Science & Technology / Natural Science Disciplines / Biology & Life Sciences

You're 90% Bacteria: Why Killing Germs Is Making You Sick

Good Germs, Bad Germs: Health and Survival in a Bacterial World

Jessica Snyder Sachs

Jessica Snyder Sachs, in her book *Good Germs, Bad Germs: Health and Survival in a Bacterial World*, reveals a shocking truth: the human body is not a single organism but a superorganism, with bacterial cells outnumbering human cells 10 to 1. For decades, we've waged war on bacteria with antibiotics and extreme cleanliness, but this war mindset has backfired. Antibiotics are creating superbugs like MRSA, while our obsession with hygiene is fueling epidemics of allergies, asthma, and autoimmune diseases. Sachs explains the 'old friends' theory—how our immune systems evolved to need exposure to harmless microbes to stay balanced. Without them, our immune systems become hair-triggered, attacking ourselves. The solution isn't more killing; it's restoring balance: using narrow-spectrum antibiotics, probiotics, and even embracing dirt. This video breaks down the science of the microbiome, the dangers of agricultural antibiotic overuse, and how we can survive and thrive in a bacterial world by shifting from war to coexistence.