Oxidative Stress, Antioxidants, Gut Microbiota and Male Fertility.

Abstract

It is imperative to comprehend the multifactorial causes of male infertility and to identify effective treatment methods, to enhance male reproductive health, and to develop more personalised and effective therapeutic interventions. This review discusses the multifactorial aspects contributing to male infertility, focusing on oxidative stress (OS), sperm quality, gut microbiota, and the potential role of adaptogens. A comprehensive literature search was conducted across several major databases, including the Cochrane Library, Medline, Embase, SciSearch, PubMed, Web of Science, Scopus, and Google Scholar. The findings from the studies included in the databases highlight the significant role of oxidative stress in male infertility, with reactive oxygen species (ROS) contributing to sperm DNA fragmentation and impairment of spermatogenesis. The review further elucidates the influence of both endogenous and exogenous sources of ROS, including lifestyle factors and environmental exposures, on male reproductive health. Emerging research also highlights the involvement of key molecular pathways, such as Nrf2, AMPK/PGC-1α, and NF-κB, in regulating OS within the male reproductive system. Additionally, the review outlines the relationship between endothelial dysfunction, cardiovascular health, and male infertility, identifying OS as a common underlying factor. In addition to the OS, the gut microbiota has been identified as a pivotal factor in male fertility, influencing inflammation and hormonal regulation. This review underscores the potential merits of a synergistic strategy that integrates dietary interventions, antioxidants, gut microbiota modulation, and adaptogens to enhance fertility outcomes. Adaptogens, recognised for their capacity to assist the body in coping with stress and re-establishing equilibrium, may confer protective effects against OS and improve reproductive health. The review under discussion emphasises the importance of a holistic approach to male infertility, integrating molecular, clinical, and lifestyle factors to optimise reproductive health.