What is the function of antioxidants in the human body?

Antioxidants play a crucial role in protecting the body's cells from damage caused by free radicals, which are unstable molecules that can lead to oxidative stress. This oxidative stress can result in cellular damage, contributing to various diseases and aging processes. Antioxidants neutralize free radicals, preventing them from causing harm and thus maintaining the integrity of cells and tissues.

This protective mechanism is vital for overall health, as it helps to reduce inflammation and can lower the risk of chronic conditions such as heart disease, cancer, and neurodegenerative disorders. By minimizing oxidative damage, antioxidants support the body's ability to maintain homeostasis and promote longevity.

The other options relate to different physiological functions that are not directly associated with antioxidants. For instance, increasing glycogen stores, facilitating nutrient absorption, and enhancing muscle growth pertain to different biological processes and do not involve the protective effects of antioxidants against free radicals.