Is the microbiota diet effective or not?

Tell me what your microbiota is like and I’ll tell you who you are. Indeed, what to eat. The The Wall Street Journal speaks of personalized diets based on the population of bacteria that live in our intestine as the latest trend in nutrition. It happens in the United States and the United Kingdom, where companies like Viome and Zoe, the so-called “precision nutrition” start-ups, sell home test kits to analyze the user-patient microbiota (this is a stool test) , to then provide personalized nutritional advice, including the use of supplements.