Yes, salmon is generally considered safe to eat while breastfeeding, with health authorities recommending 8 to 12 ounces (2 to 3 servings) of low-mercury fish like salmon per week.
You’ve probably heard that fish is good for you during breastfeeding, then read a warning about mercury, and now you’re staring at a salmon fillet wondering which side is right. That split-second of doubt is common. New moms get conflicting messages about seafood constantly, and salmon is healthy but also an oily fish — a term that makes some guidelines sound more restrictive than they actually are.
So can you eat salmon while breastfeeding? Yes, and you probably should. Salmon is classified by the FDA and EPA as a “Best Choice” fish, meaning it’s low in mercury and safe to eat two to three servings per week. It also delivers DHA, an omega‑3 fatty acid that passes into breast milk and supports your baby’s brain and eye development. Below we’ll walk through the numbers, the safe fish list, and the one UK-specific limit you should know about.
The Benefits of Eating Salmon While Nursing
Salmon is one of the richest natural sources of DHA (docosahexaenoic acid), a type of omega‑3 that is particularly important during infancy. The Children’s Hospital of Philadelphia notes that breastfeeding mothers can boost the DHA in their milk by eating fish two to three times per week, listing salmon as one of the best sources. A standard 4‑ounce serving of pink salmon provides roughly 0.91 grams of combined DHA and EPA, according to Cleveland Clinic data.
These fatty acids are passed to your baby through breast milk, where they support brain development and may play a role in visual system maturation. The benefits of breastfeeding itself — including the transfer of these nutrients — are thought to outweigh any theoretical risk from the trace amounts of mercury found in low‑mercury fish like salmon, as the CDC explains in its guidance.
Beyond omega‑3s, salmon also provides high‑quality protein, vitamin D, and B vitamins, all of which support your own recovery and energy levels during the postpartum period. Incorporating salmon a couple of times a week is a practical way to get these nutrients without complicating your diet.
Why The Mercury Confusion Sticks
The worry about mercury during breastfeeding comes from a real place: when a mother eats fish, a small amount of mercury can pass into her breast milk. High levels of methylmercury are known to affect a developing nervous system, which is why certain fish are off‑limits. But the confusion starts because “fish” is treated as one category in casual conversation, while health organizations separate them into clear tiers.
Here’s the distinction that clears up most of the uncertainty:
- Mercury content varies widely by species. Salmon is one of the lowest‑mercury fish you can buy. The FDA and EPA place it in the “Best Choice” category, meaning you can safely eat two to three servings per week.
- “Oily fish” is not the same as “high‑mercury fish.” Oily fish (salmon, mackerel, sardines) are rich in omega‑3s, but the UK’s NHS also limits them to two portions per week because of potential pollutants like dioxins and PCBs — not mercury. US guidelines don’t set a separate oily‑fish cap, only the NHS does.
- Serving size matters as much as frequency. A single serving of fish for a breastfeeding woman is 4 ounces before cooking, roughly the size of the palm of her hand. Two servings of salmon a week is well within all major guidelines.
- Most people already eat less fish than recommended. The average American eats about half the suggested amount of seafood. For breastfeeding women, the risk is more often undereating low‑mercury fish than overdoing it.
- The benefits of breastfeeding may outweigh the possible risk. The CDC states this explicitly in its maternal exposure section, noting that the nutritional advantages of breastfeeding typically exceed concerns from trace mercury exposure when following the safe‑fish list.
Once you know which fish are in which category, the anxiety usually fades. Salmon is squarely in the “eat freely within limits” group, not the “avoid” group, so you don’t need to second‑guess that filet.
Which Fish Are Safe and Which to Skip
The FDA and EPA maintain a three‑tier chart that makes it easy to choose. Salmon is listed under “Best Choices,” meaning you can aim for two to three servings per week. “Good Choices” — fish like albacore/white tuna, halibut, and grouper — should be limited to one serving per week. “Choices to Avoid” includes the highest‑mercury species: shark, swordfish, king mackerel, tilefish, orange roughy, and marlin. The chart also notes that when a mother eats fish, the mercury can pass into breast milk, which is why sticking to the low‑mercury options matters.
The CDC provides similar guidance, emphasizing that Mercury Passes into Breast Milk, but the benefits of breastfeeding may be greater than the possible risks from mercury exposure. This is not a reason to skip salmon — it’s a reason to choose your fish wisely.
| Fish Type | FDA/EPA Category | Servings per Week |
|---|---|---|
| Salmon (wild or farmed) | Best Choice | 2–3 servings |
| Anchovies, herring, sardines | Best Choice | 2–3 servings |
| Light canned tuna (skipjack) | Best Choice | 2–3 servings |
| Albacore/white tuna | Good Choice | 1 serving |
| Halibut, grouper, mahi-mahi | Good Choice | 1 serving |
| Shark, swordfish, king mackerel | Choices to Avoid | 0 servings |
Note that the NHS in the UK adds an extra recommendation: limit oily fish (which includes salmon) to two portions per week. This is a separate guideline from the US mercury‑based system. If you’re following UK advice, stick to two portions of salmon a week; if you’re in the US, the FDA’s 8–12 ounce total across all “Best Choice” fish applies. Both approaches allow at least two servings of salmon per week.
How to Include Salmon Safely in Your Breastfeeding Diet
Getting the benefits without the worry comes down to a few simple habits.
- Stick to the serving size. A single serving is 4 ounces of cooked salmon, about the size of your palm. Pre‑portioned frozen fillets make this easy.
- Vary your fish across the week. The FDA and EPA recommend eating a variety of low‑mercury seafood, not just salmon. Rotate with sardines, light canned tuna, or pollock to spread your nutrient intake.
- Cook thoroughly. Salmon should reach an internal temperature of 145°F to kill potential bacteria or parasites. Raw salmon (sushi‑grade) is generally not recommended during breastfeeding because of food safety concerns, though the risk of transmission through breast milk is considered low.
- Check local advisories if you catch your own. Wild‑caught salmon from local waters may have different contaminant levels than store‑bought fish. The EPA’s fish advisory website can help you find area‑specific guidance.
If you prefer canned salmon, choose the “with bones” variety — the soft, edible bones add calcium, which is particularly helpful for breastfeeding moms. Just drain and rinse to reduce sodium.
What About Other Salmon Products and Supplements?
Smoked salmon (lox) is also low in mercury, but it is typically cold‑smoked and not fully cooked, which raises a small listeria concern. The CDC advises that people who are pregnant or breastfeeding consider fully cooking smoked salmon to reduce that risk. Heating it until steaming — for example, on a bagel in a toaster oven or in a warm pasta dish — addresses the concern.
Fish oil supplements are another way to get DHA, though they are not a perfect substitute for whole fish. Pure omega‑3 supplements that are third‑party tested for mercury are widely available, and many prenatal vitamins already contain DHA. The American Pregnancy Association notes that DHA supplementation can be helpful during breastfeeding, but whole fish also provides protein and other nutrients that supplements lack.
The NHS oily fish limit applies to whole fish, not supplements. If you are already eating two portions of salmon per week, adding a fish oil capsule will not exceed that recommendation.
| Salmon Product | Mercury Category | Key Consideration |
|---|---|---|
| Fresh or frozen salmon fillet | Best Choice | Cook to 145°F; 2–3 servings/week (US) |
| Canned pink salmon (with bones) | Best Choice | Rinse to reduce sodium; bones add calcium |
| Smoked salmon (cold‑smoked) | Best Choice | Heat until steaming to reduce listeria risk |
Because the mercury content of salmon is naturally low, you do not need to track your intake obsessively. A typical breastfeeding diet that includes salmon two to three times a week is well within every major health authority’s recommendation.
The Bottom Line
Salmon is a safe, nutrient‑dense choice for breastfeeding mothers. It provides DHA for your baby’s development, protein for your own recovery, and fits comfortably within US and UK guidelines when eaten in standard servings two to three times per week. The key is to avoid the few high‑mercury fish (shark, swordfish, king mackerel, tilefish) and to vary the low‑mercury seafood you eat.
If you have specific concerns about your baby’s development or your own dietary restrictions, your obstetrician, midwife, or a registered dietitian can help you tailor the fish recommendations to your exact situation — including how salmon fits with your overall breastfeeding diet and any supplements you may be taking.