ACE Health Coach Certification Practice Test

Which of the following is an example of an incomplete protein?

1. Poultry

2. Egg

3. Soy

4. Nuts

The correct answer is: Nuts

Incomplete proteins are those that do not contain all nine essential amino acids in sufficient amounts required by the body. Among the options provided, nuts are classified as incomplete proteins because they lack certain essential amino acids, making them insufficient to meet the body's complete protein needs when consumed alone. While poultry, eggs, and soy are considered complete proteins as they provide all nine essential amino acids, nuts may need to be combined with other protein sources, such as grains or legumes, to provide a full profile of essential amino acids. This distinction highlights the importance of dietary variety, especially for those following a vegetarian or plant-based diet, to ensure they are receiving adequate protein nutrition.