Tests reveal that insect repellents decrease sperm count and eliminate beneficial gut bacteria

Research from two independent scientific groups indicates that widespread industrial chemicals and pesticides may harm bacteria essential for human health and potentially endanger male reproductive function.

Many substances designed to target specific organisms, such as insects or fungi, also impact gut microbiota, explains Indra Roux from the University of Cambridge. Her team analyzed over 1,000 chemical compounds and identified 168 with a probable risk to the human microbiome.

A significant number of these chemicals had never before been recognized for antibacterial effects, the researchers report in Nature Microbiology. Fungicides and industrial compounds had the most pronounced effects, with approximately 30% showing activity against gut bacteria.

The team emphasizes that disrupting the microbiome can lead to a range of health issues, including digestive disorders, obesity, immune system dysfunction, and mental health challenges.

These findings align with earlier warnings from George Mason University researchers, published in November, regarding the effects of insecticides, especially neonicotinoids, on sperm production. Sumaiya Safia Irfan, a member of that study, states, Exposure to these chemicals may reduce sperm quality, interfere with hormonal balance, and damage testicular tissue.

Although the evidence primarily comes from animal studies, the researchers note that the reproductive processes of mammals support the applicability of these results to humans.

Author: Sophia Brooks