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Mackerel

Seafood

Mackerel

Mackerel is a nutrient-dense, oily fish prized for its high omega-3 fatty acid and vitamin B12 content.

Mackerel is a fatty saltwater fish known for its rich flavor, high omega-3 fatty acid content, and impressive nutrient density, commonly consumed grilled, smoked, or canned.

omega-3 rich fatty fish

Typical serving · 85g

Common varieties · Atlantic mackerel, Pacific mackerel, King mackerel, Spanish mackerel, Chub mackerel

90health

Overall context score across nutrition, safety, and diet fit

At a glance

Quick facts

Simple indicators based on nutrition, processing, and diet fit.

High proteinLow carbLow glycemicWeight lossDiabetes-friendlyGut health

The story

What makes it unique

Mackerel is a fast-digesting, high-quality protein source with exceptionally high levels of long-chain omega-3 fatty acids (EPA and DHA). It contains zero carbohydrates, resulting in a glycemic index and load of zero. Its high fat content slows gastric emptying slightly compared to lean fish, promoting moderate satiety.

Varieties: Atlantic mackerel · Pacific mackerel · King mackerel · Spanish mackerel · Chub mackerel

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Per 100g

Nutrition breakdown

Macro balance and key metrics at a glance.

Energy

262kcal

Density 2.62 kcal/g

Protein

24g

Carbs

0g

Fat

17.8g

Fiber

0g

Sugar

0 g

Sodium

72 mg

Potassium

314 mg

Glycemic index

0

Glycemic load

0

Water content

63.5%

Standout compounds

Nutrient highlights

  • Omega-3 Fatty Acids (EPA/DHA)

    high

    Reduces inflammation and supports heart and brain health

  • Vitamin B12

    high

    Essential for nerve function and red blood cell formation

  • Vitamin D

    high

    Supports bone health and immune function

  • Selenium

    moderate

    Acts as an antioxidant and supports thyroid function

Wellness map

Health scores & processing

Weight loss
75
Satiety
80
Blood sugar
100
Gut health
65
Heart health
95
Fitness
85
Processing
100

NOVA processing scale

1
Min
2
3
4
Ultra

Minimally processed · Whole food

Fresh or frozen mackerel is an unprocessed whole food. Canned or smoked versions may contain added sodium or smoke flavorings but generally remain processed culinary ingredients or processed foods (NOVA 3).

Diet compatibility

  • Weight loss
  • Muscle gain
  • Diabetes
  • Gut health
  • Low carb
  • High protein
  • Heart health

Relative standing

Food rankings

Qualitative ranks compared to similar whole foods.

  • Satietygood
  • Blood sugarexcellent
  • Nutrient densityexcellent
  • Fitness fuelgood
  • Processing qualityexcellent

Eat with confidence

Food safety profile

Atlantic and Pacific mackerel are low in mercury and safe for regular consumption. King mackerel should be avoided due to high mercury levels. Improperly stored mackerel can cause scombroid poisoning due to histamine buildup.

80safety

Evidence confidence 90%

  • Pesticideslow
  • Antibioticslow
  • Heavy metalsmoderate
  • Contaminationmoderate

Watch for

  • Mercury
  • Histamine
  • PCBs

Safer choices

Atlantic mackerel or Pacific mackerel instead of King mackerel.

Prep tips

Keep strictly refrigerated or frozen to prevent histamine formation. Cook to an internal temperature of 63°C (145°F).

King mackerel is on the FDA's 'do not eat' list for pregnant women due to high mercury. Atlantic and Pacific mackerel are classified as 'best choices'.

Deep dive

Health analysis

How this food may fit different goals and preparation choices.

  1. Weight loss

    High protein and omega-3 fats increase satiety, though its caloric density requires portion awareness compared to lean white fish.

  2. Blood sugar

    Contains zero carbohydrates, causing no glycemic spike and making it ideal for blood sugar regulation.

  3. Fitness & energy

    Provides high-quality protein for muscle repair and omega-3s that reduce exercise-induced inflammation.

  4. Gut health

    Lacks dietary fiber, but omega-3 fatty acids help reduce gut inflammation and support microbiome diversity.

  5. Processing quality

    Fresh or frozen mackerel is entirely unprocessed. Canned versions are minimally processed but often high in sodium.

  6. Food safety

    Choose Atlantic or Pacific varieties to minimize mercury exposure. Ensure proper cold chain storage to avoid scombroid fish poisoning.

  7. Common mistakes

    Confusing King mackerel with Atlantic mackerel, leading to unintended high mercury intake, or overcooking the lean flesh if using Pacific varieties.

  8. Best preparation

    Grilling, baking, or poaching preserve the healthy fats without adding excessive calories from heavy breading or frying.

Practical guide

Best use cases

When and how this food fits real eating patterns.

  • Heart-healthy dinner

    Provides over 100% of daily omega-3 needs in a single serving to support cardiovascular function.

  • Keto meal staple

    Zero carbs and high natural fats make it ideal for strict ketogenic diets.

  • Post-workout recovery

    Delivers complete protein for muscle repair alongside anti-inflammatory omega-3s.

  • Vitamin B12 boost

    A single serving provides over 300% of the daily value for B12, supporting nerve function and energy.

Balance sheet

Pros & cons

Upsides

  • Exceptionally high in anti-inflammatory omega-3 fatty acids
  • Zero carbohydrates, causing no blood sugar spikes
  • Rich source of vitamin B12 and vitamin D
  • High-quality complete protein for muscle maintenance
  • Atlantic and Pacific varieties are low in mercury
  • Relatively affordable, especially when canned

Trade-offs

  • Strong fishy flavor is off-putting to some palates
  • High fat content makes it more calorie-dense than lean white fish
  • King mackerel has dangerously high mercury levels
  • Prone to histamine buildup (scombroid poisoning) if improperly refrigerated
  • Canned versions can be very high in sodium

Fit check

Who is it for?

Great match

  • heart health support
  • ketogenic and low-carb diets
  • omega-3 supplementation via whole foods
  • vitamin B12 deficiency prevention

Consider alternatives

  • those averse to strong fish flavors
  • strict calorie counting without tracking fats
  • pregnant women (if King mackerel is consumed)
  • low-sodium diets (if eating canned varieties)

Side by side

How it compares

Open the full head-to-head analysis for nutrition, safety, and practical tradeoffs.

  • Mackerel

    This food

    Mackerel

    VS90% alike
    Salmon

    Compare with

    Salmon

    Salmon offers slightly more omega-3s and a milder flavor, while mackerel provides more vitamin B12 and is often cheaper.

    Salmon has a milder flavor and slightly more omega-3s, while mackerel is richer in B12 and often more affordable.

    Mackerel vs Salmon
  • Mackerel

    This food

    Mackerel

    VS95% alike
    Sardines

    Compare with

    Sardines

    Sardines are eaten with bones for calcium and are lower in mercury, while mackerel offers larger fillets and a meatier texture.

    Sardines provide more calcium and less mercury, while mackerel offers a meatier texture and higher B12.

    Mackerel vs Sardines
  • Mackerel

    This food

    Mackerel

    VS80% alike
    Tuna

    Compare with

    Tuna

    Tuna is leaner with higher protein per calorie, while mackerel is fattier with significantly more omega-3s and vitamin D.

    Tuna is leaner and higher in protein per calorie, while mackerel is richer in omega-3 fats and vitamin D.

    Mackerel vs Tuna
  • Mackerel

    This food

    Mackerel

    VS60% alike
    Cod

    Compare with

    Cod

    Cod is a low-calorie lean protein, while mackerel is calorie-dense but packed with omega-3s and fat-soluble vitamins.

    Cod is much lower in calories and fat, making it better for cutting, while mackerel dominates in omega-3s and vitamin D.

    Mackerel vs Cod
  • Mackerel

    This food

    Mackerel

    VS95% alike
    Herring

    Compare with

    Herring

    Herring and mackerel are nutritionally similar, but mackerel generally has slightly more vitamin D and a richer flavor.

    Herring and mackerel are closely matched omega-3 powerhouses, but mackerel offers slightly more vitamin D.

    Mackerel vs Herring
  • Mackerel

    This food

    Mackerel

    VS85% alike
    Trout

    Compare with

    Trout

    Trout has a milder flavor and is usually farmed, while mackerel is wild-caught with higher omega-3 content.

    Trout offers a milder taste and is often farmed, while mackerel is wild-caught with more omega-3s and B12.

    Mackerel vs Trout
  • Mackerel

    This food

    Mackerel

    VS75% alike
    Anchovies

    Compare with

    Anchovies

    Anchovies are used in small amounts as flavoring and are very high in calcium, while mackerel is eaten as a main protein dish.

    Anchovies are high in calcium and used as flavor enhancers, while mackerel is a standalone protein with more omega-3s per serving.

    Mackerel vs Anchovies
  • Mackerel

    This food

    Mackerel

    VS65% alike
    Swordfish

    Compare with

    Swordfish

    Swordfish has a meaty texture and mild flavor, but it is very high in mercury, making mackerel (Atlantic) the safer regular choice.

    Atlantic mackerel is much lower in mercury and higher in omega-3s than swordfish, making it a safer and healthier choice.

    Mackerel vs Swordfish
  • Mackerel

    This food

    Mackerel

    VS50% alike
    Tilapia

    Compare with

    Tilapia

    Tilapia is a lean, mild, low-calorie fish, whereas mackerel is high in calories, healthy fats, and omega-3s.

    Tilapia is a low-calorie lean fish, while mackerel is a high-omega-3 fatty fish with significantly more nutritional value per bite.

    Mackerel vs Tilapia
  • Mackerel

    This food

    Mackerel

    VS55% alike
    Chicken Breast

    Compare with

    Chicken Breast

    Chicken breast is lower in calories and fat, while mackerel provides essential omega-3s and vitamin D that chicken lacks.

    Chicken breast is leaner and better for pure calorie counting, but mackerel provides essential omega-3s and vitamin D.

    Mackerel vs Chicken Breast

Common questions

FAQ

Answers aligned with how people search for this food.

  • Is mackerel high in mercury?

    Atlantic and Pacific mackerel are low in mercury and safe for regular consumption, but King mackerel is very high in mercury and should be avoided, especially by pregnant women.

  • Is mackerel good for weight loss?

    Yes, its high protein and healthy fats increase fullness, though it is more calorie-dense than lean white fish so portion control is necessary.

  • Is canned mackerel healthy?

    Yes, canned mackerel retains its omega-3s and protein, but you should check the label for added sodium and rinse it if on a low-salt diet.

  • Which is healthier, mackerel or salmon?

    Both are excellent sources of omega-3s. Mackerel typically has more vitamin B12 and vitamin D, while salmon is slightly higher in omega-3s depending on the species.

  • Can diabetics eat mackerel?

    Yes, mackerel has zero carbohydrates and will not raise blood sugar, while its healthy fats improve insulin sensitivity.

  • What does mackerel taste like?

    Mackerel has a rich, pronounced fish flavor and oily texture, much stronger than mild white fish like cod or tilapia.

  • How should I cook mackerel?

    Grilling, broiling, or baking are best. The high fat content keeps it moist and prevents it from drying out under high heat.

  • Can you eat mackerel every day?

    While Atlantic mackerel is low in mercury, varying your seafood intake is recommended to balance nutrient profiles and minimize any contaminant accumulation.

Transparency

Data confidence

Estimated confidence for nutrition data, interpretation, safety notes, and comparisons.

95

Nutrition data

95

Health analysis

90

Food safety

90

Comparisons