A.
The human body is a complex machine, which needs fuel to operate, and the fuel we give it comes directly from the things we eat and drink. The foods we eat contain nutrients that are absorbed into our bloodstream basically through digestion and are involved in all body processes.
The six important nutrients are carbohydrates, proteins, lipids (fats), water, vitamins and minerals. These individual nutrients differ in form and function, and in the amount needed by the body, but they are all vital for energy, organ function, cell growth, combating infection, repairing tissue, digestion of food, weight management and general wellbeing. They allow us to sustain life by providing us with the basic materials our bodies need to carry on their daily functions.
We are all biologically different, and although everyone is unique we all need the six main nutrients because they are the basic building blocks of a good diet. By choosing the healthiest forms of each and eating them in the proper balance at the right time, we can help towards our body being as healthy as possible, and functioning at its optimal level for many years.