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Are there bacteria in the brain or not? In My Bacteria – Weekly Update, Dr. Jiri Snaidr gets to the bottom of the possible brain microbiome. The brain is considered sterile but new studies point to bacteria and fungi in brain tissue. Are they real inhabitants or just contaminants? A controversial search for clues between neurobiology and microbiome research. For decades, the human brain has been considered one of the most sterile places in the body. But time and again, researchers report finding traces of DNA, structures, or even cultures of bacteria and fungi in brain tissue. What is behind this? In this episode, we shed light on the blood-brain barrier, the difference between infection and a possible “brain microbiome,” and explore the question of how Alzheimer's, Parkinson's, and other neurodegenerative diseases are linked to microorganisms. From spectacular studies to sobering contaminations—a scientific thriller about sterile dogmas, new hypotheses, and the question of whether our brain is really as germ-free as we believe.

They influence digestion, metabolism, and the gut microbiota, regulate hormones like GLP-1 and PYY, and reach deep into biochemical processes. This episode explores how fiber stabilizes blood sugar, lowers cholesterol, nourishes the microbiome, and where its limits lie. A journey through the physiology of the gut – from gel formation in the stomach to fermentation in the colon and the role of short-chain fatty acids. Scientifically grounded, precisely narrated, and embedded in the biology of everyday life.

Microplastics have quietly become part of our bodies, found in water, food, blood, and even the brain. But their most profound impact may lie within the gut. Tiny plastic particles interact with the intestinal microbiome, disrupting its delicate balance and triggering inflammation, oxidative stress, and immune reactions. This episode explores how microplastics alter the gut microbiota, how these changes may contribute to metabolic and neurological disorders, and what current research reveals about their hidden pathways inside the human body. It also looks at protective strategies that can help the microbiome stay resilient in an increasingly plastic world.