Remember, these are foods, not medicine so there really is no set dosage!
The way these recipes are designed is to incorporate ingredients shown to have specific detoxifying benefits (in research and ancient medicine). By choosing more of these foods and less unhealthy foods, you should begin to feel better pretty soon.
The timing varies for each individual depending on what else you are eating in your diet, other lifestyle habits (think sleep, smoking, drinking, exercise, etc.), and how long you may have been eating the not-so-good stuff. Remember to get in a variety of ingredients to reap the benefits for overall health and detoxification and that eating healthy is a lifestyle change - not something you do and then stop once you start seeing results.
Some people report side effects that include headaches, fatigue, and a number of other issues that usually go away after the body has fully detoxed. Please talk to your doctor if you start to feel any strange side effects or before any drastic dietary changes.