Evidence supporting the use of: Fish (including shell)
For the body system: Specific Hormones

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Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Fish (including shellfish) is scientifically validated as supportive of the hormonal (endocrine) system, particularly due to its rich content of omega-3 fatty acids, vitamin D, selenium, and high-quality protein. Omega-3 fatty acids, abundant in fatty fish such as salmon, sardines, and mackerel, play a crucial role in modulating hormone production and function, especially sex hormones like testosterone and estrogen. Studies have demonstrated that omega-3s can help regulate menstrual cycles, reduce symptoms of polycystic ovary syndrome (PCOS), and support fertility in both men and women. Additionally, fish is a significant dietary source of vitamin D, which is essential for healthy thyroid function and overall hormonal balance. Selenium, found in shellfish (like oysters), is vital for thyroid hormone production and antioxidant defenses, protecting endocrine tissues from oxidative damage. Clinical trials and population studies support the association between regular fish consumption and improved reproductive, thyroid, and metabolic hormone profiles. However, the evidence is not uniform for all hormones or all fish types, and benefits may depend on overall dietary patterns and individual health status. Nonetheless, the current body of scientific research supports the inclusion of fish and shellfish in the diet for maintaining a healthy hormonal system.

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