advice about mercury and contaminants can feel overwhelming.
At Milky Mama, we believe that feeding your baby should be a source of joy, not stress. We were founded by Krystal Duhaney, a Registered Nurse and International Board Certified Lactation Consultant (IBCLC), to provide you with the evidence-based information you need to thrive. If you want personalized help, our Certified Lactation Consultant Breastfeeding Help page is a great next step. Whether you are craving a salmon fillet or a tuna sandwich, we are here to help you navigate the facts.
This guide will explore the nutritional benefits of seafood, explain which fish are the safest choices, and help you understand how to balance your diet for optimal health. Fish is not only safe for most breastfeeding mothers, but it can also be a powerful tool for your baby's development.
The Nutritional Benefits of Fish for Breastfeeding
Fish is often called a nutritional powerhouse for a reason. It is packed with high-quality protein, which your body needs to recover from childbirth and maintain a steady milk supply. When you are breastfeeding, your body requires more nutrients than usual to support both your own wellness and your baby’s growth. For more ideas on nourishing your body, take a look at What Should I Eat While Breastfeeding?.
One of the most important components found in fish is Omega-3 fatty acids. These are essential fats that the human body cannot produce on its own. The two most critical types for breastfeeding mothers are EPA and DHA (docosahexaenoic acid). DHA is a major structural component of the brain and the retina of the eye.
When you consume fish rich in DHA, that nutrient passes through your breast milk to your baby. Research suggests that adequate DHA intake during infancy supports cognitive development and healthy vision. It may also help support your own cardiovascular health and mood during the postpartum period.
Beyond healthy fats, fish provides other vital nutrients:
- Vitamin D: Helps your body absorb calcium for strong bones.
- Vitamin B12: Essential for nerve function and the production of red blood cells.
- Iodine: Supports your thyroid health and your baby’s brain development.
- Choline: Helps with the development of the baby's spinal cord and brain.
- Selenium: A powerful antioxidant that supports the immune system.
Key Takeaway: Fish provides essential DHA and EPA fats that are critical for your baby’s brain and eye development, while also supporting your own recovery and heart health.
Understanding Mercury and Breastfeeding
The main reason mothers hesitate to eat fish is the concern over mercury. Mercury is a metal that occurs naturally in the environment but is also released through industrial activities. It settles in oceans and lakes, where it is converted into methylmercury.
Fish absorb this methylmercury as they feed. Because it binds to the proteins in the fish's muscle tissue, it stays in their bodies. Smaller fish have very little mercury, but larger, long-lived predatory fish can accumulate higher levels over time.
When you eat fish, the mercury can pass into your bloodstream and eventually into your breast milk. High levels of mercury exposure can potentially affect a developing baby's nervous system. However, it is important to keep this in perspective. For most mothers, the benefits of the nutrients in fish far outweigh the risks of low-level mercury exposure, as long as you choose the right types of fish.
It is a common myth that you can "cook out" the mercury or trim it away. Since mercury is in the muscle meat rather than the fat, trimming the skin or frying the fish does not reduce the mercury content. The best strategy is simply to choose fish that are naturally lower in mercury.
Safe Fish Choices: The "Best Choices" List
The FDA and EPA have created helpful categories to help you decide which seafood to put on your plate. For breastfeeding mothers, the "Best Choices" category includes fish that are low in mercury and high in beneficial nutrients. You can safely eat 2 to 3 servings of these fish per week.
Common "Best Choices" include:
- Salmon: A top source of DHA and very low in mercury.
- Tilapia: A mild, lean white fish that is widely available.
- Cod: Great for protein and B vitamins.
- Shrimp: Low in fat and rich in iodine.
- Sardines: These are packed with calcium and Omega-3s.
- Canned Light Tuna: Note that "light" tuna is lower in mercury than "white" or Albacore tuna.
- Pollock: Often used in fish sticks or fish tacos.
- Catfish: A good source of protein and Vitamin D.
By sticking primarily to this list, you can maximize the DHA your baby receives while keeping mercury levels at a minimum. We often suggest keeping frozen salmon fillets or canned sardines on hand for quick, nutrient-dense meals between nursing sessions.
Action Steps for Choosing Fish
- Focus on "Best Choices" like salmon, shrimp, and cod.
- Aim for 8 to 12 ounces of variety per week.
- Rotate the types of fish you eat to get a broad range of vitamins.
- Check for local advisories if you are eating fish caught by friends or family in local lakes.
Fish to Limit or Avoid
While most fish are wonderful for your diet, there are a few that you should limit or avoid entirely while breastfeeding. These are typically large, predatory fish that live for a long time and accumulate significant amounts of mercury.
Choices to Avoid:
- Shark: High mercury levels.
- Swordfish: Large predatory fish with high accumulation.
- King Mackerel: Significantly higher in mercury than other mackerel types.
- Tilefish (from the Gulf of Mexico): Known for high mercury concentrations.
- Bigeye Tuna: Often used in high-end sushi; choose other tuna varieties instead.
- Marlin: Another large predator to skip for now.
Good Choices (Limit to 1 serving per week): There is also a middle category called "Good Choices." You can eat one 4-ounce serving of these per week, provided you do not eat any other fish that week. This list includes:
- Albacore (White) Tuna: This has more mercury than canned light tuna.
- Halibut: A delicious firm fish that should be eaten in moderation.
- Mahi Mahi: Popular in restaurants but carries a moderate mercury load.
- Snapper: Frequently found in coastal regions.
If you happen to eat a meal from the "Avoid" list, do not panic. One meal is unlikely to cause harm. Just return to the "Best Choices" list for your next several seafood meals to balance your intake.
Can I Eat Sushi While Breastfeeding?
During pregnancy, many mothers are told to avoid raw fish due to the risk of listeria or other foodborne illnesses. Once you are breastfeeding, the rules change slightly. The risk of foodborne illness from sushi primarily affects the mother rather than the baby. Listeria does not typically pass through breast milk.
However, a mother who gets food poisoning can become very dehydrated, which may temporarily impact her milk supply. If you choose to eat sushi, ensure it comes from a reputable, high-quality source to minimize the risk of illness.
The most important thing to remember with sushi is still the mercury content. Many popular sushi rolls use Ahi (Yellowfin) or Bigeye tuna, which are higher in mercury. Opt for salmon rolls, shrimp tempura, or eel (unagi) to stay in the "Best Choices" zone.
Key Takeaway: Sushi is generally considered safe while breastfeeding, but you should still prioritize low-mercury fish and choose reputable restaurants to avoid foodborne illness.
How Much Fish Should You Eat?
The general recommendation for breastfeeding parents is to consume 8 to 12 ounces of low-mercury fish per week. This usually equates to two or three servings.
A "serving" is about 4 ounces. If you aren't sure how to measure that, a 4-ounce portion is roughly the size and thickness of the palm of your hand. For many moms, this looks like a salmon fillet for dinner twice a week and perhaps a tuna salad sandwich for lunch.
Eating fish in these amounts provides a steady stream of DHA to your milk without exceeding safe mercury thresholds. If you find it difficult to eat this much fish, you are not alone. Many parents find the smell or preparation of fish difficult during the early weeks of parenthood.
In those cases, you might look into other ways to support your nutrition. We offer a variety of lactation supports, such as our Pumpin' Punch™ or Lactation LeMOOnade™, which help keep you hydrated while you focus on a balanced diet.
Boosting Your Milk Supply with Nutrition
While fish provides the building blocks for high-quality milk, many mothers also look for ways to increase the volume of their milk. Nutrition plays a huge role in this. Foods that are thought to support milk production are called galactagogues.
Common galactagogues include oats, flaxseed, and brewer's yeast. These ingredients are rich in iron and fiber, which support your energy levels. We use these functional ingredients in several of our products. For example, our Emergency Lactation Brownies are a favorite for many of our moms who want a delicious way to incorporate these nutrients into their day.
It is important to remember that a varied diet is your best friend. Combining lean proteins like fish with complex carbohydrates and plenty of water creates a strong foundation for your breastfeeding journey.
This product is not intended to diagnose, treat, cure, or prevent any disease. Consult with your healthcare provider for medical advice. We always recommend speaking with your doctor or a lactation consultant before starting new herbal supplements. If you want to explore options, our Lactation Supplements collection is a helpful place to start.
Easy Ways to Include Fish in Your Routine
When you are exhausted and caring for a newborn, cooking a gourmet fish dinner is likely the last thing on your mind. Here are some simple, low-effort ways to get your weekly servings of fish:
- Canned Salmon or Chicken of the Sea: Use canned salmon to make quick salmon patties or add it to a salad. It is often wild-caught and very high in Omega-3s.
- Frozen Fillets: Keep a bag of frozen, individually wrapped salmon or tilapia fillets in the freezer. They thaw quickly and can be baked in the oven with a little olive oil and lemon in about 15 minutes.
- Sheet Pan Meals: Place your fish fillets on a baking sheet with some asparagus or broccoli. Season everything together and bake. This makes cleanup incredibly easy.
- Fish Tacos: Use white fish like cod or pollock. You can even use high-quality frozen breaded fish fillets for a faster version. Top with cabbage slaw and lime.
- Pantry Staples: Stock up on sardines or anchovies. They have a long shelf life and can be smashed onto whole-grain toast for a very fast, nutrient-packed snack.
What About Fish Oil Supplements?
If you truly dislike the taste of fish or have an allergy, you might wonder if a fish oil supplement is a good substitute. Many lactation consultants and doctors recommend DHA supplements for breastfeeding mothers who do not eat fish. If you want a deeper look at lactation support options, read How Lactation Supplements Work to Boost Your Milk Supply.
These supplements can help ensure your milk contains the DHA your baby needs for brain development. Look for a high-quality, purified fish oil or an algae-based DHA supplement if you prefer a vegan option.
While supplements are helpful, they do not provide the protein, Vitamin D, and minerals that whole fish provides. If you can manage a few servings of fish a week, that is usually the preferred way to get your nutrients.
Addressing Common Concerns
Many mothers worry that eating fish will make their milk taste "fishy" or cause their baby to have gas. In reality, the flavors of the foods you eat do pass into your milk in very subtle ways. This is actually a good thing! It introduces your baby to a variety of flavors, which may make them more open to different foods when they start solids.
True allergies to fish in breastfed infants are rare. If you notice your baby developing a rash, hives, or extreme fussiness after you eat fish, consult your pediatrician. Otherwise, you can feel confident that your seafood dinner is doing more good than harm.
Every drop of milk you produce is a gift to your baby. Whether you are exclusively breastfeeding or pumping and supplementing, your body is doing incredible work. Taking care of your own nutrition by including healthy fats and proteins is one of the best ways to sustain that work.
Support for Your Journey
At Milky Mama, we know that breastfeeding is a journey that requires support. It is natural to have questions about what you should eat, how often to pump, or how to handle supply dips. You are doing an amazing job, and it is okay to ask for help when you need it.
If you are struggling with supply or just want more personalized guidance, we offer Breastfeeding 101 courses and virtual lactation consultations. Our team of experts can help you create a plan that fits your lifestyle. Remember, you don't have to navigate this alone.
Conclusion
Including fish in your diet while breastfeeding is a smart way to support your baby’s growth and your own wellness. By choosing low-mercury options like salmon, shrimp, and light tuna, you can enjoy the many benefits of Omega-3s and high-quality protein without worry.
- Eat 8–12 ounces of low-mercury fish per week.
- Focus on "Best Choices" to maximize DHA and minimize mercury.
- Avoid high-mercury fish like swordfish and king mackerel.
- Stay hydrated and maintain a balanced diet to support your supply.
Key Takeaway: Fish is a nutritional asset for breastfeeding mothers. By making informed choices, you are providing your baby with the essential building blocks for a healthy brain and a bright future.
If you are looking for more ways to support your breastfeeding goals, explore our range of Lactation Snacks and supplements. We are here to empower you every step of the way.
FAQ
Is it safe to eat tuna while breastfeeding?
Yes, it is safe to eat tuna, but you should choose the right variety. Canned light tuna is lower in mercury and can be eaten 2 to 3 times per week, while Albacore (white) tuna should be limited to once per week. Avoid Bigeye tuna, as it contains much higher mercury levels that can pass into your breast milk.
Can eating fish increase my milk supply?
While fish is not a traditional galactagogue like oats or flaxseed, the high-quality protein and healthy fats it provides support your overall health, which is essential for maintaining a strong supply. If you want more everyday support with hydration and nutrition, our Lactation Drink Mixes & Powders collection is worth exploring.
Which fish have the lowest mercury for nursing moms?
Salmon, tilapia, shrimp, cod, and sardines are among the best choices for breastfeeding mothers because they are very low in mercury. These options are also high in the nutrients your body needs during the postpartum period, such as Vitamin D and Omega-3 fatty acids.
What happens if I accidentally eat a high-mercury fish?
If you occasionally eat a fish from the "avoid" list, such as swordfish, there is no need to panic. The risk comes from consistent, long-term exposure rather than a single meal. Simply avoid high-mercury fish for the next several weeks and stick to the "Best Choices" list to allow your body to naturally process the mercury.
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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