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.

Switzerland (German: Schweiz, French: Suisse, Italian: Svizzera, Romansch: Svizra. Switzerland has some of the world renown universites like ETH in Zurich, EPFL in Lausanne, IHEID in Geneva, University of Lausanne or the University of St. Gallen. Keep in mind, it's much better to speak the local language, so if you can't speak either French, German or Italian, better go for a language course first.

A Doctorate of Philosophy, or PhD, may require eight years or more to complete, as well as a dissertation. In most fields, the possession of a PhD qualifies the holder to become a professor of a chosen subject. There are many different programs available.