Technological food has led to the fact that modern man is simply chronically ill. He has allergies, heart, depression, chronic fatigue, apathy, incessant intoxication, he balances on the verge of moving to diabetes and oncology and eventually moves there. And once, a long time ago, the average life expectancy was called the century in Russia. That is, to live at least a hundred years - it was normal, in the order of things. What is the secret here? The kitchen of our ancestors was based on one simple component - rye sourdough. It cooked not only bread, but also many other dishes. Why rye sourdough? Because it has a special power. The power of unknown origin, since not explored, is forgotten. But you can feel it if you try the recipes in this book.