Mackerel
Overview
Mackerel is an oily fish providing complete high-quality protein together with very high levels of long-chain omega-3 fatty acids EPA and DHA, as well as vitamin B12, selenium, and other trace minerals. These intrinsic compounds support neuronal membrane phospholipid composition, mitochondrial oxidative phosphorylation, and antioxidant enzyme systems [1]. Among commonly eaten fish, mackerel is one of the richer sources of EPA and DHA per 100 g, making small portions nutritionally dense for marine omega-3 intake [1].
Within the BRAIN Diet framework, mackerel functions as a high-omega-3 oily fish that can be rotated with salmon, sardines, and herring rather than used as the sole source. Its protein is highly digestible, and DIAAS data for similar oily fish indicate excellent indispensable amino acid coverage [2].
Key Nutritional Highlights
- Provides complete, highly digestible protein.
- Commonly contributes selenium, iodine, and vitamin B12, though levels vary by species.
- EPA/DHA content is highly species-dependent; oily fish are usually higher than lean fish or shellfish.
- Often lower in saturated fat than many fatty red-meat patterns when minimally processed.
- Nutritional profile and risk context depend on processing method (fresh vs salted/smoked/cured).
Food Context
Sourcing
- Choose mackerel from well-managed fisheries that monitor stock status and contaminant levels; smaller pelagic species such as mackerel typically accumulate less mercury than large predatory fish.
- Where possible, prefer products with transparent sustainability certification or independent fishery assessments to support long-term availability and ecosystem health.
Preparation
- Prefer gentle or moist-heat cooking methods (baking, steaming, stewing) to help preserve EPA/DHA and reduce lipid oxidation compared with intense high-temperature pan-frying or grilling.
- Use mackerel in modest portions within meals that also contain vegetables and whole grains, so the oily fish contributes marine omega-3s and B12 without dominating total energy or saturated fat intake.
Essential Amino Acid Profile
This food provides a complete essential amino acid profile typical of animal proteins, with high digestibility and bioavailability.
Recipes
Nutrient Tables (per 100 g)
Core nutrients
| Nutrient | Amount per 100 g | % RDA per 100 g |
|---|---|---|
| Energy | 305 kcal | — |
| Protein | 18.5 g | — |
| Total fat | 25.1 g | — |
| Saturated fat | 7.1 g | — |
| Carbohydrates | 0 g | — |
| Fibre | 0 g | — |
Key micronutrients
| Nutrient | Amount per 100 g | % RDA per 100 g |
|---|---|---|
| Iron | 1.4 mg | 7.8% |
| Zinc | 1.1 mg | 10% |
| Magnesium | 60 mg | 14.3% |
| Selenium | 73.4 µg | 133.5% |
| Calcium | 66 mg | 6.6% |
| Potassium | 520 mg | 15.3% |
| Choline | 101.6 mg | 18.5% |
| Folate | 15 µg | 3.8% |
| Vitamin B12 | 0 µg | 0% |
| Vitamin B6 | 0.4 mg | 24.1% |
Bioactive compounds
Values below are often from specialist compositional databases or literature, not the standard USDA panel. Asterisks (*) refer to source notes at the bottom of this section.
| Compound / class | Amount per 100 g | Notes |
|---|---|---|
| EPA | 1619 mg | — |
| DHA | 2965 mg | — |
Note: Bioactive-compound values vary substantially by cultivar, species, cocoa or oil percentage, processing, and brand formulation. Show quantitative values only where a defensible source exists; otherwise prefer qualitative presence statements or ranges in source notes.
Substances
Substances in this food: editorial (Overview / literature) plus analytical (nutrition table).
14 substances in this food
Coenzyme Q10 (CoQ10)
Electron transport chain cofactor and antioxidant relevant to mitochondrial function
DHA (Docosahexaenoic Acid)
Accounts for ~10–15% of total brain fatty acids, 20–30% of neuronal phospholipids (PE, PS), and >90% of brain omega-3 PUFA; critical for membrane fluidity, synaptic vesicle fusion, neurodevelopment
EPA (Eicosapentaenoic Acid)
Potent anti-inflammatory; precursor to E-series resolvins; modulates dopamine and serotonin signalling
Taurine
Osmoregulator; GABA modulation; mitochondrial membrane stabilizer; anti-inflammatory
Vitamin D
Neurotrophic and immune modulation; calcium homeostasis
Iron
Oxygen transport; dopamine synthesis (tyrosine hydroxylase cofactor)
Zinc
Cofactor in neurotransmission and antioxidant enzymes; dopamine modulation
Magnesium
Enzymatic cofactor (>300 reactions); neurotransmitters; mitochondria; redox balance
Selenium
Antioxidant enzyme cofactor (GPx); supports redox balance
Calcium
Bone health; neurotransmission; interacts with vitamin D and K2
Potassium
Electrolyte for nerve transmission, muscle function, and blood pressure regulation
Choline
Acetylcholine precursor; methyl donor; phospholipid synthesis for membranes
Vitamin B9 (Folate; 5-MTHF)
One-carbon metabolism; methylation; homocysteine recycling
Vitamin B6 (Pyridoxine → PLP)
PLP cofactor for neurotransmitter synthesis; relies on brain PDXK activation
References
These references link to the BRAIN Diet bibliography page, where the full citation and DOI/external source link are provided.