Minerals are needed but in very small amounts, two important minerals are iron for making red blood cells and calcium for strong bones and teeth
Vitamins are needed for the body but again in very small amounts. Two important minerals are vitamin C for repair of skin and D for taking up calcium
Fibre is used to keep the large intestine working well.
Water is to prevent dehydration
Fibre is important because it prevents constipation and keeps everything moving in the gut. Fibre mainly consists of cellulose which is found in a plant cell (it forms the cell wall in plants) It cannot be digested by the body and adds bulk to the food, this helps it push along through the intestines.
Some people take vitamin and mineral supplements (tablets) instead of the real thing. In some case they take too many which leads to side affects.
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