ISSA Nutritionist Practice Exam

Which of the following is a non-essential fatty acid?

1. Omega-3

2. Omega-6

3. Omega-9

4. Omega-12

The correct answer is: Omega-9

Omega-9 is classified as a non-essential fatty acid because the body is capable of synthesizing it from other dietary components. Non-essential fatty acids are those that the body can produce internally, which means they do not need to be consumed directly through the diet. Omega-9 fatty acids, such as oleic acid, are commonly found in various foods, including olive oil, avocados, and nuts, but their presence in the diet is not critical for maintaining health, as the body can create them from the essential fatty acids. In contrast, omega-3 and omega-6 fatty acids are considered essential because the human body cannot produce them; they must be obtained through dietary sources. These essential fatty acids play vital roles in various physiological processes, including inflammation regulation and cellular function. Omega-12, while not a standard term in fatty acid classification, does not hold the same relevance in nutrition as omega-3 and omega-6. Therefore, recognizing the distinction between essential and non-essential fatty acids is crucial in understanding dietary needs and the role of fats in health.