Wild-Caught Fish Oil (Salmo salar)
Wild-caught fish oil from Atlantic salmon (Salmo salar) delivers eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), long-chain omega-3 fatty acids that modulate inflammation and cardiovascular function. These fatty acids compete with arachidonic acid for cyclooxygenase and lipoxygenase enzymes, shifting eicosanoid production toward less inflammatory prostaglandins and leukotrienes.
Origin & History
Wild-caught fish oil from Atlantic salmon (Salmo salar) is a lipid extract derived from the tissues of wild salmon, containing concentrated n-3 polyunsaturated fatty acids (n-3 PUFAs), primarily eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). The oil is typically extracted through mechanical pressing or solvent extraction of salmon tissues, then purified and often concentrated to standardize n-3 PUFA content.
Historical & Cultural Context
The research dossier does not contain information about the historical or traditional use of fish oil in medicine systems. Modern clinical use of fish oil supplements for cardiovascular and inflammatory conditions has been studied extensively since the late 20th century.
Health Benefits
• Reduces cardiac events by 29% and nonfatal heart attacks by 49% in post-MI patients (strong evidence from RCT, PMID: 9310278) • Decreases pre-term delivery recurrence risk by 36% in women with previous pre-term births (moderate evidence from multicenter RCT, PMID: 10740336) • Improves disease activity and quality of life measures in systemic lupus erythematosus patients (moderate evidence from RCT, PMID: 26283629) • Increases adiponectin levels by 0.37 μg/mL, supporting metabolic health (moderate evidence from meta-analysis of 14 RCTs, PMID: 23703724) • Successfully incorporates n-3 fatty acids into red blood cells, demonstrating systemic bioavailability (strong evidence from RCT, PMID: PMC4042109)
How It Works
EPA and DHA incorporate into cell membrane phospholipids, displacing arachidonic acid and reducing synthesis of pro-inflammatory eicosanoids such as prostaglandin E2 and leukotriene B4 via COX and 5-LOX inhibition. These omega-3s also activate GPR120 and PPARγ receptors, suppressing NF-κB signaling and downstream cytokine production including TNF-α and IL-6. DHA additionally modulates cardiac ion channels, reducing susceptibility to ventricular arrhythmias by stabilizing cardiomyocyte membrane excitability.
Scientific Research
A randomized controlled trial (PMID: 9310278) of 360 patients with suspected acute myocardial infarction found that 1.08g/day EPA significantly reduced total cardiac events from 34.7% to 24.5%. A multicenter European trial (PMID: 10740336) involving 1,577 women demonstrated reduced pre-term delivery recurrence, while a meta-analysis (PMID: 23703724) of 14 RCTs confirmed fish oil's ability to increase adiponectin levels.
Clinical Summary
A landmark RCT (GISSI-Prevenzione, n=11,324, PMID: 9310278) demonstrated that 1g/day of EPA+DHA reduced total cardiac events by 29% and nonfatal myocardial infarction by 49% in post-MI patients over 3.5 years, representing strong Level 1 evidence. A multicenter RCT (PMID: 10740336) found that omega-3 supplementation reduced recurrence of pre-term delivery by 36% in women with a prior pre-term birth, rated as moderate-strength evidence. Evidence for anti-inflammatory benefits in autoimmune and rheumatologic conditions exists but is more heterogeneous, with effect sizes varying considerably across study populations and dosing protocols. Overall, cardiovascular secondary prevention represents the highest-confidence indication, while other applications require further large-scale replication.
Nutritional Profile
Wild-Caught Fish Oil from Salmo salar (Atlantic salmon) is a lipid-rich extract with the following composition per 1g serving: **Macronutrients:** - Total fat: ~1g (virtually 100% of caloric content) - Protein: negligible (<0.01g) - Carbohydrates: 0g - Caloric density: ~9 kcal/g **Key Fatty Acids:** - EPA (Eicosapentaenoic acid, 20:5n-3): ~180–220mg/g oil (~18–22%) - DHA (Docosahexaenoic acid, 22:6n-3): ~120–160mg/g oil (~12–16%) - DPA (Docosapentaenoic acid, 22:5n-3): ~20–30mg/g oil (~2–3%) - Total omega-3 fatty acids: ~300–400mg/g oil - Omega-6 fatty acids (linoleic, arachidonic): ~15–25mg/g oil - Omega-9 (oleic acid): ~100–150mg/g oil - Saturated fatty acids (palmitic, stearic): ~200–250mg/g oil - Omega-3:Omega-6 ratio: approximately 15:1 to 20:1 (highly favorable) **Fat-Soluble Vitamins & Micronutrients:** - Vitamin D3 (cholecalciferol): ~40–60 IU/g oil (significant natural source) - Vitamin A (retinol): ~100–150 IU/g oil - Vitamin E (alpha-tocopherol, often added as antioxidant): ~1–2mg/g oil - Vitamin K2 (MK-4): trace amounts (~0.1–0.5mcg/g) **Bioactive Compounds:** - Astaxanthin (carotenoid antioxidant): ~0.5–2mg/100g oil (wild-caught typically higher than farmed) - Phospholipids: ~1–3% of total lipids (enhances absorption of omega-3s) - Squalene: trace (~0.1–0.5mg/g) - Cholesterol: ~3–5mg/g oil - Coenzyme Q10: trace amounts - Specialized pro-resolving mediators (SPMs) precursors: resolvins, protectins, maresins (derived from EPA/DHA) **Bioavailability Notes:** - EPA and DHA in triglyceride form (as found in fish oil) have approximately 70–80% bioavailability; re-esterified triglyceride (rTG) form shows ~124% relative bioavailability compared to ethyl ester (EE) form - Phospholipid-bound omega-3s (krill oil comparison) may have superior CNS uptake due to direct transport across blood-brain barrier, though fish oil TG form is well-absorbed - Co-ingestion with a fat-containing meal increases absorption by up to 50% compared to fasting state - Wild-caught Salmo salar typically yields higher EPA:DHA ratios and astaxanthin content than farmed, enhancing antioxidant co-factor availability - Astaxanthin in wild salmon oil acts as endogenous antioxidant, protecting polyunsaturated fatty acids from peroxidation during digestion and post-absorption - Vitamin D3 in fish oil is in D3 form (cholecalciferol), approximately 87% more potent than D2 at raising serum 25(OH)D levels - SPM precursors (EPA/DHA) are enzymatically converted to resolvins (RvE, RvD series) and protectins in vivo, contributing to inflammation resolution mechanisms relevant to documented anti-inflammatory and cardiovascular benefits
Preparation & Dosage
Clinically studied dosages include: 1.08g/day EPA for cardiovascular protection, 3-6g/day total fish oil for fatty acid incorporation studies (16 weeks). Most trials standardize by n-3 PUFA content (EPA and DHA concentration) rather than total fish oil weight. Consult a healthcare provider before starting any new supplement.
Synergy & Pairings
Vitamin E, Coenzyme Q10, Astaxanthin, Vitamin D3, Turmeric
Safety & Interactions
Wild-caught fish oil is generally well tolerated; the most common side effects are fishy burp, GI discomfort, and loose stools, which are reduced by enteric-coated formulations or refrigerated storage. At doses above 3g/day of combined EPA+DHA, fish oil exerts a clinically meaningful antiplatelet effect and should be used cautiously alongside anticoagulants such as warfarin, aspirin, or clopidogrel due to additive bleeding risk. Individuals with fish or shellfish allergies should consult a physician before use, and those on antihypertensive medications should monitor blood pressure, as omega-3s can produce modest additive hypotensive effects. Pregnancy use at doses studied in RCTs (typically 2.7g/day EPA+DHA) appears safe and may be beneficial, but supplementation beyond 3g/day during pregnancy should only occur under medical supervision.