💎 Key Nutrients
What Is Fish, Haddock, Raw? Origin and Varieties
Haddock (scientific name Melanogrammus aeglefinus) is a demersal (bottom‑dwelling) cold‑water marine fish in the cod family, found on both sides of the North Atlantic. With a streamlined body and distinctive dark lateral line and black blotch on each flank, haddock is easily recognizable compared with other white fish species like cod or pollock. Traditionally harvested off the coasts of New England, Canada, and northern Europe, haddock has been a staple in British fish and chips and Scandinavian cuisines for centuries. Its name likely derives from the Old English “hadde,” referring to a type of fish, with “‑ock” as a diminutive suffix. The species has adapted to cold, nutrient‑rich waters, thriving at depths of several hundred meters. In markets, haddock is sold whole, gutted, or filleted, and may also be found smoked (e.g., Finnan haddie) or salt‑cured. Raw haddock has a firm, white flesh with a mild, slightly sweet flavor, making it versatile across culinary traditions. Unlike oily fish like salmon or mackerel, haddock is a lean fish, meaning it has minimal visible fat but still provides essential nutrients, especially protein and micronutrients. While commercial catch methods vary from trawling to longlining, consumers seeking sustainability are advised to look for certifications or local advisories that indicate environmentally responsible fishing practices. Haddock’s texture and flavor have contributed to its widespread use in soups, stews, poaching dishes, and baked recipes. Despite being lean, its flesh remains tender when cooked properly due to its high water content and delicate muscle structure, characteristics developed in its cold‑water habitat.
Nutrition Profile: A Detailed Breakdown
Haddock’s nutrient profile reflects its status as a nutrient‑dense lean protein with very low calories and almost no carbohydrates. Per 100 g raw, haddock provides ~74 kcal, with approximately 16.32 g of protein, 0.45 g of total fat, and 0 g carbohydrates. This macro ratio makes haddock particularly beneficial for individuals prioritizing high protein with minimal caloric load. The fat present is predominantly unsaturated, including small amounts of omega‑3 fatty acids such as DHA (~0.089 g) and EPA (~0.042 g) per 100 g, contributing modest support for cardiovascular health. Although levels of omega‑3s in haddock are lower than in fatty fish like salmon, they still play a role in anti‑inflammatory processes and cell membrane integrity. Micronutrients in haddock are notable for supporting metabolic and immune functions. With ~1.83 µg of vitamin B12 per 100 g, haddock provides a significant portion of daily needs for this nutrient critical for nerve function, red blood cell formation, and DNA synthesis. Selenium (~25.9 µg) is another standout micronutrient; as an antioxidant cofactor, selenium contributes to thyroid hormone metabolism and protection against oxidative stress. Potassium (~286 mg) adds electrolyte balance support, while phosphorus (~227 mg) aids bone health and energy metabolism. Haddock also supplies modest amounts of niacin (~3.36 mg) and vitamin B6 (~0.281 mg), both essential for energy production and brain health. While calcium (~11 mg) and iron (~0.17 mg) are not high compared with dairy or red meat, they still contribute to overall intake in a balanced diet. Vitamins A and D are present in small quantities, offering minor support for vision, immune function, and bone health. Because haddock contains no dietary fiber or sugars, it fits seamlessly into low‑carb and ketogenic diets but should be balanced with plant sources to ensure adequate fiber intake.
Evidence-Based Health Benefits
Regular fish consumption, including lean white fish like haddock, has been associated with multiple health benefits backed by scientific evidence. An umbrella review of fish consumption studies found that eating fish 2–4 servings per week was linked with reduced risk of cardiovascular disease (CVD) mortality, all‑cause mortality, stroke, myocardial infarction, and metabolic syndrome outcomes. Each additional ~20 g/day increment of fish intake corresponded to a 2%–7% lower risk of these outcomes, indicating dose‑response benefits across populations. Haddock, as a lower‑mercury option among fishes, fits well within these recommendations, providing key nutrients while minimizing contaminant exposure. Heart Health: Lean fish contribute to heart health through high‑quality protein, low saturated fat content, and modest omega‑3 fatty acids, which help reduce inflammation and improve lipid profiles. While fatty fish provide more omega‑3s, haddock still contributes meaningfully when consumed regularly within a balanced diet. Metabolic Support: B‑vitamins (niacin, B12, B6) in haddock support energy metabolism and nervous system function. In particular, vitamin B12 plays an essential role in lowering homocysteine levels, an independent marker of cardiovascular risk. Antioxidant Protection and Thyroid Function: Selenium in haddock protects against oxidative damage and supports the synthesis of thyroid hormones, which regulate metabolism. White fish have also been identified as useful sources of iodine, critical for thyroid hormone production where iodized salt intake may be inconsistent. Weight Management and Satiety: With high protein and low fat, haddock supports satiety and lean body mass preservation, a key factor in weight management strategies. Collectively, these effects underscore why public health guidelines, including the 2020–2025 Dietary Guidelines for Americans, continue to recommend regular consumption of a variety of fish as part of a healthy dietary pattern that supports both cardiovascular and overall health.
Potential Risks and Who Should Be Careful
While haddock offers many benefits, potential risks should be considered, especially regarding contaminants and food safety. The U.S. FDA and EPA monitor mercury levels in fish, and while haddock is generally categorized as a lower‑mercury fish, all seafood contains trace amounts of mercury — a neurotoxin that bioaccumulates in humans and is especially concerning for young children, pregnant women, and women planning pregnancy. These agencies recommend choosing fish lower in mercury and limiting overall intake to support brain and nervous system development in vulnerable populations. Allergic reactions to fish proteins are another important consideration; fish allergy is one of the most common adult food allergies and can cause symptoms ranging from mild hives to anaphylaxis. Individuals with known fish allergies should avoid haddock and other seafood entirely. Foodborne illness is another risk, as raw or improperly handled fish can harbor pathogenic bacteria or parasites. Proper refrigeration (≤40°F/4°C) and cooking to the internal temperature recommended for seafood (≈145°F/63°C) help mitigate these risks. Even in the refrigerator, raw haddock should be used within 1–2 days to prevent bacterial proliferation. Cross‑contamination between raw fish and ready‑to‑eat foods should be avoided by using separate cutting boards and thorough handwashing. Lastly, although haddock itself is low in saturated fats, excessive sodium intake from added sauces or breaded preparations can negate some cardiovascular benefits, particularly for individuals with hypertension or cardiovascular disease.
How to Select, Store, and Prepare Fish, Haddock, Raw
Selecting quality haddock begins at the market: choose fillets with firm, translucent flesh that springs back when touched and smell fresh, with a mild ocean aroma rather than a strong “fishy” scent. Whole fish should have clear eyes and bright red gills. Proper storage is crucial — raw haddock must be refrigerated promptly at or below 40°F (4°C) and used within 1–2 days of purchase to minimize bacterial growth. Seafood should never be left out at room temperature for more than 2 hours (or 1 hour above 90°F/32°C) to avoid entering the temperature “danger zone” where pathogens multiply rapidly. For longer storage, tightly wrap in moisture‑proof packaging and freeze at 0°F (-18°C) or lower; raw haddock can maintain best quality in the freezer for 3–8 months. Thaw frozen haddock in the refrigerator overnight to preserve texture and safety. Rinsing thawed fish under cold water and patting dry removes excess ice crystals and surface bacteria. Many cooking methods preserve nutrients and texture: poaching and steaming gently cook fish without added fats, while baking, grilling, and broiling can add flavor with minimal oil. If pan‑searing, use moderate heat and a light coating of healthy oil to prevent drying out. Avoid overcrowding the pan to ensure even cooking. Season haddock with herbs like dill, parsley, lemon zest, or capers to enhance flavor without excess sodium. For raw preparations (e.g., ceviche), ensure fish is sushi‑grade and follow rigorous food safety guidelines, including freezing for parasite destruction where recommended.
Best Ways to Eat Fish, Haddock, Raw
Haddock’s versatility makes it suitable for a wide array of preparations that retain its nutrition while offering delightful culinary experiences. Popular methods include poaching in a flavorful broth with aromatics like fennel and citrus, which keeps the fish moist and minimizes added fats. Steaming with ginger and scallions preserves delicate omega‑3s and vitamin content while creating a subtle, clean taste. Baking haddock with a crust of whole‑grain breadcrumbs, chopped nuts, or herbs adds texture and heart‑healthy fats without overwhelming the protein. Pan‑searing with minimal oil at moderate heat ensures a crisp exterior while protecting the tender interior. In more casual preparations, haddock can be used in fish tacos with cabbage slaw and avocado, or in hearty chowders with vegetables and beans — blending nutrition with warmth and satiety. Pairing haddock with potassium‑rich sides like roasted sweet potatoes or steamed greens enhances electrolyte balance and provides complementary micronutrients. For global flavors, consider Mediterranean herbs and lemon, or Asian seasonings like miso and soy for umami depth. Regardless of method, avoid deep‑frying or excessive batter, which significantly increases calorie and fat content and may diminish some nutritional benefits.
Nutrient Absorption: What Helps and Hinders
Maximizing nutrient absorption from haddock involves pairing it with foods that enhance uptake of key micronutrients. For example, adding vitamin C‑rich vegetables such as bell peppers or citrus salad alongside haddock can enhance iron absorption, even though haddock’s iron content is modest. Omega‑3 fatty acids, though present in smaller amounts than in oily fish, benefit from the inclusion of antioxidants found in herbs, nuts, and olive oil, which protect these polyunsaturated fats from oxidation during cooking. On the other hand, consuming haddock with extremely high‑phytate foods (e.g., raw legumes) may slightly inhibit mineral absorption due to phytate binding, though this effect is modest in balanced meals. Excessive alcohol consumption around mealtime can interfere with nutrient metabolism and should be limited. High sodium condiments added to haddock dishes can offset potassium’s beneficial effects on blood pressure, so use salt sparingly and leverage herbs and spices for flavor. Combining haddock with legumes, whole grains, and colorful vegetables creates balanced meals that optimize nutrient availability and support overall dietary quality.
Fish, Haddock, Raw for Specific Diets
Haddock fits well into keto and low‑carb diets due to its zero carbohydrates and low fat, providing lean protein without disrupting ketosis. In paleo and whole30 diets, haddock qualifies as an unprocessed, natural animal protein; pair with vegetables and healthy fats for a complete meal. For diabetic‑friendly eating, haddock’s minimal carbohydrate content and high protein promotes stable blood glucose levels, especially when combined with fiber‑rich sides. Although not compatible with vegan or vegetarian diets due to its animal origin, haddock can be incorporated into flexitarian or pescatarian patterns. In heart‑healthy diets, haddock serves as a lower‑sodium, lean fish option compared with processed fish products; seasoning with herbs rather than salt enhances cardiovascular benefits. Tailoring portion sizes (e.g., 3–4 oz cooked) and preparing with olive oil and vegetables supports diverse dietary frameworks while maintaining nutrient density.
❤️ Health Benefits
Supports Heart Health
Lean protein with modest omega‑3s reduces inflammation and supports lipid profiles.
Evidence: moderateEnhances Metabolic and Nervous System Function
High‑quality protein and B‑vitamins support energy metabolism and nerve function.
Evidence: strongAntioxidant Protection
Selenium acts as a cofactor for antioxidant enzymes, protecting cells from oxidative damage.
Evidence: strongWeight Management
High protein, low calories promote satiety and lean mass retention.
Evidence: moderate⚖️ Comparisons
Vs. Cod
Both are lean white fish, but haddock often has slightly higher selenium and B12 per 100 g.
Vs. Pollock
Pollock tends to be lower in sodium and slightly higher in omega‑3 content.
Vs. Salmon
Salmon is higher in total omega‑3 fatty acids and calories, but haddock is leaner.
🧊 Storage Guide
❄️
Fridge
1–2 days
🧊
Freezer
3–8 months
⚠️ Signs of
Spoilage:
- smell: strong fishy or sour odor
- visual: dull or discolored flesh, slimy surface
- texture: sticky or mushy feel
- when to discard: noticeable off‑odor and sliminess
👥 Special Considerations
elderly
Why: High protein and micronutrients help aging metabolism.
Recommendation: Include lean haddock to maintain muscle mass and support nutrient adequacy.
athletes
Why: High protein with low calories aids recovery and lean mass.
Recommendation: Post‑exercise haddock meal supports muscle repair.
children
Why: Provides protein and micronutrients for growth.
Recommendation: Offer appropriately portioned cooked haddock (≈2–3 oz).
pregnancy
Why: Provides omega‑3s and B12 while minimizing mercury exposure.
Recommendation: Consume haddock 2‑3 servings/week from low‑mercury fish choices.
breastfeeding
Why: Nutrients support milk quality and infant development.
Recommendation: Include haddock as part of varied low‑mercury seafood choices.
🔬 Detailed Nutrition Profile (USDA)
Common Portions
1.00 fillet
(193.00g)
3.00 oz
(85.00g)
| Nutrient | Amount | Unit |
|---|---|---|
| Water | 83.3800 | g |
| Energy | 74.0000 | kcal |
| Energy | 309.0000 | kJ |
| Protein | 16.3200 | g |
| Total lipid (fat) | 0.4500 | g |
| Ash | 1.2800 | g |
| Carbohydrate, by difference | 0.0000 | g |
| Fiber, total dietary | 0.0000 | g |
| Total Sugars | 0.0000 | g |
| Calcium, Ca | 11.0000 | mg |
| Iron, Fe | 0.1700 | mg |
| Magnesium, Mg | 21.0000 | mg |
| Phosphorus, P | 227.0000 | mg |
| Potassium, K | 286.0000 | mg |
| Sodium, Na | 213.0000 | mg |
| Zinc, Zn | 0.3200 | mg |
| Copper, Cu | 0.0210 | mg |
| Manganese, Mn | 0.0110 | mg |
| Selenium, Se | 25.9000 | µg |
| Vitamin C, total ascorbic acid | 0.0000 | mg |
| Thiamin | 0.0200 | mg |
| Riboflavin | 0.0570 | mg |
| Niacin | 3.3630 | mg |
| Pantothenic acid | 0.4030 | mg |
| Vitamin B-6 | 0.2810 | mg |
| Folate, total | 12.0000 | µg |
| Folic acid | 0.0000 | µg |
| Folate, food | 12.0000 | µg |
| Folate, DFE | 12.0000 | µg |
| Choline, total | 65.0000 | mg |
| Vitamin B-12 | 1.8300 | µg |
| Vitamin B-12, added | 0.0000 | µg |
| Vitamin A, RAE | 17.0000 | µg |
| Retinol | 17.0000 | µg |
| Carotene, beta | 0.0000 | µg |
| Carotene, alpha | 0.0000 | µg |
| Cryptoxanthin, beta | 0.0000 | µg |
| Vitamin A, IU | 57.0000 | IU |
| Lycopene | 0.0000 | µg |
| Lutein + zeaxanthin | 0.0000 | µg |
| Vitamin E (alpha-tocopherol) | 0.4500 | mg |
| Vitamin E, added | 0.0000 | mg |
| Tocopherol, beta | 0.0000 | mg |
| Tocopherol, gamma | 0.0000 | mg |
| Tocopherol, delta | 0.0000 | mg |
| Tocotrienol, alpha | 0.0000 | mg |
| Tocotrienol, beta | 0.0000 | mg |
| Tocotrienol, gamma | 0.0000 | mg |
| Tocotrienol, delta | 0.0000 | mg |
| Vitamin D (D2 + D3), International Units | 18.0000 | IU |
| Vitamin D (D2 + D3) | 0.5000 | µg |
| Vitamin D3 (cholecalciferol) | 0.5000 | µg |
| Vitamin K (phylloquinone) | 0.1000 | µg |
| Fatty acids, total saturated | 0.0910 | g |
| SFA 4:0 | 0.0000 | g |
| SFA 6:0 | 0.0000 | g |
| SFA 8:0 | 0.0000 | g |
| SFA 10:0 | 0.0000 | g |
| SFA 12:0 | 0.0010 | g |
| SFA 14:0 | 0.0040 | g |
| SFA 15:0 | 0.0010 | g |
| SFA 16:0 | 0.0630 | g |
| SFA 17:0 | 0.0010 | g |
| SFA 18:0 | 0.0200 | g |
| SFA 20:0 | 0.0000 | g |
| SFA 22:0 | 0.0000 | g |
| SFA 24:0 | 0.0000 | g |
| Fatty acids, total monounsaturated | 0.0610 | g |
| MUFA 14:1 | 0.0010 | g |
| MUFA 15:1 | 0.0000 | g |
| MUFA 16:1 | 0.0040 | g |
| MUFA 16:1 c | 0.0030 | g |
| MUFA 17:1 | 0.0060 | g |
| MUFA 18:1 | 0.0390 | g |
| MUFA 18:1 c | 0.0370 | g |
| MUFA 20:1 | 0.0050 | g |
| MUFA 22:1 | 0.0020 | g |
| MUFA 22:1 c | 0.0020 | g |
| MUFA 24:1 c | 0.0040 | g |
| Fatty acids, total polyunsaturated | 0.1660 | g |
| PUFA 18:2 | 0.0150 | g |
| PUFA 18:2 n-6 c,c | 0.0140 | g |
| PUFA 18:2 CLAs | 0.0000 | g |
| PUFA 18:3 | 0.0020 | g |
| PUFA 18:3 n-3 c,c,c (ALA) | 0.0020 | g |
| PUFA 18:3 n-6 c,c,c | 0.0000 | g |
| PUFA 18:4 | 0.0020 | g |
| PUFA 20:2 n-6 c,c | 0.0010 | g |
| PUFA 20:3 | 0.0020 | g |
| PUFA 20:3 n-3 | 0.0010 | g |
| PUFA 20:3 n-6 | 0.0010 | g |
| PUFA 20:4 | 0.0090 | g |
| PUFA 20:5 n-3 (EPA) | 0.0420 | g |
| PUFA 22:4 | 0.0010 | g |
| PUFA 22:5 n-3 (DPA) | 0.0050 | g |
| PUFA 22:6 n-3 (DHA) | 0.0890 | g |
| Fatty acids, total trans | 0.0040 | g |
| Fatty acids, total trans-monoenoic | 0.0030 | g |
| TFA 16:1 t | 0.0010 | g |
| TFA 18:1 t | 0.0030 | g |
| TFA 22:1 t | 0.0000 | g |
| TFA 18:2 t not further defined | 0.0010 | g |
| Fatty acids, total trans-polyenoic | 0.0010 | g |
| Cholesterol | 54.0000 | mg |
| Tryptophan | 0.2120 | g |
| Threonine | 0.8290 | g |
| Isoleucine | 0.8710 | g |
| Leucine | 1.5370 | g |
| Lysine | 1.7360 | g |
| Methionine | 0.5600 | g |
| Cystine | 0.2030 | g |
| Phenylalanine | 0.7380 | g |
| Tyrosine | 0.6380 | g |
| Valine | 0.9740 | g |
| Arginine | 1.1310 | g |
| Histidine | 0.5570 | g |
| Alanine | 1.1430 | g |
| Aspartic acid | 1.9360 | g |
| Glutamic acid | 2.8220 | g |
| Glycine | 0.9080 | g |
| Proline | 0.6690 | g |
| Serine | 0.7710 | g |
| Alcohol, ethyl | 0.0000 | g |
| Caffeine | 0.0000 | mg |
| Theobromine | 0.0000 | mg |
Source: USDA FoodData Central (FDC ID: 171964)
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