Herring is one of the most affordable fatty fish available, and one of the few foods that naturally delivers three nutrients most people fall short on: omega-3 fatty acids, vitamin D, and vitamin B12. According to the World Health Organization (WHO), more than 1 billion people worldwide have insufficient vitamin D levels — and herring is one of the richest food sources of that vitamin of any food on earth.
At the same time, herring’s reputation is often oversimplified. Some write it off as “junk food” because of its salt content and smell; others treat it as a superfood. The truth is more nuanced: fresh or lightly salted herring is nutritionally a very different product from heavily salted, canned herring — and for some people, herring genuinely isn’t a good fit.
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What Is Herring and Why Nutritionists Care
Herring (Clupea harengus, Atlantic; Clupea pallasii, Pacific) is a small, pelagic fish that lives in the cold waters of the North Atlantic and Pacific Oceans. Those cold waters are exactly why herring is nutritionally interesting: to keep functioning in icy water, herring stores unusually high amounts of omega-3 fats (EPA and DHA) — the same fats considered most beneficial for heart and brain health, and the ones most people chronically underconsume.
Unlike salmon or trout, herring rarely gets top billing in the US — but it’s just as nutritious and considerably more affordable. It’s most commonly found pickled, smoked, or canned rather than fresh, and that preparation method has a major effect on its nutrition profile. Fresh and salted herring are, in practical terms, two very different foods when it comes to sodium content.
Among all commonly eaten fatty fish, herring stands out for its especially high vitamin D content — a nutrient critical for immune function, bone health, and hormone regulation.
Atlantic Herring Nutrition Facts (Fresh, per 100 g / 3.5 oz)
| Nutrient | Amount | % Daily Value* | What this means |
|---|---|---|---|
| Calories | 158 kcal | 8% | Roughly the same as chicken breast — not a diet food, but not overly fatty either |
| Protein | 17.9 g | 36% | A complete protein: it contains all the essential amino acids your body can’t make on its own |
| Total fat | 9.0 g | 12% | Mostly heart-healthy omega-3 fat, not saturated fat |
| — of which omega-3 (EPA+DHA) | 1.7 g | — | Exceeds the WHO’s recommended minimum of 0.25–0.5 g/day — meaning one serving already meets your daily need |
| Carbohydrates | 0 g | 0% | None |
| Vitamin D | 1,628 IU (40.7 mcg) | 204% | One of the best food sources on earth — a single serving exceeds your full daily need |
| Vitamin B12 | 13.7 mcg | 571% | Supports nerve function and red blood cell production; one serving covers about a week’s worth |
| Selenium | 36.5 mcg | 66% | Supports the body’s antioxidant defenses and thyroid function |
| Phosphorus | 236 mg | 19% | Supports bone and teeth health |
| Sodium (fresh) | 90 mg | 4% | A safe level — sodium only becomes a concern in salted or pickled forms |
| Iodine | ~52 mcg | ~35% | Important for healthy thyroid function |
*Based on a 2,000-calorie diet and current FDA Daily Values. Source: USDA FoodData Central, ID 175117.
One serving of herring (about 4.6 oz/130 g) covers nearly 7–8 times your daily vitamin B12 needs and provides a full day’s worth of vitamin D — something most people don’t get even from a week of combined meals. All of that comes in at around 205 calories.
Health Benefits
Heart Health
Omega-3s in herring support your heart in several ways at once: they lower triglycerides (“bad” blood fats), reduce the risk of blood clots, help maintain a steady heart rhythm, and calm inflammation in blood vessel walls. A major 2019 review pooling data from more than 77,000 people found that people who regularly eat fatty fish have fewer heart attacks and strokes. That doesn’t mean fish “cures” heart disease — but as part of a balanced diet, it’s one of the most well-supported ways to support cardiovascular health.
Brain and Nervous System Support
DHA is literally a building block of the brain — almost half of the fat in brain tissue is DHA. Without enough of it, the brain can’t properly build and renew itself. Getting enough dietary DHA is linked to better memory and focus, a lower risk of depression, and slower age-related brain changes.
Vitamin B12, which herring provides in abundance, is essential for maintaining the protective coating around nerves. When you don’t get enough, it can show up as numbness in the hands or feet, memory problems, and chronic fatigue.
Bone Health
The vitamin D in herring is natural D3 (cholecalciferol), which your body absorbs far more efficiently than the synthetic D2 found in plant sources. Vitamin D controls how much calcium your gut absorbs — without it, you only absorb 10–15% of the calcium in your food instead of 30–40%. In other words, you could drink milk by the gallon and still fall short without enough vitamin D. The phosphorus in herring further supports bone mineralization. This matters most for postmenopausal women and older adults at risk of osteoporosis.
Inflammation and Immune Support
Omega-3s are the raw material your body uses to make its own anti-inflammatory signals, helping keep inflammation from smoldering chronically. Studies show that people who regularly eat fatty fish tend to have lower levels of C-reactive protein (CRP) — a marker doctors check in blood work to spot hidden inflammation.
Selenium supports the body’s antioxidant enzyme systems and helps the thyroid function properly.
Muscle Support and Recovery
At 17.9 g of complete protein per 100 g, herring is a solid protein source for a fish. It contains all nine essential amino acids in a ratio your body can use efficiently. For people who exercise regularly, the combination of protein and omega-3s is especially valuable: some research suggests omega-3s help muscles recover and rebuild more effectively after training, making workouts more productive.
Risks and Who Should Be Cautious
High Sodium in Salted and Pickled Forms
This is the biggest practical downside for most of the ways herring is typically eaten. Fresh herring has about 90 mg of sodium per 100 g (4% DV). Salted herring can have 1,200–2,000 mg per 100 g — nearly a full day’s sodium in one small serving. For people with high blood pressure, kidney disease, or heart failure, regularly eating salted herring can contribute to elevated blood pressure and fluid retention. Soaking it in milk or water cuts sodium by 30–50%, or you can simply opt for lightly salted or fresh-frozen herring instead.
Purines: A Caution for Gout
Herring contains purines, which your body converts into uric acid. When uric acid builds up, it can crystallize in joints and trigger the painful flare-ups known as gout. If you’ve been diagnosed with gout or have elevated uric acid, talk to your doctor about appropriate serving size and frequency.
Allergies and Sensitivities
Fish is one of the FDA’s “Big Nine” major food allergens. A herring allergy can cause skin reactions, digestive discomfort, or, in rare cases, anaphylaxis. Some preparations — pickled versions with added spices, mustard, or vinegar — may introduce additional allergens worth checking for.
Contaminant Exposure
Atlantic herring is one of the lowest-mercury fish you can eat. Like all seafood, it may contain trace amounts of heavy metals and industrial pollutants such as PCBs. At a typical intake of 2–3 servings a week, these levels are considered safe for healthy adults. Pregnant women should follow the joint FDA/EPA fish consumption guidelines and stay within recommended limits.
Who Benefits Most
People with low vitamin D (especially in winter). Vitamin D deficiency is common in the US, particularly during the fall and winter months and in northern states with limited winter sunlight. Two servings of herring a week can supply a meaningful share of your dietary D3 — especially useful if you’re not taking a supplement. This matters most if you spend little time outdoors, work mostly indoors, or have more melanin in your skin (which reduces vitamin D synthesis).
Pregnant women and those planning pregnancy. DHA is critical for fetal brain and eye development in the third trimester. ACOG recommends an additional 200 mg of DHA per day during pregnancy, and one serving of herring (3.5–4 oz/100–120 g) can fully cover that. Choose lightly salted or fresh forms, watch your sodium intake, and confirm portion size with your doctor.
Older adults (60+). As we age, the stomach produces less of what’s needed to absorb B12, so deficiency can develop even with adequate food intake. Herring is one of the most concentrated food sources of B12 available — one serving covers several days’ worth. Also valuable for this group: vitamin D for bone health and fall prevention, omega-3s for memory and mental clarity, and protein to help preserve muscle mass (age-related muscle loss is called sarcopenia).
People at higher risk for heart disease. If you have elevated triglycerides, a history of arrhythmia, or a family history of coronary artery disease, working fatty fish into your diet 2–3 times a week is a recommendation echoed by most major cardiology guidelines, including the American Heart Association (AHA). Herring is a budget-friendly alternative to salmon with a comparable omega-3 profile.
Pescatarians. If you’ve cut out meat but kept fish, herring is an efficient way to cover nutrients that are hard to get from plants alone: vitamin B12 (absent from plant foods), vitamin D, EPA, and DHA. One important nuance: plant sources only provide ALA, a precursor omega-3 that your body converts to EPA and DHA very inefficiently — less than 10%. Fish delivers EPA and DHA ready to use.
How to Eat It: Serving Size and Forms
Recommended serving size and frequency. For fresh or lightly salted herring, aim for 3–5 oz (80–150 g), 2–3 times a week — in line with WHO recommendations and the Dietary Guidelines for Americans for fatty fish. For salted or pickled herring, keep it to 1–2 oz (30–50 g) at a time, not daily, given the high sodium content.
Forms and how they affect nutrition:
- Fresh/frozen and cooked — the best option. Omega-3s and vitamins hold up well when baked (up to 356°F/180°C) or steamed. High-heat frying partially breaks down omega-3s through oxidation.
- Lightly salted — an acceptable choice: salt barely affects omega-3, B12, or D content, but sodium rises significantly. Soaking in water or milk for 2–4 hours reduces saltiness.
- Pickled — often contains added sugar, vinegar, and preservatives; sodium stays high.
- Smoked (hot- or cold-smoked) — smoking can produce the same potentially carcinogenic compounds formed when wood burns. Better as an occasional treat than a daily habit.
- Canned in oil — convenient, but check the label: a good option if it’s made without excess salt or additives.
Best pairings for absorption. Vitamin D is fat-soluble, so eating herring alongside a fat source — avocado, olive oil, eggs — improves absorption. The fat in herring also helps your body absorb fat-soluble nutrients from vegetables served alongside it, like beta-carotene from carrots or lutein from spinach.
Common Myths About Herring
“Herring is a fatty, unhealthy fish you should avoid.”
This myth dates back to the 1980s and ’90s, when “fat” in food was treated as inherently risky, without distinguishing between fat types. Herring is indeed a fatty fish — but most of that fat is omega-3 (EPA, DHA), exactly the type most people don’t get enough of. It’s actually low in saturated fat — less than a typical chicken thigh. Current dietary guidance (from the AHA, WHO, and others) doesn’t just avoid restricting fatty fish — it actively recommends eating it regularly.
“Salted herring is the same as fresh, just tastier.”
In reality, these are very different products in terms of health impact. Fresh herring has about 90 mg of sodium per 100 g — a safe level for most people. Salted herring can have up to 2,000 mg — nearly your entire daily sodium budget in one small serving. Regularly eating large, unrestricted amounts of salted herring can contribute to higher blood pressure and added strain on the kidneys, especially in people already prone to those issues. That doesn’t mean you can never eat salted herring — but portion and frequency matter.
“Fish oil capsules are the same as eating herring.”
Fish oil supplements do contain EPA and DHA, but whole fish offers much more: B12, vitamin D, selenium, iodine, complete protein, and zinc, all working together. Isolated nutrients don’t necessarily behave the same way as nutrients from whole foods — similar to how vitamin C from a pill and vitamin C from an orange aren’t quite interchangeable. Capsules are a reasonable option if you can’t or don’t want to eat fish, but they’re not a substitute for the whole food.
“Herring isn’t for anyone watching their weight.”
At 158 calories per 100 g, herring is moderate in calories — for comparison, chicken breast runs about 165 calories and low-fat cottage cheese up to 130. The combination of protein and omega-3s promotes lasting fullness. Research suggests that regular fish consumption, as part of a balanced diet, isn’t linked to weight gain — if anything, it’s a feature of eating patterns (like the Mediterranean and Nordic diets) associated with healthy body weight.
Bottom Line
Herring is an underrated addition to the modern diet. It delivers a rare combination of nutrients that are hard to get elsewhere: vitamin D in amounts that exceed your daily need in a single serving, vitamin B12 at exceptional concentrations, and EPA/DHA for heart and brain health. The benefits and risks of herring are often oversimplified — in reality, it comes down to form and amount: fresh or lightly salted herring offers the most benefit with the least risk.
Try working two servings of fatty fish into your week — herring is one of the most affordable and effective ways to do it. If you have chronic heart or kidney disease, or gout, talk to your doctor about the right form and amount for you.
