Thats up to you! You can continue for as many days as you like or choose to implement some of what you have learnt along the way a few days a week. There is no pressure here. The challenge has been designed to be a fun way of including and introducing new ways of eating more plants. Hopefully this book will make that happen! My biggest advice would be to make sure that you eat enough. This is not a diet book. Have fun in the process and best of luck! I’ll be rooting for you and supporting you along the way.