Antioxidants are essential molecules that respond to oxidative damage caused by free radicals, which arise from metabolic processes and external factors such as pollution, radiation, and unhealthy diets. Oxidative stress, resulting from an imbalance between free radical production and antioxidant defense, is linked to chronic diseases, including cancer, cardiovascular disorders, neurodegenerative conditions, and premature aging. While the human body possesses enzymatic antioxidants such as superoxide dismutase (SOD), catalase, and glutathione peroxidase, dietary antioxidants like polyphenols, flavonoids, carotenoids, and vitamins C and E play a crucial role in reinforcing these defenses. A diet rich in antioxidant-containing foods, such as fruits, vegetables, nuts, and whole grains, is vital for preventing oxidative damage and supporting immune and metabolic functions. Antioxidants are classified into natural and synthetic types. Natural antioxidants, present in plant-based meals and extracts, help to reduce oxidative stress and improve cellular health. Synthetic antioxidants, such as butylated hydroxytoluene (BHT) and butylated hydroxyanisole (BHA), are commonly used in food preservation to prevent spoilage and lipid oxidation, although concerns exist regarding their long-term safety. The modern lifestyle, characterized by high consumption of processed foods, environmental pollutants, and chronic stress, exacerbates oxidative stress, increasing the risk of metabolic and inflammatory diseases. Consequently, promoting antioxidant-rich diets, reducing dependency on synthetic additives, and incorporating lifestyle modifications such as regular exercise and stress management are essential strategies for mitigating oxidative stress-related diseases. Advances in nutraceuticals, functional foods, and personalized nutrition are increasing antioxidant absorption and efficacy. Future research should focus on improving the stability and bioavailability of natural antioxidants while developing safer synthetic replacements. Raising public awareness and integrating evidence-based dietary recommendations will be crucial in leveraging antioxidants for disease prevention and overall health maintenance.