# Wild-Caught Fish Oil (Salmo salar)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/wild-caught-fish-oil
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-04
**Evidence Score:** 2 / 10
**Category:** Protein
**Also Known As:** Atlantic salmon oil, Salmo salar oil, Wild salmon omega-3 oil, Marine omega-3 oil, Wild-caught Atlantic salmon extract, EPA/DHA from wild salmon, Cold-water fish oil, Norwegian salmon oil, Scottish salmon oil, North Atlantic salmon oil

## Overview

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](/ingredients/condition/heart-health) function. These fatty acids compete with arachidonic acid for cyclooxygenase and lipoxygenase enzymes, shifting eicosanoid production toward less inflammatory [prostaglandin](/ingredients/condition/inflammation)s and leukotrienes.

## 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)

## Mechanism of Action

EPA and DHA incorporate into cell membrane phospholipids, displacing arachidonic acid and reducing synthesis of pro-inflammatory eicosanoids such as [prostaglandin](/ingredients/condition/inflammation) 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.

## 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](/ingredients/condition/inflammation) benefits in autoimmune and rheumatologic conditions exists but is more heterogeneous, with effect sizes varying considerably across study populations and dosing protocols. Overall, [cardiovascular](/ingredients/condition/heart-health) 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](/ingredients/condition/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](/ingredients/condition/gut-health) 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](/ingredients/condition/inflammation) and [cardiovascular](/ingredients/condition/heart-health) benefits

## Dosage & Preparation

Clinically studied dosages include: 1.08g/day EPA for [cardiovascular](/ingredients/condition/heart-health) 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.

## Safety & Drug 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](/ingredients/condition/heart-health), 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.

## 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.

## 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](/ingredients/condition/heart-health) and [inflammatory](/ingredients/condition/inflammation) conditions has been studied extensively since the late 20th century.

## Synergistic Combinations

Vitamin E, Coenzyme Q10, Astaxanthin, Vitamin D3, Turmeric

## Frequently Asked Questions

### How much wild-caught fish oil should I take per day for heart health?

The GISSI-Prevenzione trial used 1g/day of combined EPA+DHA and demonstrated a 29% reduction in cardiac events in post-MI patients. The American Heart Association endorses 1g/day EPA+DHA for secondary cardiovascular prevention, while higher doses of 2-4g/day are used clinically for triglyceride reduction under physician supervision.

### What is the difference between EPA and DHA in fish oil?

EPA (eicosapentaenoic acid) is the primary anti-inflammatory fatty acid, reducing prostaglandin E2 and leukotriene B4 synthesis via COX and 5-LOX inhibition, and is most associated with cardiovascular and mood benefits. DHA (docosahexaenoic acid) preferentially accumulates in brain and retinal tissue, supporting neuronal membrane fluidity and synaptic signaling, and is critical for fetal brain and eye development during pregnancy.

### Can wild-caught fish oil reduce triglycerides?

Yes, EPA and DHA reduce hepatic triglyceride synthesis by activating PPARα, which upregulates fatty acid beta-oxidation and downregulates SREBP-1c-mediated lipogenesis. Prescription-grade omega-3 formulations delivering 4g/day of EPA+DHA (e.g., Vascepa, Lovaza) are FDA-approved and have demonstrated triglyceride reductions of 20-50% in hypertriglyceridemic patients in controlled trials.

### Is wild-caught fish oil safe to take during pregnancy?

Omega-3 supplementation in pregnancy has been studied extensively; a multicenter RCT (PMID: 10740336) using approximately 2.7g/day EPA+DHA found a 36% reduction in pre-term delivery recurrence with no significant adverse effects reported. DHA is essential for fetal brain and retinal development, and standard prenatal doses of 200-600mg/day DHA are broadly considered safe, though doses exceeding 3g/day should be discussed with an obstetrician.

### Does wild-caught fish oil interact with blood thinners like warfarin?

Fish oil at doses above 3g/day EPA+DHA inhibits platelet aggregation by reducing thromboxane A2 synthesis and may potentiate the anticoagulant effect of warfarin, increasing INR and bleeding risk. Patients on warfarin, aspirin, clopidogrel, or other anticoagulants should inform their physician before starting high-dose fish oil, and INR monitoring may need to be more frequent during supplementation.

### What is the evidence that wild-caught fish oil prevents heart attacks in people who have already had one?

Clinical trials demonstrate strong evidence that wild-caught fish oil reduces cardiac events by 29% and nonfatal heart attacks by 49% in patients with a history of myocardial infarction (heart attack). This evidence comes from a rigorous randomized controlled trial, making it one of the most well-supported cardiovascular applications for fish oil supplementation. However, benefits appear most pronounced in post-MI populations rather than for primary prevention in healthy individuals.

### Can wild-caught fish oil help prevent premature birth if I've had a preterm delivery before?

Moderate evidence from multicenter randomized controlled trials shows that wild-caught fish oil supplementation decreases the recurrence risk of preterm delivery by 36% in women with a previous preterm birth. This makes it a potentially valuable intervention for pregnancy planning in women with this specific history. However, this benefit is specific to recurrence prevention rather than first-time preterm birth prevention, so individual medical consultation is essential.

### Does wild-caught fish oil help with lupus symptoms and disease management?

Moderate clinical evidence indicates that wild-caught fish oil improves disease activity scores and quality of life measures in patients with systemic lupus erythematosus (SLE). The omega-3 fatty acids in fish oil appear to have immunomodulatory effects that may help reduce inflammatory markers associated with lupus. Fish oil supplementation may serve as a complementary therapy alongside conventional lupus treatments, though it should not replace prescribed medical management.

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