In countries where people eat more pelagic fish, children are less likely to be stunted, and diets tend to include more DHA and vitamin B12.
Mechanism
Synthesis from 1 study
Eating more pelagic fish gives children the essential nutrients they need to grow tall and think clearly: DHA builds brain connections, vitamin B12 makes healthy blood, and zinc helps bones and tissues grow. When these nutrients are abundant, children are less likely to become stunted.
Most probable mechanism
When people eat more pelagic fish, their bodies get more of three key nutrients: DHA, vitamin B12, and zinc. DHA helps build and protect brain cells, vitamin B12 helps make healthy red blood cells and keeps nerves working right, and zinc helps the body grow taller by supporting bone and tissue development. Together, these nutrients prevent brain delays, anemia, and slow growth, which all lead to stunting in children.
DHA from pelagic fish is absorbed in the small intestine and incorporated into neuronal membranes, supporting synaptogenesis, myelination, and anti-inflammatory signaling in the developing brain
Vitamin B12 from pelagic fish is absorbed in the ileum and serves as a cofactor in methionine synthase and methylmalonyl-CoA mutase reactions, enabling DNA synthesis and red blood cell maturation
Zinc from pelagic fish is absorbed via ZIP4 transporters in the duodenum and acts as a cofactor for enzymes involved in protein synthesis, cell proliferation, and IGF-1 signaling
Improved DHA status enhances neurodevelopmental processes, reducing cognitive delays that can indirectly impair growth regulation
Improved vitamin B12 status prevents megaloblastic anemia and supports energy metabolism in rapidly dividing tissues, including bone marrow and intestinal epithelium
Improved zinc status enhances collagen synthesis, immune function, and insulin-like growth factor activity, directly promoting linear bone growth and reducing infection-related growth suppression
The combined effects of optimized neurodevelopment, erythropoiesis, and somatic growth reduce the prevalence of child stunting
Less supported by current evidence, but not ruled out
Pelagic fish provide heme iron, which the body absorbs more easily than iron from plants. This helps make more hemoglobin, prevents anemia, and ensures oxygen reaches growing tissues, which supports overall child growth.
Heme iron from pelagic fish is absorbed via HCP1 transporters in the duodenum with higher efficiency than non-heme iron
Absorbed iron is transported by transferrin and incorporated into hemoglobin in erythroblasts within the bone marrow
Increased hemoglobin concentration improves oxygen delivery to tissues, supporting metabolic demands of growth and reducing growth suppression from chronic hypoxia
Evidence from Studies
Supporting (1)
Community contributions welcome
Aquatic Animal Foods for Nutrition Security and Child Health
Contradicting (0)
Community contributions welcome
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