Pet Cod Liver Oil Liquid Plain, 16 oz
Nordic Naturals Pet Cod Liver Oil Liquid is a plain, unflavored fish oil derived from wild Arctic cod, providing omega-3 fatty acids (EPA and DHA) along with naturally occurring vitamins A and D.
May be a fit for
- Pets needing omega-3 fatty acids for coat and skin support
- Dog and cat owners seeking cod liver oil with vitamins A and D
- Multi-pet households looking for an unflavored liquid fish oil
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Nordic Naturals Pet Cod Liver Oil Liquid is a plain, unflavored fish oil derived from wild Arctic cod, providing omega-3 fatty acids (EPA and DHA) along with naturally occurring vitamins A and D. Formulated specifically for pets, it supports healthy skin and coat, joint comfort, and immune function in dogs and cats.
Why It's Worth Considering: Nordic Naturals uses a triglyceride-form oil, which research suggests is more readily absorbed than ethyl ester forms, and third-party tests for purity and freshness.
Nordic Naturals · 16 ozMake it part of your routine.
Add to your dog's food, or serve by itself, daily. 10–19 lb: 0.25 teaspoon (approximately 1.25 mL); 20–39 lb: 0.5 teaspoon (approximately 2.5 mL); 40–59 lb: 1 teaspoon (approximately 5 mL); 60–79 lb: 1.5 teaspoons (approximately 7.5 mL); 80–110 lb: 2 teaspoons (approximately 10 mL); 111–130 lb: 2.5 teaspoons (approximately 12.5 mL). For dogs 2–10 lb, use the manufacturer's smaller-dog product. For dogs over 130 lb, consult your veterinarian. Do not exceed suggested daily use without consulting your veterinarian.
Important cautions & interactions
Product details
Supplement facts & complete label
Guaranteed analysis per 1 teaspoon (approximately 5 mL / 4.6 g cod liver oil): crude fat (min.) 98.3%; moisture (max.) 0.2%; eicosapentaenoic acid (EPA) (min.) 7%; docosahexaenoic acid (DHA) (min.) 10%; total omega-3 fatty acids (min.) 22%. Includes 345 mg EPA, 460 mg DHA, and 1,048 mg total omega-3s in triglyceride form. Calorie content (calculated): ME 8,483 kcal/kg, 40 kcal/teaspoon.
Ingredients: cod liver oil, mixed tocopherols (a preservative).
Label directions
Add to your dog's food, or serve by itself, daily. 10–19 lb: 0.25 teaspoon (approximately 1.25 mL); 20–39 lb: 0.5 teaspoon (approximately 2.5 mL); 40–59 lb: 1 teaspoon (approximately 5 mL); 60–79 lb: 1.5 teaspoons (approximately 7.5 mL); 80–110 lb: 2 teaspoons (approximately 10 mL); 111–130 lb: 2.5 teaspoons (approximately 12.5 mL). For dogs 2–10 lb, use the manufacturer's smaller-dog product. For dogs over 130 lb, consult your veterinarian. Do not exceed suggested daily use without consulting your veterinarian.
Label cautions
For intermittent or supplemental feeding only. Keep out of reach of children and pets. Store in a cool, dry place away from sunlight. Do not use if the tamper-evident seal is broken or missing. Refrigerate after opening and use within 3 months. Consult your veterinarian before use if your dog has a known medical condition or takes medication. In case of overconsumption, consult your veterinarian immediately.
Source: Nordic Naturals manufacturer label · September 06, 2026. Formulas and labels can change. Check the packaging you receive.
Who it may suit
May be a fit for
- Pets needing omega-3 fatty acids for coat and skin support
- Dog and cat owners seeking cod liver oil with vitamins A and D
- Multi-pet households looking for an unflavored liquid fish oil
- Animals on low-fat diets where additional EPA and DHA supplementation is warranted
Considerations
- Fish/shellfish allergy (use algal omega-3 instead)
- Taking blood thinners (consult physician — may enhance effect)
- Scheduled surgery within 2 weeks (may increase bleeding)
- Bleeding disorders
What to expect over time
Cell Membrane Integration
EPA/DHA incorporate into cell membranes
Inflammation Markers
Measurable CRP reduction
Joint & Mood
Reduced joint stiffness, improved mood
Cardiovascular
Triglycerides reduced 15-30%
Based on clinical research on EPA/DHA supplementation at therapeutic doses (2-4g combined EPA+DHA).
Compare the options
Compare Omega-3 Sources
Fish Oil vs Krill vs Algal vs Cod Liver
| Feature | Fish Oil (this) | Krill Oil | Algal Oil | Cod Liver Oil |
|---|---|---|---|---|
| EPA+DHA Content | High (concentrated) | Moderate | Moderate-High | Moderate + Vit A/D |
| Absorption | Good (triglyceride form) | Excellent (phospholipid) | Good | Good + fat-soluble vitamins |
| Best For | Therapeutic dose, heart/brain | General wellness | Vegan option | Vitamin A+D + omega-3 |
| Sustainability | Varies by brand | Sustainable harvest | Most sustainable | Traditional, sustainable |
| Burp Factor | Low (if enteric coated) | Very low | None | Moderate |
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A few useful answers.
Research & further reading
More category questions
How much fish oil should I take daily?
For general health, 1-2g of combined EPA+DHA daily. For therapeutic use (triglycerides, inflammation, mood), 2-4g combined EPA+DHA. Check the label for EPA+DHA content per serving — many fish oils have only 300mg per 1000mg capsule, requiring 6-8 capsules for a therapeutic dose. Concentrated formulas provide 600-900mg per capsule.
What is the difference between EPA and DHA?
EPA (eicosapentaenoic acid) is primarily anti-inflammatory — best for joint pain, cardiovascular health, and mood disorders. DHA (docosahexaenoic acid) is structural — it comprises 40% of brain polyunsaturated fats and is critical for cognitive function, eye health, and fetal development. Most people benefit from both; higher EPA for inflammation, higher DHA for brain health.
Does fish oil cause fishy burps?
Low-quality fish oil can cause fishy aftertaste and burping. Solutions: take with food, choose enteric-coated capsules, refrigerate the bottle (slows breakdown), or use a concentrated triglyceride-form fish oil (higher quality = less burping). If you still experience burps, the oil may be oxidized — check the expiration date and smell the capsule.
Is krill oil better than fish oil?
Krill oil has better absorption per gram (phospholipid form) and contains astaxanthin (antioxidant), but it's significantly more expensive per mg of EPA+DHA. For therapeutic doses (2-4g EPA+DHA), fish oil is more practical and cost-effective. Krill oil is a good choice for general wellness at maintenance doses.
Can I take fish oil with blood thinners?
Fish oil has mild blood-thinning properties. If you're taking warfarin, aspirin, or other anticoagulants, consult your physician before starting high-dose omega-3. At standard doses (1-2g), the risk is low, but your INR may need monitoring. Stop fish oil 1-2 weeks before scheduled surgery.
How do I choose a quality fish oil?
Look for: third-party tested for heavy metals and oxidation (IFOS 5-star rated), triglyceride form (not ethyl ester), high EPA+DHA per capsule (600mg+ combined), and molecular distillation for purity. The Gabriel Score evaluates all of these quality signals automatically.
Supplement information is provided for education and is not a substitute for personalized medical advice. Supplements are not intended to diagnose, treat, cure or prevent disease. Read the current product label before use.