Herring is one of the most nutrient-dense small fatty fish available in an animal-based diet, delivering a substantial caloric load from both protein and fat in a compact portion. Its fat content is predominantly unsaturated, with high concentrations of the long-chain omega-3 fatty acids EPA and DHA, which are critical for brain structure, cardiovascular function, and the modulation of systemic inflammatory responses. Herring is among the richest dietary sources of vitamin D3, a fat-soluble hormone precursor that influences calcium absorption, immune function, gene expression, and musculoskeletal health. It provides vitamin B12 at levels that can meet or exceed daily requirements in a single serving, supporting the methylation cycle, red blood cell formation, and central nervous system maintenance. Selenium in herring contributes to glutathione peroxidase activity, protecting cells from oxidative stress and supporting thyroid hormone conversion. The complete amino acid profile of herring supports lean body mass maintenance, enzyme synthesis, and connective tissue repair. Choline is present in herring and is essential for phospholipid synthesis, liver function, and acetylcholine production in neural communication. Iodine content supports the thyroid gland's production of T3 and T4 hormones, which regulate basal metabolic rate and thermoregulation. Herring provides coenzyme Q10, which supports mitochondrial electron transport and cellular energy production, particularly in cardiac muscle. The fat-soluble vitamin A content contributes to epithelial cell integrity, immune surveillance, and retinal function. Phosphorus and calcium are both present in notable amounts, particularly when herring is consumed with bones, directly supporting skeletal mineral density. The caloric density of herring, combined with its fat content, promotes robust satiety signaling through peptide YY and cholecystokinin release. Its overall nutrient profile makes it one of the most biologically complete single-food sources within a carnivore framework.

• Cholesterol: 60mg (supports hormone synthesis, cellular structure, and fat-soluble vitamin absorption)
• Sodium: 90mg (contributes to fluid regulation, nerve conduction, and muscle contraction)
• Potassium: 327mg (supports electrolyte balance, cardiovascular function, and muscular activity)
• Selenium: 37mcg (involved in antioxidant enzyme systems, thyroid hormone metabolism, and immune defense)
• Phosphorus: 236mg (contributes to bone mineralization, ATP production, and cellular repair)
• Magnesium: 32mg (supports ATP synthesis, muscle contraction, and enzymatic function)
• Calcium: 57mg (involved in bone structure, nerve signaling, and muscle contraction)
• Iron: 1.1mg (supports oxygen transport, red blood cell production, and metabolic energy)
• Zinc: 0.99mg (contributes to immune signaling, enzyme activity, and tissue repair)
• Niacin (B3): 3.2mg (involved in cellular energy metabolism and nervous system support)
• Vitamin B6: 0.3mg (supports protein metabolism and neurotransmitter production)
• Riboflavin (B2): 0.23mg (contributes to energy production and cellular growth)
• Pantothenic Acid (B5): 0.65mg (involved in fat metabolism and hormone synthesis)
• Vitamin B12: 13.67mcg (supports neurological function, DNA synthesis, and red blood cell formation)
• Vitamin D: 167 IU (contributes to calcium absorption, immune modulation, and bone metabolism)
• Vitamin E: 1.07mg (supports antioxidant protection and cellular membrane integrity)
• Thiamin (B1): 0.09mg (involved in carbohydrate metabolism and nervous system support)
• Omega-3 fatty acids (EPA+DHA): 1.2g (support cardiovascular function, neurological health, and inflammatory balance)

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