Alpha-linolenic acid is an essential fatty acid that must be consumed in adequate amounts to prevent deficiency. In the United States, the majority of adults meet or exceed the recommended adequate intake of alpha-linolenic acid, and deficiency is uncommon.[1][2] When deficiency does occur, it may lead to dry, scaly skin, vision problems, and neuropathy.[3][4] In rodent models of alpha-linolenic acid deficiency, impaired learning abilities have been observed, but this hasn’t been found in humans.[5]
What are the signs and symptoms of alpha-linolenic acid deficiency?
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•Last Updated: January 28, 2026