Which of the following is a characteristic of antioxidants?

Antioxidants play a crucial role in protecting cells from oxidative damage, which is caused by free radicals. Free radicals are unstable molecules that can damage cellular components, including DNA, lipids, and proteins, leading to inflammation and various diseases. Antioxidants neutralize these free radicals, helping to maintain cellular health and integrity.

This protective function is particularly important in various physiological processes, including those involved in exercise and recovery, as oxidative stress can result from intense physical activity. Understanding the role of antioxidants in cellular protection underlines the importance of including them in the diet through various food sources, which may include fruits, vegetables, nuts, and whole grains.

The other options do not accurately reflect the characteristics or roles of antioxidants. For instance, while fruits are a rich source of antioxidants, they are not exclusive to them; many other food categories also provide these beneficial compounds. Furthermore, antioxidants are not directly involved in muscle building or providing energy; rather, those processes rely on proteins, carbohydrates, and fats.