Our skin is the largest organ of the body and serves as a complex ecosystem that protects us from environmental stressors while interacting with our immune system. Just like the gut, our skin is colonized by trillions of microorganisms — bacteria, fungi, viruses and even microscopic mites — collectively known as the skin microbiome . These microbes are not just passive passengers; they are active members of our skin’s defence and regulatory systems. What Is the Skin Microbiom