For many years, we underestimated the role of microorganisms living in our bodies, but advanced science is completely changing the way we look at them. Microbes control our health - today this is a proven fact. Collen's book is a fascinating story about the latest advances in microbiology. The state of a person’s microflora determines his weight, the uninterrupted functioning of the immune system, mental health and even... the choice of a life partner. The cause of many of the ailments of modern man - obesity, autism, mental illness, eating disorders, allergies, autoimmune disorders and cancer - should be sought in the inability to take care of our most devoted and reliable helpers - our “native” microbes. The science of microbes opens up new horizons for modern medicine. Among other things, he claims - and this is good news - that we are able to influence the state of microorganisms in the direction we need.