Mackerel is a high-fat, high-protein fish recognized for exceptional omega-3 fatty acid content, particularly EPA and DHA, placing it among the most concentrated marine sources of these essential lipids. The omega-3 to omega-6 ratio in mackerel is highly favorable, supporting the reduction of pro-inflammatory eicosanoid production and promoting cardiovascular and neurological health. Its caloric density is substantial, with fat and protein contributing roughly equally depending on the species, making it a highly satiating food that supports sustained energy availability. Mackerel delivers one of the highest natural concentrations of vitamin D3 found in any food, supporting calcium homeostasis, immune modulation, and hormonal signaling pathways. Vitamin B12 content is exceptional, often exceeding daily requirements in a single serving, and supports neurological integrity, red blood cell synthesis, and homocysteine regulation. Selenium is present in high concentrations, supporting thyroid hormone metabolism and antioxidant enzyme systems including glutathione peroxidase. Niacin and other B vitamins in mackerel support the NAD+/NADH redox cycle, which is central to mitochondrial energy production across every cell type. Coenzyme Q10 is found in meaningful quantities in mackerel, contributing to electron transport chain efficiency and cardiac muscle function. The complete protein profile provides all indispensable amino acids, making it directly supportive of muscle protein synthesis, enzyme production, and nitrogen balance. Phosphorus in mackerel works alongside calcium to maintain bone matrix integrity and contributes to the phosphorylation reactions underlying ATP synthesis. Iodine supports thyroid function and the metabolic regulation governed by thyroid hormones. The fat content of mackerel aids in the absorption of fat-soluble vitamins A, D, E, and K consumed alongside it. Vitamin A precursors support cellular differentiation and immune function. Mackerel's overall nutrient architecture makes it a cornerstone protein for carnivore and animal-based dietary patterns.

• Cholesterol: 70mg (supports hormone production, cellular membrane structure, and fat-soluble vitamin transport)
• Sodium: 90mg (contributes to fluid balance, nerve signaling, and muscle contraction)
• Potassium: 314mg (supports electrolyte function, cardiovascular regulation, and muscular activity)
• Selenium: 44mcg (involved in antioxidant enzyme systems, thyroid hormone metabolism, and immune support)
• Phosphorus: 217mg (contributes to bone structure, ATP energy production, and cellular repair)
• Magnesium: 76mg (supports ATP synthesis, muscle function, and over 300 enzymatic processes)
• Iron: 1.63mg (involved in oxygen transport, red blood cell production, and metabolic energy)
• Zinc: 0.63mg (contributes to immune signaling, enzyme function, and tissue repair)
• Niacin (B3): 9.1mg (involved in cellular energy metabolism, NAD production, and nervous system support)
• Vitamin B6: 0.4mg (supports protein metabolism, neurotransmitter synthesis, and amino acid processing)
• Riboflavin (B2): 0.31mg (contributes to energy production and cellular growth)
• Thiamin (B1): 0.18mg (involved in carbohydrate metabolism and nervous system support)
• Pantothenic Acid (B5): 0.86mg (supports fat metabolism and hormone synthesis)
• Vitamin B12: 8.7mcg (contributes to neurological function, DNA synthesis, and red blood cell production)
• Vitamin D: 643 IU (supports calcium absorption, immune modulation, and musculoskeletal function)
• Vitamin E: 1.5mg (contributes to antioxidant protection and cellular membrane integrity)
• Vitamin A: 167 IU (supports vision, immune function, and epithelial tissue maintenance)
• Omega-3 fatty acids (EPA+DHA): 2.5g (support cardiovascular function, neurological health, and cellular signaling)

These values are approximate and can vary based on factors such as the specific cut of beef and cooking method.