A crash course in alkenes and alkynes, their structures, and how to remember which is which. [9:36]

Metabolism is a complex process that has a lot more going on than personal trainers and commercials might have you believe. Today we are exploring some of its key parts, including vital nutrients -- such as water, vitamins, minerals,...

National Public Radio talks with Dr. Walter Willett, Harvard MD and nutritionist, about changes that need to be made in the 1992 US Food Guide Pyramid. Interesting as an introduction to this topic, with links to related stories.

Introduction to lipids like fats and phospholipids. [5:43]

A video reviewing over the macromolecules known as lipids. Learn that the types of lipids including fats, waxes, steroids and phospholipids. [11:31]