营养研究可能侧重于如何制备健康食品，饮食会引起疾病或如何储存不同种类的食物。对食物如何影响人的研究对于营养学家，健康博客或私人教练都是有益的。

Courses are academic classes taught by qualified instructors that are intended to enhance participant’s knowledge of a given area or training in a particular discipline. Courses vary broadly in terms of length, size, content and duration.