Evidence supporting the use of: Cod liver oil
For the body system: Skeletal System (Bones)

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Table of Contents

Synopsis

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

Cod liver oil is scientifically validated as supportive for the skeletal system, primarily due to its high content of vitamin D and vitamin A, as well as omega-3 fatty acids. Vitamin D is essential for calcium absorption in the gut, which is a critical process for bone mineralization and overall skeletal health. Numerous studies have shown that vitamin D deficiency leads to weakened bones, increasing the risk of rickets in children and osteomalacia or osteoporosis in adults. Cod liver oil was historically used as a remedy for rickets in the early 20th century, well before vitamin D was identified and added to foods, because it prevented and treated this bone disorder effectively. Modern supplementation with cod liver oil can still contribute to adequate vitamin D intake, especially in populations with limited sun exposure. Additionally, cod liver oil provides vitamin A, which is necessary for bone growth and remodeling, though excessive intake can have negative skeletal effects. The omega-3 fatty acids in cod liver oil may also contribute to reducing inflammation, which can help maintain bone health, though this effect is secondary compared to its vitamin D content. Clinical trials and population studies support the role of vitamin D (and thus, cod liver oil) in maintaining bone density and reducing fracture risk. Overall, the use of cod liver oil for skeletal support is well-founded both historically and scientifically.

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