AAFCS Nutrition and Wellness Certification Practice Test

Antioxidants play a crucial role in nutrition primarily by protecting cells from oxidative damage caused by free radicals. Free radicals are unstable molecules that can result from various processes, including metabolism and exposure to environmental factors such as pollution and UV radiation. These molecules can lead to cellular damage, which is linked to various health issues, including chronic diseases and aging.

Antioxidants neutralize free radicals by donating electrons, thus stabilizing them and preventing the cascade of damage to cellular components like DNA, proteins, and lipids. This protective effect contributes significantly to overall health, potentially lowering the risk of diseases such as cancer, cardiovascular diseases, and neurodegenerative disorders. By incorporating sources rich in antioxidants—such as fruits, vegetables, nuts, and whole grains—individuals can enhance their metabolic health and support their body's defense mechanisms.

The other options highlight different aspects of nutrition, but they do not encompass the primary function of antioxidants. Energy provision, absorption of vitamins and minerals, and protein sources are related to different nutrients and do not directly pertain to the protective role of antioxidants in combating oxidative stress and enhancing cellular health.