What is an example of a long-chain omega-3 fatty acid?

Docosahexaenoic acid is indeed an example of a long-chain omega-3 fatty acid. Long-chain omega-3 fatty acids are characterized by having 20 or more carbon atoms, and they play significant roles in various bodily functions, particularly in cardiovascular health, brain development, and reducing inflammation.

Docosahexaenoic acid (DHA) consists of 22 carbon atoms and is particularly abundant in fish oils, as well as in the brain and retina, where it is vital for proper functioning and structure. It is known to contribute to the structure of cell membranes, especially in neural tissues, and has been associated with numerous health benefits, including cognitive enhancement and support for mental health.

In contrast, the other options represent different types of fatty acids. For instance, eicosapentaenoic acid (EPA), although a long-chain omega-3 as well, is not the answer being identified here. Linoleic acid is an omega-6 fatty acid and alpha-linolenic acid is a short-chain omega-3 fatty acid, both of which do not fit the requirement for long-chain omega-3 fatty acids. Thus, docosahexaenoic acid stands out as the correct representation of a long-chain omega-