This free online Human Nutrition course will give you an Introduction to Macronutrients. Our bodies require us to consume macronutrients on a daily basis to maintain important bodily functions such as growth and energy production. With this course, you will take an in-depth look at the three key energy-yielding macronutrients - carbohydrates, proteins, and lipids - and gain a solid understanding of their role in the maintenance of good health.