Last update
2/26/2026
Reviewed By
Overview
SCIENTIFIC SCORE
Possibly Effective
Based on 50 Researches
7.3
USERS' SCORE
Good
Based on 2 Reviews
8.2
Supplement Facts
Serving Size: 1 Soft Gel
Amount Per Serving
%DV
Calories
5
Total Fat
0.5 g
1%**
Cholesterol
<5mg
<2%
Vitamin A (from cod live oil and retinyl palmitate)
27 mcg RAE
3%
Vitamin D (as cholecalciferol) (from cod liver oil and cholecalciferol concentrate)
100 mcg (4,000 IU)
500%
Vitamin E (as d-alpha tocopherol)
0.67 mg
4%
Norwegian Cod Liver Oil
500 mg
†
Total Omega-3 fatty Acids☆
115 mg
†
DHA (Docosahexaenoic Acid)☆
50 mg
†
EPA (Eicosapentaenoic Acid)☆
42 mg
†
Top Medical Research Studies
9
We investigated how cod liver oil affects coronary artery disease in pigs on a high-fat diet over eight months. By comparing 7 pigs that received cod liver oil to 11 control pigs, we observed significantly less disease in the oil-fed group. Notably, lesion size and arterial narrowing were reduced, suggesting that cod liver oil may influence heart health. Both groups had high lipid levels, but the differences in atherosclerosis weren't linked to these levels. This study hints at the oil's potential to slow coronary disease progression via changes in metabolism.
Read More
7
Vitamin D's role in heart health
We examined how low levels of vitamin D (Vit D) could impact the severity of heart disease, specifically looking at myocardial ischemia. Our study involved two hundred patients who underwent myocardial perfusion imaging at Namazi Hospital in Shiraz, Iran, in 2019. We assessed both the severity of ischemia in patients and their vitamin D levels.
The results revealed a clear pattern: when vitamin D levels dropped below 10 ng/mL, patients showed a significant increase in severe myocardial ischemia. Conversely, in patients with higher levels of vitamin D, we did not find any substantial association with abnormalities in heart imaging. This indicates that maintaining adequate vitamin D levels may play a role in reducing heart disease severity.
Overall, our findings suggest that vitamin D deficiency, especially levels below 10 ng/mL, could contribute to more severe heart conditions. This could prompt health care providers to consider monitoring and addressing vitamin D levels in patients at risk for heart disease.
The results revealed a clear pattern: when vitamin D levels dropped below 10 ng/mL, patients showed a significant increase in severe myocardial ischemia. Conversely, in patients with higher levels of vitamin D, we did not find any substantial association with abnormalities in heart imaging. This indicates that maintaining adequate vitamin D levels may play a role in reducing heart disease severity.
Overall, our findings suggest that vitamin D deficiency, especially levels below 10 ng/mL, could contribute to more severe heart conditions. This could prompt health care providers to consider monitoring and addressing vitamin D levels in patients at risk for heart disease.
Read More
9
We delved into how cod liver oil (CLO) influences heart health, especially in the context of diabetes. Using a study with streptozotocin (STZ)-induced diabetic rats, we treated them with CLO and monitored various cardiovascular metrics over 12 weeks. What we found was quite telling: untreated diabetic rats faced significant increases in blood sugar and harmful lipid levels, while those receiving CLO showed improved weight gain and complete prevention of lipid problems.
Moreover, the study revealed that CLO-treated rats exhibited healthier blood vessel responses and heart function. For instance, we observed that CLO effectively corrected some vasoconstriction issues and improved heart rhythm responses that were otherwise diminished in diabetic rats. The treatment also helped preserve the structural integrity of heart tissue, which often suffers in diabetes.
Overall, this research strongly suggests that cod liver oil can be a valuable supplement for mitigating heart disease risks associated with diabetes. With its rich omega-3 fatty acids and antioxidants, CLO appears to play a protective role in maintaining cardiovascular health in diabetic settings.
Moreover, the study revealed that CLO-treated rats exhibited healthier blood vessel responses and heart function. For instance, we observed that CLO effectively corrected some vasoconstriction issues and improved heart rhythm responses that were otherwise diminished in diabetic rats. The treatment also helped preserve the structural integrity of heart tissue, which often suffers in diabetes.
Overall, this research strongly suggests that cod liver oil can be a valuable supplement for mitigating heart disease risks associated with diabetes. With its rich omega-3 fatty acids and antioxidants, CLO appears to play a protective role in maintaining cardiovascular health in diabetic settings.
Read More
Most Useful Reviews
7.5
Quick recovery
I love this vitamin D3, which is in the correct adult dose combined with Omega-3s. My family and I took it, and whenever we got sick, we recovered quickly, thanks to this supplement. I ordered this nearly a year ago and have a few pieces left. I store it in the fridge! It's a great product from a reliable company, and I recommend it wholeheartedly!
Read More
6
Bone and heart support
1 people found this helpful
Vitamin D3 is mixed with beneficial Omega-3s EPA and DHA to promote strong bones and support heart disease and immune system function.
Read More
Medical Researches
SCIENTIFIC SCORE
Possibly Effective
Based on 50 Researches
7.3
- All Researches
9
We explored the effects of docosahexaenoic acid (DHA), found in cod liver oil, on heart health after a heart attack. Using lab tests on heart cells and mouse models, we found that DHA helped protect heart cells from damage due to low oxygen levels.
Remarkably, DHA not only reduced heart damage but also improved heart function overall. It seemed to support a process called autophagy, which helps clear out damaged cells, thereby benefiting heart health after injury.
However, it's important to note that while DHA shows promising results, more research is needed to fully understand its role.
Remarkably, DHA not only reduced heart damage but also improved heart function overall. It seemed to support a process called autophagy, which helps clear out damaged cells, thereby benefiting heart health after injury.
However, it's important to note that while DHA shows promising results, more research is needed to fully understand its role.
Read More
9
We delved into how cod liver oil (CLO) influences heart health, especially in the context of diabetes. Using a study with streptozotocin (STZ)-induced diabetic rats, we treated them with CLO and monitored various cardiovascular metrics over 12 weeks. What we found was quite telling: untreated diabetic rats faced significant increases in blood sugar and harmful lipid levels, while those receiving CLO showed improved weight gain and complete prevention of lipid problems.
Moreover, the study revealed that CLO-treated rats exhibited healthier blood vessel responses and heart function. For instance, we observed that CLO effectively corrected some vasoconstriction issues and improved heart rhythm responses that were otherwise diminished in diabetic rats. The treatment also helped preserve the structural integrity of heart tissue, which often suffers in diabetes.
Overall, this research strongly suggests that cod liver oil can be a valuable supplement for mitigating heart disease risks associated with diabetes. With its rich omega-3 fatty acids and antioxidants, CLO appears to play a protective role in maintaining cardiovascular health in diabetic settings.
Moreover, the study revealed that CLO-treated rats exhibited healthier blood vessel responses and heart function. For instance, we observed that CLO effectively corrected some vasoconstriction issues and improved heart rhythm responses that were otherwise diminished in diabetic rats. The treatment also helped preserve the structural integrity of heart tissue, which often suffers in diabetes.
Overall, this research strongly suggests that cod liver oil can be a valuable supplement for mitigating heart disease risks associated with diabetes. With its rich omega-3 fatty acids and antioxidants, CLO appears to play a protective role in maintaining cardiovascular health in diabetic settings.
Read More
9
We examined the effects of cod liver oil, enriched with essential fatty acids, on heart stability after inducing myocardial infarction in rats. Over 30 days, we found that the oil significantly raised the heart's fibrillation threshold by 50% and halved the occurrence of spontaneous extrasystoles. While there were improvements in the heart's functionality during rest, overall heart pressures and contraction speeds showed no significant changes. This suggests that cod liver oil may contribute positively to heart stability, but it doesn't dramatically alter all heart functions.
Read More
9
Cod liver oil's potential heart benefits
We explored the relationship between n-3 polyunsaturated fatty acids, particularly from cod liver oil, and coronary heart disease (CHD). The research found that cod liver oil significantly reduced harmful arachidonic acid levels in heart cells, promoting a healthier balance with beneficial docosahexaenoic acid. This balance may lower risks of heart issues, including sudden cardiac death. However, while diets rich in fish oil show promise, the study does not claim that cod liver oil is a guaranteed solution to heart disease.
Read More
9
We investigated how cod liver oil affects coronary artery disease in pigs on a high-fat diet over eight months. By comparing 7 pigs that received cod liver oil to 11 control pigs, we observed significantly less disease in the oil-fed group. Notably, lesion size and arterial narrowing were reduced, suggesting that cod liver oil may influence heart health. Both groups had high lipid levels, but the differences in atherosclerosis weren't linked to these levels. This study hints at the oil's potential to slow coronary disease progression via changes in metabolism.
Read More
User Reviews
USERS' SCORE
Good
Based on 2 Reviews
8.2
- All Reviews
- Positive Reviews
- Negative Reviews
7.5
Quick recovery
I love this vitamin D3, which is in the correct adult dose combined with Omega-3s. My family and I took it, and whenever we got sick, we recovered quickly, thanks to this supplement. I ordered this nearly a year ago and have a few pieces left. I store it in the fridge! It's a great product from a reliable company, and I recommend it wholeheartedly!
Read More
6
Bone and heart support
1 people found this helpful
Vitamin D3 is mixed with beneficial Omega-3s EPA and DHA to promote strong bones and support heart disease and immune system function.
Read More
Frequently Asked Questions
No FAQs are available for this product and symptom.
References
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- Loh HH, Tay SP, Koa AJ, Yong MC, Said A, et al. Unveiling the benefits of Vitamin D3 with SGLT-2 inhibitors for hypertensive obese obstructive sleep apnea patients. J Transl Med. 2025;23:296. 10.1186/s12967-025-06312-w
- Qi H, Zhou Y, Hou HT, Wei JH, He GW, et al. Contributing role and molecular basis of Vitamin D/Vitamin D receptor deficiency in hyperhomocysteinemia-induced cardiac hypertrophy. Biochem Pharmacol. 2025;234:116812. 10.1016/j.bcp.2025.116812
- Haghighatafshar M, Shekasteband B, Firuzyar T, Etemadi Z, Farhoudi F, et al. The Impact of Vitamin D Deficiency on Coronary Artery Disease Severity Based on Myocardial Perfusion Imaging: A Cross-Sectional Study. Iran J Med Sci. 2025;50:31. 10.30476/ijms.2024.101112.3372
- Astani A, Maroofi A, Hekmatimoghaddam S, Sarebanhassanabadi M, Safari F. Sirtuin 1 mediates the pro-survival effects of vitamin D in angiotensin II-induced hypertrophy of H9c2 cardiomyoblasts. Mol Biol Rep. 2024;52:96. 10.1007/s11033-024-10168-6
- Algül E, Özbeyaz NB, Şahan HF, Aydinyilmaz F, Erdoğan A, et al. Low vitamin D levels are associated with impaired diastolic function in patients with acute coronary syndrome. Minerva Cardiol Angiol. 2025;73:57. 10.23736/S2724-5683.24.06515-3
- Sun L, Du J. Magnesium status, serum vitamin D concentration and mortality among congestive heart failure patients: a cohort study from NHANES 2007-2018. Magnes Res. 2024;37:61. 10.1684/mrh.2024.0528
- Aleksova A, Janjusevic M, Pani B, Hiche C, Chicco A, et al. The Co-Existence of Hypovitaminosis D and Diabetes Mellitus Triples the Incidence of Severe Coronary Artery Disease in Women. J Clin Med. 2024;13. 10.3390/jcm13226792
- Shi Y, Li H, Wu T, Wang Q, Zhu Q, et al. Docosahexaenoic Acid-Enhanced Autophagic Flux Improves Cardiac Dysfunction after Myocardial Infarction by Targeting the AMPK/mTOR Signaling Pathway. Oxid Med Cell Longev. 2022;2022:1509421. 10.1155/2022/1509421
- Nilsen DWT, Myhre PL, Kalstad A, Schmidt EB, Arnesen H, et al. Serum Levels of Dihomo-Gamma (γ)-Linolenic Acid (DGLA) Are Inversely Associated with Linoleic Acid and Total Death in Elderly Patients with a Recent Myocardial Infarction. Nutrients. 2021;13. 10.3390/nu13103475
- Lentjes MAH, Keogh RH, Welch AA, Mulligan AA, Luben RN, et al. Longitudinal associations between marine omega-3 supplement users and coronary heart disease in a UK population-based cohort. BMJ Open. 2017;7:e017471. 10.1136/bmjopen-2017-017471
- Ceylan-Isik A, Hünkar T, Aşan E, Kaymaz F, Ari N, et al. Cod liver oil supplementation improves cardiovascular and metabolic abnormalities in streptozotocin diabetic rats. J Pharm Pharmacol. 2007;59:1629. PubMed
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- Skúladóttir GV, Gudmundsdóttir E, Olafsdóttir E, Gudmundsson TV, Hardarson T, et al. Influence of dietary cod liver oil on fatty acid composition of plasma lipids in human male subjects after myocardial infarction. J Intern Med. 1990;228:563. PubMed
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- Simonsen T, Nordøy A. Ischaemic heart disease, serum lipids and platelets in Norwegian populations with traditionally low or high fish consumption. J Intern Med Suppl. 1989;731:83. PubMed
- Shimokawa H, Vanhoutte PM. Dietary cod-liver oil improves endothelium-dependent responses in hypercholesterolemic and atherosclerotic porcine coronary arteries. Circulation. 1988;78:1421. PubMed
- Vanhoutte PM. Platelets, endothelium and blood vessel wall. Experientia. 1988;44:105. PubMed
- Weiner BH, Ockene IS, Levine PH, Cuénoud HF, Fisher M, et al. Inhibition of atherosclerosis by cod-liver oil in a hyperlipidemic swine model. N Engl J Med. 1986;315:841. PubMed
- Hamaya R, Cook NR, Sesso HD, Buring JE, Manson JE. A Bayesian Analysis of the VITAL Trial: Effects of Omega-3 Fatty Acid Supplementation on Cardiovascular Events. Am J Clin Nutr. 2025. 10.1016/j.ajcnut.2025.02.028
- Tseng PT, Zeng BY, Hsu CW, Liang CS, Stubbs B, et al. The Optimal Dosage and Duration of ω-3 PUFA Supplementation in Heart Failure Management: Evidence from a Network Meta-Analysis. Adv Nutr. 2025;16:100366. 10.1016/j.advnut.2025.100366
- Kim JY, Kong SYJ, Jung E, Cho YS. Omega-3 Fatty Acids as Potential Predictors of Sudden Cardiac Death and Cardiovascular Mortality: A Systematic Review and Meta-Analysis. J Clin Med. 2024;14. 10.3390/jcm14010026
- O'Keefe EL, O'Keefe JH, Abuissa H, Metzinger M, Murray E, et al. Omega-3 and Risk of atrial fibrillation: Vagally-mediated double-edged sword. Prog Cardiovasc Dis. 2024. 10.1016/j.pcad.2024.11.003
- Choi GY, Calder PC. The differential effects of eicosapentaenoic acid and docosahexaenoic acid on cardiovascular risk factors: an updated systematic review of randomized controlled trials. Front Nutr. 2024;11:1423228. 10.3389/fnut.2024.1423228
- Shi F, Chowdhury R, Sofianopoulou E, Koulman A, Sun L, et al. Association of circulating fatty acids with cardiovascular disease risk: analysis of individual-level data in three large prospective cohorts and updated meta-analysis. Eur J Prev Cardiol. 2025;32:233. 10.1093/eurjpc/zwae315
- Amangurbanova M, Daher R, Asbeutah AA, Vemuri B, Mirza H, et al. Higher epicardial adipose tissue volume is associated with higher coronary fatty plaque volume and is regulated by waist circumference but not EPA+DHA supplementation. J Clin Lipidol. 2024;18:e773. 10.1016/j.jacl.2024.06.006
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- Capece U, Gugliandolo S, Morciano C, Avolio A, Splendore A, et al. Erythrocyte Membrane Fluidity and Omega-3 Fatty Acid Intake: Current Outlook and Perspectives for a Novel, Nutritionally Modifiable Cardiovascular Risk Factor. Nutrients. 2024;16. 10.3390/nu16244318
- Fukuda T, Nakajima T, Hasegawa T, Amano H, Arikawa T, et al. Relationship Between Serum ω-3 Polyunsaturated Fatty Acid Concentration and Fatty Acid Fraction of Epicardial Adipose Tissue in Patients With Cardiovascular Disease. Cureus. 2024;16:e73417. 10.7759/cureus.73417
- Li J, Nan W, Huang X, Meng H, Wang S, et al. Eicosapentaenoic acid induces macrophage Mox polarization to prevent diabetic cardiomyopathy. EMBO Rep. 2024;25:5507. 10.1038/s44319-024-00271-x
- Kumakura H, Funada R, Matsuo Y, Iwasaki T, Nakashima K, et al. Eicosapentaenoic Acid Level Predicts Long-Term Survival and Cardiovascular or Limb Event in Peripheral Arterial Disease. Ann Vasc Dis. 2024;17:135. 10.3400/avd.oa.23-00079
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Data last updated:
