Cod health benefits

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Cardiovascular Health Benefits of Cod

Cod consumption has been shown to support cardiovascular health in several ways. Eating baked cod fillet can lower serum cholesterol and increase beneficial long-chain omega-3 polyunsaturated fatty acids (n-3 PUFAs) in the blood and tissues, which are linked to a reduced risk of heart disease . Cod liver oil, rich in omega-3 fatty acids, also helps reduce total cholesterol and LDL cholesterol levels, especially when combined with cholesterol-lowering medication . Additionally, cod protein powder can lower fasting serum nonesterified fatty acids and improve lipid metabolism in healthy adults . These effects suggest that cod and its derivatives may help manage cholesterol and support heart health Vikøren2018Vildmyren2019Fatima2021.

Cod and Weight Loss

Research indicates that cod consumption can aid in weight loss, particularly in overweight and obese individuals. In a controlled study, people who ate cod five times a week lost 1.7 kg more weight over eight weeks compared to those who did not eat seafood, showing a clear dose-response relationship between cod intake and weight loss . This suggests that including cod in a calorie-restricted diet can enhance weight loss efforts .

Cod Protein and Glucose Regulation

Cod protein may improve insulin sensitivity and help regulate blood sugar. In insulin-resistant individuals, a diet rich in cod protein improved insulin sensitivity compared to diets with other animal proteins, which could help prevent type 2 diabetes . In animal studies, even a low intake of cod protein improved lipid metabolism and reduced post-meal blood sugar levels . Supplementation with cod residual protein also reduced early markers of impaired glucose metabolism in healthy adults, indicating potential benefits for blood sugar control .

Bone Health and Cod-Derived Peptides

Calcium-binding peptides from cod bone can enhance calcium absorption and improve bone health. In animal studies, these peptides increased calcium bioavailability, improved bone structure, and reduced markers of bone turnover, helping to prevent osteoporosis . This suggests that cod byproducts may be valuable for supporting bone health, especially in populations at risk for osteoporosis .

Nutritional and Lifestyle Factors

Cod and cod liver oil are popular dietary supplements, especially in regions with high fish consumption. Cod liver oil is a source of vitamins A and D, and its use is associated with healthier lifestyle choices, such as higher physical activity and greater intake of fruits and vegetables . However, vitamin D intake from cod liver oil may not always match individual needs, so monitoring vitamin D status is important .

Conclusion

Cod and its derivatives offer a range of health benefits, including improved cardiovascular health, support for weight loss, better glucose regulation, and enhanced bone health. These effects are linked to cod’s unique nutritional profile, including its protein content, omega-3 fatty acids, and bioactive peptides. Including cod in the diet, whether as fillet, protein powder, or cod liver oil, can be a valuable part of a healthy lifestyle.

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Most relevant research papers on this topic

Intake of Baked Cod Fillet Resulted in Lower Serum Cholesterol and Higher Long Chain n-3 PUFA Concentrations in Serum and Tissues in Hypercholesterolemic Obese Zucker fa/fa Rats

Lean fish consumption, such as baked cod fillet, may benefit cardiovascular health by reducing serum cholesterol and increasing n-3 PUFA levels in obese Zucker fa/fa rats.

Very Rigorous Journal

2018·

12citations

·Linn A Vikøren et al.

Nutrients·

DOI

Consumption of cod and weight loss in young overweight and obese adults on an energy reduced diet for 8-weeks.

Cod consumption, at 150 g 5 times a week, leads to 1.7 kg greater weight loss in young overweight or obese adults on an 8-week energy restriction diet compared to a isocaloric diet without seafood.

RCT

2009·

42citations

·A. Ramel et al.

Nutrition, metabolism, and cardiovascular diseases : NMCD·

DOI

Cod protein powder lowered serum nonesterified fatty acids and increased total bile acid concentrations in healthy, lean, physically active adults: a randomized double-blind study

Daily supplementation with 8.1 g cod residual protein powder for 8 weeks significantly improves lipid metabolism in healthy, lean, physically active adults.

RCTRigorous Journal

2019·

5citations

·I. Vildmyren et al.

Food & Nutrition Research·

DOI

Role of Cod Liver Oil in Reducing Elevated Lipid Parameters

Cod liver oil in addition to rosuvastatin effectively reduces cholesterol levels more effectively than rosuvastatin alone.

RCTLarge Human TrialRigorous Journal

2021·

7citations

·Faryal Fatima et al.

Cureus·

DOI

Dietary Cod Protein Improves Insulin Sensitivity in Insulin-Resistant Men and Women

Dietary cod protein improves insulin sensitivity in insulin-resistant individuals, potentially contributing to prevention of type 2 diabetes by reducing metabolic complications related to insulin resistance.

Very Rigorous JournalHighly Cited

2007·

170citations

·V. Ouellet et al.

Diabetes Care·

DOI

Effect of Cod Residual Protein Supplementation on Markers of Glucose Regulation in Lean Adults: A Randomized Double-Blind Study

Cod residual protein supplementation may reduce early markers of impaired glucose metabolism in lean adults, with trimethylamine N-oxide as an appropriate biomarker.

RCTVery Rigorous Journal

2020·

5citations

·I. Vildmyren et al.

Nutrients·

DOI

A low dietary intake of cod protein is sufficient to increase growth, improve serum and tissue fatty acid compositions, and lower serum postprandial glucose and fasting non-esterified fatty acid concentrations in obese Zucker fa/fa rats

A low intake of cod protein (25%) effectively improves lipid metabolism and postprandial glucose regulation in obese Zucker fa/fa rats without affecting adiposity and muscle mass.

Non-RCTAnimal StudyRigorous Journal

2015·

30citations

·Aslaug Drotningsvik et al.

European Journal of Nutrition·

DOI

Functional Calcium Binding Peptides from Pacific Cod (Gadus macrocephalus) Bone: Calcium Bioavailability Enhancing Activity and Anti-Osteoporosis Effects in the Ovariectomy-Induced Osteoporosis Rat Model

Pacific cod bone-derived calcium binding peptides (CBP-Ca) improve calcium bioavailability, reduce bone turnover rate, and potentially treat osteoporosis.

Non-RCTAnimal StudyVery Rigorous Journal

2018·

59citations

·Kai Zhang et al.

Nutrients·

DOI

Modern science, moral mothers, and mythical nature: a multimodal analysis of cod liver oil marketing in Sweden, 1920–1930

Cod liver oil marketing in Sweden (1920-1930) aimed at mothers, balancing scientific rationality, scientific motherhood, and nature to convince them that cod liver oil was necessary for their children's health.

2022·

20citations

·L. O’Hagan et al.

Food and Foodways·

DOI

Predictors for cod-liver oil supplement use — the Norwegian Women and Cancer Study

Cod-liver oil supplement use is associated with higher education, physical activity, and BMI in the normal range, as well as increased consumption of fruits, vegetables, and vitamin D.

Observational StudyHighly Cited

2003·

83citations

·M. Brustad et al.

European Journal of Clinical Nutrition·

DOI

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