How are carbohydrates, lipids, and proteins important to the well being of the individual?

Question

How are carbohydrates, lipids, and proteins important to the well being of the individual?

Answer 1

carbohydrates=energy. lipids=protection and temperature regulation. proteins=build and repair cells.  

Answer 2

These are three of the four main macromolecules in an individual.  The missing one is nucleic acids.

Carbs =  Provide energy and sometimes structure (i.e. cellulose), also important in cell self recognition (cell membrane glycoproteins).

Lipids = Storage of energy, but also cushioning and insulation.  Also includes some hormones such as steroids (testosterone and estrogen).

Proteins = Main structural component, but most importantly enzymes which control the chemical reactions of the body

And, even though you didn't ask...

Nucleic acids = DNA and RNA for heredity and control of cell processes including the direct production of the protein and indirectly (by way of enzymatic reaction) for everything else.