Grains have been a staple food for humans since ancient times. Recently, there has been a growing interest in a wholesome grain-based diet. Udo Renzenbrink not only provides practical guidance on regular diets or special diets, along with recipes for dishes sorted by the days of the week, but also answers questions about the nature of different grain types and their effects on humans. In this context, the spiritual scientific research findings of Rudolf Steiner are used as a foundation for a deeper understanding of nature and humanity.