This course is step 9 of the comprehensive 12 Steps to Wholesome Nutrition course by Ian Craig and Rachel Jesson, based on their book Wholesome Nutrition. Each 'step' is available for purchase as an individual class, so you can pick and choose the content that is of particular interest to you.
You need to be enthusiastic about learning more about wholesome nutrition and healthy food choices for you. A little prior diet or food knowledge is useful but not essential.