What is the primary function of antioxidants in animal physiology?

The primary function of antioxidants in animal physiology is to protect against free radical damage. Free radicals are unstable molecules that can cause oxidative stress by damaging cells, proteins, and DNA. Antioxidants neutralize these free radicals, thereby preventing potential harm and maintaining cellular integrity. This protective function is crucial for overall health, as excessive oxidative stress has been linked to various diseases, including cancer, cardiovascular diseases, and neurodegenerative disorders. By mitigating damage caused by free radicals, antioxidants play an essential role in promoting cellular health and longevity.

The other options, while important in their own right, do not directly relate to the primary role of antioxidants. For example, antioxidants do not primarily function to enhance nutrient absorption or stimulate hormone production, nor are they directly involved in supporting muscle contraction. Instead, their main role is rooted in their ability to combat oxidative stress and maintain physiological balance.