Next-Generation Dietary Antioxidants in Women’s Reproductive Health: Mechanisms, Reproductive Outcomes, and Therapeutic Potential

Oxidative stress has emerged as a key factor regulating female fertility, reproductive aging, and the development of various gynecologic and pregnancy-associated diseases. While physiological concentrations of reactive oxygen species play a fundamental role in many aspects of normal reproduction such as folliculogenesis, oocyte maturation, implantation, and placental development, abnormal or chronic oxidative stress impairs redox homeostasis and promotes mitochondrial dysfunction, inflammation, DNA damage, and cellular senescence. Recent research interest has shifted toward next-generation dietary antioxidants, including bioactive polyphenols, carotenoids, micronutrients, and nutraceutical combinations with improved bioavailability and molecular targets. These compounds go beyond classical free-radical scavenging activity and modulate a network of redox-sensitive signaling pathways involved in autophagy, apoptosis, endocrine regulation, and immunological balance. In this review, we integrate current mechanistic advances into a cohesive framework that illustrates the regulation of key cellular processes affecting female reproductive physiology by next-generation dietary antioxidants. We also critically evaluate experimental, translational, and clinical data supporting their role in promoting reproductive outcomes, including oocyte quality, ovarian reserve, pregnancy success, and mitigation of age-related reproductive decline. We highlight their potential in the therapeutic intervention of oxidative stress-related conditions such as infertility, polycystic ovary syndrome, endometriosis, early ovarian insufficiency, and menopause-associated disorders. Finally, we discuss the current challenges associated with dosage optimization, bioavailability, long-term safety, and interindividual variability. We conclude by highlighting next-generation dietary antioxidants as a promising, widely available, and non-invasive approach to improve women's reproductive health and promote fertility throughout their lifespan.