The study of nutrition may focus on how to prepare healthy foods, which diets can cause diseases or how to store different kinds of foods. The study of how foods affect people can be beneficial for nutritionists, health bloggers or personal trainers.

A diploma is a document granted by any number of institutions, from colleges to technical schools. The intention of a diploma is to show that the holder has successfully completed coursework and has specific knowledge in the relevant subject. Diplomas are often offered and can be completed online.