Royal jelly sounds mysterious, almost mystical, to many. The background is that the information available about this valuable bee substance is primarily based on experiences and observational studies. However, the positive effects of royal jelly on our health can indeed be explained and substantiated using scientific methods. This book presents the existing studies on the health-promoting effects of royal jelly, providing a comprehensive overview of the current state of research on this fascinating bee elixir. The author also addresses the approach of nutritional epigenetics related to the phenomenon of royal jelly, which offers intriguing insights into how our diet plays a significant role in the development, or rather the non-development, of diseases. This book is an important contribution to understanding the phenomenon of royal jelly.