HHS-OASH-2026-0397-0486 https://www.regulations.gov/comment/HHS-OASH-2026-0397-0486 The ability of electromagnetic frequencies (RF) to positively or negatively affect the human microbiome has been proven with very concrete scientific data ( https://www.nature.com/articles/s41579-025-01227-1?utm_source=twitter&utm_medium=social&utm_campaign=nrmicro ). Our studies have also shown that probiotic bifidobacteria in the human gut respond positively to this frequency (https://arxiv.org/abs/2603.07762). Furthermore, it is now known that environmental factors such as RF and wireless technology, in conjunction with microplastic exposure, increase the severity of gut dysbiosis (https://www.nature.com/articles/s41598-024-53842-2 ). Therefore, the relationships between the gut microbiota, RF, and microplastics must be clearly elucidated. ​​​​​​​ HUSEYİN SANCAR BOZKURT MD,AGAF ​​​​​​​ sancarb79@gmail.com ​​​​​​​ Pendik Bölge International Hospital ​​​​​​​ Istanbul/Türkiye