Final answer:
Alpha-linolenic acid is an essential fatty acid that cannot be synthesized by the body. It must be obtained from the diet to support normal body functions. The body can metabolize ALA to produce other important fatty acids.
Step-by-step explanation:
Alpha-linolenic acid (ALA) is an omega-3 fatty acid that cannot be synthesized by the body. It is considered an essential fatty acid, meaning it must be obtained from the diet. The body can metabolize alpha-linolenic acid to produce other long-chain unsaturated fatty acids, but the process is not very efficient, so it is still necessary to consume adequate amounts of ALA in the diet.