No, it's not required - but RECOMMENDED to complete various specialisations if you want to set yourself apart! You can study one, two or ALL level 5 and 6 specialisations. You're not required to study all 13 certifications. The Nutrition Business Explorer Program is all about YOU choosing your own path, to set yourself apart from others. This is entirely up to you, and it depends on how much time you have and which topics are of most interest to you!