Western Dietary Pattern Reduced Male Fertility: A Systematic review and Meta-analysis of Observational Studies

Abstract

Background: Previous studies have investigated the associations between dietary patterns and male infertility, but found contradictory results. So, this meta-analysis was conducted to examine the association between dietary patterns and male infertility. Methods: An electronic search was conducted to identify the studies over association between dietary patterns and male infertility. The western and healthy dietary patterns were selected in this regard. The random-effect model was used to compute the summary risk estimates. Results: We found eight articles, of which five (n = 7679 participants) were included in our meta-analysis. This meta-analysis determined that the western dietary patterns containing high levels of processed, meat, high-fat dairy, and low levels of vegetables, fruit, and whole grains could significantly reduce the sperm concentration (MD = -0.07, P = 0.01). However, no significant relationship was observed between this dietary pattern and the sperm motility and morphology (MD = 0.01, P = 0.71, MD = 0.2, P = 0.39, respectively). Moreover, regarding the healthy dietary pattern, which contains high level of fruit, vegetables, whole grain, low-fat dairy, as well as low level of red meat and processed food, no significant relationship was observed (sperm concentration: MD = 0.11, P = 0.11, morphology: MD = -0.02, P = 0.42 and motility: MD = 0.35, P = 0.09). Conclusions: Findings of our meta-analysis suggested that the western dietary patterns could decrease the sperm concentration and reduce male fertility. Further prospective studies are required to confirm this result.

Effects of calcium carbide ripened banana on organ weight, histological architecture and semen profile on male albino Wistar rats

“…Fruits are a crucial food item in human diets, rich in nutrients and known for defending against diseases (1), and consumption of fruits positively impacts on testicular functions. Mediterranean diets which are high in fruits, vegetables, fish, and whole grains, are associated with higher semen quality [2]. However, inconsistent results on dietary fiber intake and hormone levels affect male reproductive system and may be attributed to pesticide residues, heavy metals, artificial ripening agents, and nitrate.…”