Supplement Facts
Serving Size: 1 Softgel
Amount Per Serving
%DV
Calories
5
Total Fat
0.5 g
< 1%**
Vitamin A (from Retinyl Palmitate and Cod Liver Oil)
750 mcg
83%
Vitamin D3 (from Cholecalciferol and Cod Liver Oil)
6.75 mcg (270 IU)
34%
Cod Liver Oil
650 mg
†
The product is found useful for the following medical conditions
Autoimmune Disorder details
SCIENTIFIC SCORE
Possibly Effective
Based on 42 Researches
7.6
USERS' SCORE
Good
Based on 2 Reviews
8.4
9
Cod liver oil aids rheumatoid arthritis
In a recent study involving 43 patients suffering from rheumatoid arthritis, we explored the impact of taking 1 gram of cod liver oil daily for three months. The results were striking. We observed notable reductions in morning stiffness by an impressive 52.4%, alongside decreases in both painful and swollen joints, each showing a 40% improvement. Pain intensity also saw a significant drop of 67.5%.
Additionally, the feedback from the patients was overwhelmingly positive. Approximately 68% reported that the treatment was effective, while a remarkable 95% praised its tolerability. However, it’s worth noting that 11 patients did experience some nonsevere adverse effects, but only three of those were possibly related to the cod liver oil itself.
Overall, it seems that cod liver oil can indeed offer relief for those grappling with rheumatoid arthritis, making it a treatment worth considering for improving symptoms of this autoimmune disorder.
Additionally, the feedback from the patients was overwhelmingly positive. Approximately 68% reported that the treatment was effective, while a remarkable 95% praised its tolerability. However, it’s worth noting that 11 patients did experience some nonsevere adverse effects, but only three of those were possibly related to the cod liver oil itself.
Overall, it seems that cod liver oil can indeed offer relief for those grappling with rheumatoid arthritis, making it a treatment worth considering for improving symptoms of this autoimmune disorder.
9
Supports thyroid health
Most Useful Review
3 people found this helpful
Vitamin A in the form of retinol palmitate is ideal for absorbing beta-carotene, along with vitamins D and E. Its role in thyroid health is critical, as deficiency is linked to autoimmune disorder (AIT). Vitamin A can lower TSH levels and protect the thyroid, even with iodine deficiency. In hypothyroidism, it's important to replenish vitamin A as it is hard to obtain from plant sources. I take one capsule daily; it has been helpful for my health.
Updated: Apr 2025
Blurred Vision details
SCIENTIFIC SCORE
Moderately Effective
Based on 6 Researches
8.5
USERS' SCORE
Good
Based on 5 Reviews
8.4
9
We investigated a case of persistent blurred vision following cataract surgery, leading to the discovery of vitamin A deficiency in a 74-year-old man. Using advanced tests like full-field electroretinograms and optical coherence tomography, we noted significant retinal changes and low vitamin A levels.
After administering vitamin A supplements for three months, we saw remarkable improvement in his vision and retinal health. This highlights the importance of diagnosing vitamin A deficiency, especially in patients showing persistent vision problems post-surgery.
After administering vitamin A supplements for three months, we saw remarkable improvement in his vision and retinal health. This highlights the importance of diagnosing vitamin A deficiency, especially in patients showing persistent vision problems post-surgery.
9
Rich in vitamins
Most Useful Review
Prominent Fish liver oil is a dietary supplement sourced from the liver of certain fish, especially cod. It is rich in vitamins A and D, along with omega-3 fatty acids. Some benefits include: **Heart Health**: Omega-3 fatty acids reduce inflammation and lower blood pressure. **Bone health**: Vitamin D enhances calcium absorption, aiding bone health. **Vision improvement**: Vitamin A is vital for eye health. **Immune enhancement**: Vitamins A and D bolster the immune system. It’s essential to follow your doctor’s guidance for usage and be aware of potential interactions with medications. Choose a quality fish liver oil free from contaminants for safety.
Updated: Apr 2025
Bone Pain details
SCIENTIFIC SCORE
Moderately Effective
Based on 2 Researches
8.3
USERS' SCORE
Good
Based on 9 Reviews
8.4
9.5
We examined a case of a 4-year-old boy who experienced severe bone pain and related symptoms after taking high doses of vitamin A for three months. Despite typical liver-related complications usually associated with vitamin A toxicity, he presented with significant musculoskeletal issues and skin changes. Following the discontinuation of vitamin A, the boy showed a remarkable recovery within two months. This case highlights that excessive vitamin A intake can lead to serious bone pain and other health problems, though he did not develop liver disease as expected.
9
Pain and inflammation relief
Most Useful Review
7 people found this helpful
This product is fantastic! It's affordable and treats many issues, including SAD, depression, aches, and displaced spinal discs. It relieved my bone pain, helped me heal an injured ligament, and improved my energy levels while ensuring I don't suffer from winter blahs.
Updated: Apr 2025
Cold details
SCIENTIFIC SCORE
Moderately Effective
Based on 4 Researches
8.3
USERS' SCORE
Good
Based on 8 Reviews
8.4
9
We explored how vitamin A affects our body’s response to cold, specifically looking at its role in transforming white fat into brown fat, a process known as browning. This transformation is significant, as it can help reduce obesity and improve metabolic health.
In our investigation, we conducted cold exposure studies involving both mice and humans. We observed that exposure to cold led to an increase in circulating vitamin A, also known as retinol, and its transporter protein, Rbp. However, in mice lacking this protein, we found that their ability to adapt to the cold and promote thermogenesis—essentially, generating heat through fat—was severely compromised.
Interestingly, we also noted that stimulating human fat cells with retinol heightened the expression of genes associated with thermogenesis and boosted mitochondrial activity, which is vital for burning fat. In humans, the rise in vitamin A during cold exposure hinted at improved fat utilization.
Overall, our findings revealed that not only are vitamin A levels responsive to cold, but effective transportation of this vitamin is crucial for cold-induced fat browning and the body's ability to generate heat.
In our investigation, we conducted cold exposure studies involving both mice and humans. We observed that exposure to cold led to an increase in circulating vitamin A, also known as retinol, and its transporter protein, Rbp. However, in mice lacking this protein, we found that their ability to adapt to the cold and promote thermogenesis—essentially, generating heat through fat—was severely compromised.
Interestingly, we also noted that stimulating human fat cells with retinol heightened the expression of genes associated with thermogenesis and boosted mitochondrial activity, which is vital for burning fat. In humans, the rise in vitamin A during cold exposure hinted at improved fat utilization.
Overall, our findings revealed that not only are vitamin A levels responsive to cold, but effective transportation of this vitamin is crucial for cold-induced fat browning and the body's ability to generate heat.
8
No illnesses
Most Useful Review
3 people found this helpful
After three months of taking this, I've noticed several positive effects: my skin appears healthier, hair is shinier, nails are strong, and most importantly, I have not been ill at all during the cold season. The effects require some time, but I’m delighted with the improvements.
Updated: Mar 2026
Arthritis details
SCIENTIFIC SCORE
Possibly Effective
Based on 25 Researches
7.8
USERS' SCORE
Good
Based on 4 Reviews
8.3
9
Cod liver oil reduces arthritis symptoms
In a recent study, we examined the effectiveness of cod liver oil in alleviating symptoms of rheumatoid arthritis. Forty-three participants took 1 gram of cod liver oil daily for three months. The results were promising.
We observed significant reductions in morning stiffness, with an impressive 52.4% improvement. Additionally, patients reported a 42.7% decrease in painful joints and a 40% reduction in swollen joints. Pain intensity also saw a notable decline of 67.5%.
When asked about their experience, 68% of patients rated the treatment as "good" or "very good" in terms of effectiveness, and an impressive 95% found it tolerable. While some patients reported nonsevere side effects, three of those reactions might have been linked to the cod liver oil.
Overall, we find that cod liver oil could be a beneficial addition to treatment options for those suffering from rheumatoid arthritis.
We observed significant reductions in morning stiffness, with an impressive 52.4% improvement. Additionally, patients reported a 42.7% decrease in painful joints and a 40% reduction in swollen joints. Pain intensity also saw a notable decline of 67.5%.
When asked about their experience, 68% of patients rated the treatment as "good" or "very good" in terms of effectiveness, and an impressive 95% found it tolerable. While some patients reported nonsevere side effects, three of those reactions might have been linked to the cod liver oil.
Overall, we find that cod liver oil could be a beneficial addition to treatment options for those suffering from rheumatoid arthritis.
9
Effective arthritis remedy
Most Useful Review
I experience no aftertaste and have found it very effective for my arthritis in my hands, which I have dealt with since my teenage years.
Updated: Mar 2026
Attention Deficit Hyperactivity Disorder details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 2 Reviews
8.3
7.5
Enhances concentration
Most Useful Review
1 people found this helpful
My children, aged 12 and 16, take it almost daily. It really improves their focus and concentration. I take two myself, and we even give it to our dogs by mixing it into their food once a day, alongside ground alfalfa tablets. Regular dog food isn't sufficient, even when we choose a low salt variety. Two of our dogs are over 15 now, and we will continue to order this.
Updated: Mar 2026
Cardiovascular Disease details
SCIENTIFIC SCORE
Questionable
Based on 25 Researches
6.8
USERS' SCORE
Good
Based on 4 Reviews
8.3
9
Cod liver oil shows potential benefits
We explored the impact of cod liver oil on cardiovascular health, particularly its influence on heart disease processes. While marine fish consumption offers some benefits, high doses of fish oil can raise certain cholesterol levels and potentially increase risks.
In our study, we observed that when swine were given an atherogenic diet along with cod liver oil, important reductions in harmful monocyte adhesions and platelet clumping occurred. This suggests that fish oil may help improve blood flow and could be less risky than previously thought.
However, while promising, these effects from cod liver oil need more investigation to clarify their relevance in humans.
In our study, we observed that when swine were given an atherogenic diet along with cod liver oil, important reductions in harmful monocyte adhesions and platelet clumping occurred. This suggests that fish oil may help improve blood flow and could be less risky than previously thought.
However, while promising, these effects from cod liver oil need more investigation to clarify their relevance in humans.
9
Non-GMO source
Most Useful Review
NOW Cod Liver Oil is rich in Omega-3 fatty acids and serves as an excellent source of Vitamins A and D3. With strict quality control, it effectively aids overall health and supports cardiovascular disease prevention.
Updated: Mar 2026
High Cholesterol details
SCIENTIFIC SCORE
Questionable
Based on 32 Researches
6.8
USERS' SCORE
Good
Based on 5 Reviews
8.3
9
We explored the effects of all-trans retinoic acid (atRA) on atherosclerosis in rabbits fed a high-fat diet. In an experiment where rabbits were divided into groups, some received atRA while others received atorvastatin or both.
We found that atRA effectively reduced plaque size, comparable to atorvastatin, and their combination was even more effective. Additionally, atRA improved the serum lipid profile, suggesting it could be a valuable tool in managing cholesterol levels.
We found that atRA effectively reduced plaque size, comparable to atorvastatin, and their combination was even more effective. Additionally, atRA improved the serum lipid profile, suggesting it could be a valuable tool in managing cholesterol levels.
10
Healthy skin
Most Useful Review
2 people found this helpful
This product is excellent and has greatly benefited me. My skin, hair, and nails are healthier, and my good cholesterol has increased. The quantity is large, meaning it lasts a long time, and the price is very affordable. I highly recommend it.
Updated: Mar 2026
Heart Attack details
SCIENTIFIC SCORE
Possibly Effective
Based on 21 Researches
7.1
USERS' SCORE
Good
Based on 14 Reviews
8.2
9
We investigated the effects of cod liver oil, rich in omega-3 fatty acids, on heart health following a heart attack in rats. After a feeding period, we discovered that cod liver oil significantly boosted the heart's ability to withstand fibrillation and reduced abnormal heart rhythms.
It improved heart functioning during rest, but we found no significant impact on heart pressure or contraction speed. While there are some promising signs, the overall influence of cod liver oil on heart attack recovery remains limited.
It improved heart functioning during rest, but we found no significant impact on heart pressure or contraction speed. While there are some promising signs, the overall influence of cod liver oil on heart attack recovery remains limited.
9
Good for the heart
Most Useful Review
3 people found this helpful
Great Cod Liver Oil 650mg is an excellent dose. It’s very good for heart health and overall well-being.
Updated: Apr 2025
Liver Disease details
SCIENTIFIC SCORE
Moderately Effective
Based on 18 Researches
8.1
USERS' SCORE
Moderately Good
Based on 4 Reviews
7.8
We aimed to explore how vitamin D3 supplementation affects liver disease, specifically in patients with cirrhosis. In a thorough double-blind, randomized controlled trial involving 60 participants, we offered patients either a weekly dose of 50,000 IU of vitamin D or a placebo for 12 weeks. Our goal was to assess various health indicators, including serum vitamin D levels, blood glucose measures, and liver function tests.
After the 12-week period, we observed significant changes among those taking vitamin D. The serum levels of 25-hydroxy-vitamin-D3 increased substantially, alongside notable improvements in fasting blood glucose and insulin resistance, measured by HOMA-IR. These results suggest that vitamin D3 could play a beneficial role in managing certain metabolic aspects of liver disease in cirrhosis patients.
Overall, our study highlights the potential of vitamin D3 supplementation as a simple yet effective strategy to improve specific health parameters in people living with cirrhosis, paving the way for further exploration in this important area of research.
After the 12-week period, we observed significant changes among those taking vitamin D. The serum levels of 25-hydroxy-vitamin-D3 increased substantially, alongside notable improvements in fasting blood glucose and insulin resistance, measured by HOMA-IR. These results suggest that vitamin D3 could play a beneficial role in managing certain metabolic aspects of liver disease in cirrhosis patients.
Overall, our study highlights the potential of vitamin D3 supplementation as a simple yet effective strategy to improve specific health parameters in people living with cirrhosis, paving the way for further exploration in this important area of research.
7.5
Cholesterol improvement
Most Useful Review
3 people found this helpful
Cholesterol was raised. With my doctor’s guidance, we enhanced my nutrition, aerobic exercise, and dietary supplements. I took unrefined vegetable oils, lecithin, omega-3, sorbents, probiotics, antioxidants, and cod liver oil, prescribed as iHerb Now Foods Cod Liver Oil (650 mg). I consumed 2 capsules twice daily. The capsules are large, reasonably priced, and I liked the product. Cholesterol began to decline after a month.
Updated: Mar 2026
Blood Clot details
SCIENTIFIC SCORE
Possibly Effective
Based on 20 Researches
7.1
USERS' SCORE
Moderately Good
Based on 3 Reviews
7.7
9.5
In a fascinating experiment involving young pigs, we observed how cod liver oil can prevent blood clotting in biodegradable vascular prostheses. The study included a total of 25 pigs, with 15 of them fed cod liver oil alongside their regular diets. They were compared against 10 control pigs that weren’t given any additional fatty acids.
Over the course of several months, we performed imaging tests and found that all the control implants were completely thrombosed by day 30. In stark contrast, the pigs who received the cod liver oil showed 100% patency—or openness—of their grafts even at later stages of the study.
Upon retrieval, 7 out of 9 grafts in the cod liver oil group remained patent, indicating that the fish oil's rich content of n-3 polyunsaturated fatty acids could significantly modify lipid metabolism. This modification appears to prevent the clumping of platelets, which is a crucial factor in blood clot formation.
Tissue analysis revealed that the patent grafts were well-integrated with tissue resembling natural blood vessel lining, complete with muscle cells that indicate healthy growth. This study clearly shows that a diet enriched with essential fatty acids can play a substantial role in preventing thrombosis in biodegradable vascular prostheses. The combination of our innovative materials and dietary strategies could pave the way for better heart surgery outcomes in the future.
Over the course of several months, we performed imaging tests and found that all the control implants were completely thrombosed by day 30. In stark contrast, the pigs who received the cod liver oil showed 100% patency—or openness—of their grafts even at later stages of the study.
Upon retrieval, 7 out of 9 grafts in the cod liver oil group remained patent, indicating that the fish oil's rich content of n-3 polyunsaturated fatty acids could significantly modify lipid metabolism. This modification appears to prevent the clumping of platelets, which is a crucial factor in blood clot formation.
Tissue analysis revealed that the patent grafts were well-integrated with tissue resembling natural blood vessel lining, complete with muscle cells that indicate healthy growth. This study clearly shows that a diet enriched with essential fatty acids can play a substantial role in preventing thrombosis in biodegradable vascular prostheses. The combination of our innovative materials and dietary strategies could pave the way for better heart surgery outcomes in the future.
7.5
Improved heart health
Most Useful Review
This omega improves blood vessel and heart health, effectively lowering cholesterol levels. The ingredients and quality are excellent.
Updated: Apr 2025
Heart Disease details
SCIENTIFIC SCORE
Questionable
Based on 35 Researches
6.9
USERS' SCORE
Moderately Good
Based on 24 Reviews
7
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.
9
Benefits heart and brain
Most Useful Review
A wonderful dietary supplement with great ingredients. Pure fish oil is beneficial for heart disease and brain health. I recommend it.
Updated: Mar 2026
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