Dictionary of Human Evolution and Biology

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Arachidonic Acid

One of the long-chain polyunsaturated essential fatty acids required for growth of the liver, adrenal glands, and brain structures; sources are predominantly in the marine food chain. Researchers have suggested that arachidonic acid and docosahexanoic acid were substances critical for increased encephalization in hominid lineages. Aka omega-6 fatty acid.

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From "Dictionary of Nursing and Individual Health Care"