Do Lack of Sleep and Ultra-Processed Foods Threaten Testosterone and Male Fertility?
The modern lifestyle, characterized by shortened nights and a diet rich in ultra-processed products, may well be undermining men’s hormonal health. Testosterone, a key hormone for reproduction, muscle mass, and energy, is seeing its levels decline due to the combined effect of these two factors. Recent research reveals that lack of sleep and excessive consumption of ultra-processed foods act on common biological mechanisms, thereby disrupting testosterone production and sperm quality.
Sleep plays a central role in hormone regulation. In men, testosterone levels follow a circadian rhythm, peaking in the morning. A night that is too short or of poor quality disrupts this cycle. Studies show that total sleep deprivation significantly reduces testosterone in healthy men. Over the long term, insufficient sleep also promotes inflammation, insulin resistance, and oxidative stress—all processes that impair the function of Leydig cells in the testes, which are responsible for testosterone production. Men who sleep less than six hours per night often exhibit symptoms related to testosterone deficiency, such as decreased libido, fatigue, or weight gain.
At the same time, ultra-processed foods, which are ubiquitous in industrial diets, contain additives and compounds that can disrupt hormonal balance. These products, often high in sugars, saturated fats, and chemicals such as bisphenol A or phthalates, are associated with lower testosterone concentrations and impaired sperm quality. The mechanisms involved include chronic inflammation, disruption of the gut microbiome, and increased cellular stress. One study observed that men who consumed the most ultra-processed foods had reduced sperm concentration and motility.
The interaction between sleep and diet worsens these effects. Lack of sleep increases the appetite for calorie-dense, nutrient-poor foods, creating a vicious cycle. Conversely, an unbalanced diet can degrade sleep quality, amplifying metabolic and hormonal disorders. Researchers emphasize that these two often underestimated factors may partly explain the increase in male fertility disorders observed in recent decades.
The solutions lie in adopting healthier lifestyle habits. Restorative sleep and a balanced diet rich in fresh, unprocessed foods—such as the Mediterranean diet—could help restore optimal testosterone levels and preserve reproductive function. These simple measures could also reduce the risk of metabolic diseases and improve overall well-being. The stakes are high, as these hormonal disruptions affect not only fertility but also men’s long-term overall health.
Bibliographie
Source de l’étude
DOI : https://doi.org/10.1007/s11154-026-10030-z
Titre : The 24/7 lifestyle and male hormonal health: how sleep deprivation and ultra-processed foods impact testosterone and reproduction
Revue : Reviews in Endocrine and Metabolic Disorders
Éditeur : Springer Science and Business Media LLC
Auteurs : Bianca Camilo Schimenes; Tathiana A. Alvarenga; Mariana Toricelli; Mariana Moyses-Oliveira; Matheus Brandão Vasco; Sergio Tufik; Monica Levy Andersen