Omega-3 DHA in human brain evolution

What is it about?

Omega-3 DHA is the major polyunsaturated fatty acid in the brain and retina for most of life. Modern studies indicate that a nutritional source of DHA is required in the diet, despite the well established fact that human metabolism can biosynthesize DHA from the plant source precursor alpha-linolenic acid. DHA is found in animal and marine foods and is rare or absent from terrestrial plants. The question arises, did humans evolve a requirement, or conditional requirement, for DHA? The light of modern medical studies suggest the answer is yes, while considering alternatives.

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Why is it important?

Human dietary requirements on traditional diets inform dietary needs that must be supplied in the industrialized food supply. They are also important for defining the range of foods required for optimal health in resource limited populations