In countries where people eat more seafood and other aquatic animals, dietary records show higher intake of DHA, choline, and vitamin B12, suggesting these foods are important sources of these...
Mechanism
Synthesis from 1 study
Eating more fish and seafood gives people more of the essential nutrients their bodies need—like DHA for the brain, choline for nerve signals, and vitamin B12 for blood cells—because these nutrients come already in forms the body can use right away. Plants don’t provide these nutrients in the same...
Most probable mechanism
When people eat more fish and seafood, their bodies absorb more of three key nutrients—DHA, choline, and vitamin B12—because these nutrients are naturally packed in forms that the body can easily use. DHA gets built into brain cells, choline helps make brain chemicals and cell membranes, and vitamin B12 helps make red blood cells and keeps nerves working. These nutrients don’t come as easily from plants, so eating aquatic foods is a direct way to get them in sufficient amounts.
Docosahexaenoic acid (DHA) from aquatic animal source foods is absorbed in the small intestine and incorporated into neuronal and retinal cell membranes.
Choline from aquatic animal source foods is absorbed in the small intestine and used to synthesize phosphatidylcholine for cell membranes and acetylcholine for neurotransmission.
Vitamin B12 from aquatic animal source foods binds to intrinsic factor in the stomach and is absorbed in the ileum, where it serves as a cofactor for methionine synthase and methylmalonyl-CoA mutase, enabling DNA synthesis and red blood cell maturation.
Heme iron from mollusks and crustaceans is absorbed via heme carrier protein 1 in the duodenum with higher efficiency than non-heme iron from plant sources.
Zinc from aquatic animal source foods is absorbed in the duodenum and jejunum via ZIP4 transporters and supports enzyme function in growth, immune response, and protein synthesis.
The combined presence of DHA, choline, vitamin B12, heme iron, and zinc in aquatic animal source foods ensures high bioavailability, overcoming limitations of plant-based diets that lack these nutrients in usable forms.
Evidence from Studies
Supporting (1)
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Aquatic Animal Foods for Nutrition Security and Child Health
Contradicting (0)
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Gold Standard Evidence Needed
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