Medical Nutrition Therapy 2.3 Practice Exam 2026 – Complete Test Prep

Dietary phytochemicals play a significant role in promoting health primarily due to their protective effects against chronic diseases. These naturally occurring compounds, found in various fruits, vegetables, whole grains, and legumes, exhibit a wide range of biological activities. They are known to have antioxidant properties, which help combat oxidative stress in the body, a contributing factor to the development of conditions such as heart disease, diabetes, and certain cancers.

Phytochemicals can also influence inflammation and immune function, further supporting their protective effects against chronic illnesses. Research has shown that diets rich in phytochemicals are associated with a lower risk of these diseases, highlighting their importance in health and disease prevention.

The other options do not accurately reflect the role of phytochemicals. They do not primarily contribute to weight gain, serve as a major energy source, or are limited to benefits regarding digestion. Instead, their broader health benefits are critical for overall well-being and disease management.