In what way does L-arginine enhance the immune system?

L-arginine enhances the immune system primarily by increasing the function of immune cells. This amino acid plays a critical role in the immune response through its involvement in the synthesis of nitric oxide, which is vital for various immune functions. Nitric oxide acts as a signaling molecule that helps to regulate the activities of immune cells, including T cells and macrophages. These immune cells are essential for detecting and responding to pathogens in the body. By boosting the function of these cells, L-arginine helps to enhance overall immune system activity, improving the body's ability to fend off infections and disease.

While promoting antibody formation and managing inflammation are important aspects of immune health, the more direct influence of L-arginine is through its enhancement of immune cell activity and overall immune response. Thus, the option that highlights the increase in immune cell function directly aligns with its role in providing better immunological support.