Because your body doesn't use any of those items, only their components (to either build its own version of the three OR for energy).
You need Carbohydrates, Proteins, Fats (Yes, Fats) Vitamins, Mineral Salts, and Fibre.
You need proteins, fats, carbohydrates, minerals, vitamins, fibers and water in your diet. You have to take care of proteins. Carbohydrates fallow you in vegetarian diet. For the vitamins and minerals, you have to take fruits and vegetables. Fats make the food palatable. Fats give you lot of calories.
All food contains complex substances such as carbohydrates, proteins and fats. The body cannot utilise these substances in their complex form. The food consumed is broken down into simpler substances by a procedss called digestion. The digested food can be easily absorbed by the body.
You need proteins, fats, carbohydrates, vitamins and minerals. Without balanced diet you may get many diseases.
Carbohydrates, fats, and proteins are the primary substances that provide energy for the body. Carbohydrates are the body's preferred source of energy, fats are stored for long-term energy reserves, and proteins can be broken down into amino acids that can be used for energy in times of need.
Proteins contain Amino Acids, which builds new bodily tissues and repairs any tissues that need repairing. Fats and carbohydrates do not build or repair tissues because they do not contain amino acids.
living things require proteins, carbohydrates, fats, minerals, vitaminc, calcium, etc.
Because a steak does your body no good directly. However by breaking down (digesting) the food to the basic components like amino acids, then your body absorbs the essential nutrients and leaves the rest in the digestive tract.
Your body doesn't necessarily need carbohydrates, as long as it can get its energy from proteins and fats. But consuming carbohydrates are the fastest way to give your body the energy it need to carry out its daily functions.
When it comes to carbohydrates or fats producing more ATP, fats tend to produce more ATP per gram. Fats contain about 33 percent more ATP than carbs.
to suck
They are a sours of energy