Cod

Variants (2)

Nutrition · per ~85 g serving · ≈ a palm-sized piece (~3 oz)

Score · 81/100

Overview

Cod (Gadus morhua) is a cold-water demersal fish harvested globally, with historical significance in Mediterranean and Northern European diets. Nutritionally, cod exemplifies an optimal protein source for longevity-focused nutrition: 22.8g of complete protein per 100g with only 0.9g fat and 105 calories, making it ideal for lean muscle maintenance without caloric excess. Its iodine content (158 mcg per 100g) covers ~105% of daily requirements, critical for thyroid hormone synthesis—essential for metabolic rate, cognitive function, and healthy aging. The selenium content (46.8 mcg) provides antioxidant defense through glutathione peroxidase activation, protecting against oxidative stress and inflammation associated with age-related diseases. Cod's niacin (vitamin B3) supports NAD+ metabolism, which declines with age and influences mitochondrial function, DNA repair, and circadian rhythm regulation. Phosphorus and B12 further support bone mineralization and neurological health. Wild-caught cod offers superior omega-3 to omega-6 ratios compared to farmed varieties. The white flesh is easily digestible, making it suitable for all ages and those with compromised gastrointestinal function.

Health Benefits (5)

• Supports thyroid function and metabolic rate through exceptional iodine density

  strong
  Iodine is the core cofactor in thyroid peroxidase enzyme, which synthesizes T3 and T4 hormones that regulate metabolic rate, thermogenesis, and cellular energy production—declining with age and linked to longevity outcomes
• Promotes lean muscle mass maintenance with minimal metabolic cost

  strong
  Complete protein profile with all essential amino acids, particularly leucine, stimulates mTOR-mediated muscle protein synthesis; low caloric density prevents energy surplus that accelerates aging
• Enhances antioxidant defense and reduces age-related inflammation

  strong
  Selenium is incorporated into selenoproteins (glutathione peroxidase, thioredoxin reductase) that neutralize reactive oxygen species and suppress pro-inflammatory signaling
• Supports NAD+ metabolism and mitochondrial longevity pathways

  moderate
  Niacin (B3) is a precursor to NAD+, which declines ~50% with age and is essential for sirtuin and PARP activation—regulators of DNA repair, autophagy, and metabolic health
• Maintains neurological and cognitive health in aging

  strong
  B12 supports myelin formation and methylation cycles; phosphorus is structural component of phospholipids in neuronal membranes; iodine is required for central nervous system development and function throughout life

Food Pairings

• ·Pair with leafy greens (spinach, kale) because their vitamin K and folate enhance B12 methylation cycles, optimizing neurological and homocysteine metabolism
• ·Pair with citrus (lemon, lime) because vitamin C enhances non-heme iron absorption from any accompanying plant foods and potentiates selenium bioavailability
• ·Pair with cruciferous vegetables (broccoli, Brussels sprouts) because their glucosinolates synergize with selenium to upregulate phase II detoxification enzymes
• ·Pair with olive oil because polyphenols (oleuropein, hydroxytyrosol) have anti-inflammatory effects that complement cod's selenium-based antioxidant defense
• ·Pair with seaweed or sea vegetables because their additional iodine creates redundancy for thyroid optimization without excess; their polysaccharides support gut microbiota diversity

Practical Tips

• ·Choose wild-caught Atlantic or Pacific cod over farmed when possible; wild varieties have superior micronutrient density and lower mercury accumulation due to shorter bioaccumulation timeframes
• ·Consume 100-150g servings (1-2 fillets) 2-3 times weekly to achieve iodine sufficiency without excessive mercury exposure; this frequency optimizes benefit-to-risk ratio
• ·Prepare via baking, steaming, or poaching rather than deep-frying to preserve heat-sensitive B vitamins and minimize oxidized fat formation that can increase inflammation
• ·Store fresh cod at 32-38°F and use within 1-2 days; frozen cod retains nutrients for 6 months and is nutritionally equivalent to fresh, offering convenience and cost savings
• ·Consume the skin and any bones (if present in canned preparations) to maximize phosphorus intake for skeletal and dental mineralization

Optimal Timing

Cod's high protein and complete amino acid profile supports muscle protein synthesis throughout the day; its lack of carbohydrates means no glycemic impact timing. Midday and evening meals allow optimal nutrient partitioning for tissue maintenance.

Cod can be consumed during fasting windows (as a break-fast) without disrupting metabolic autophagy significantly due to minimal carbohydrate content, though protein does trigger mTOR slightly. Ideal as first meal post-fast to signal amino acid sufficiency to nutrient-sensing pathways.