We need food because it provides us with energy and we need food to grow and repair injuries and for good health.
The main types of nutrients are carbonhydrates, fats, proteins, vitamins and minerals. Other things we need are water and fibre.
You can test foods for different things in them these are:
Test for starch using Iodine solution. It will turn blue/black from black/orange.
Test for glucose using Benedicts solution. Place in a warm water bath for 10 minutes. If If there is glucose in it, it will turn orangey/red.
Test for protein using biuret solution. It will turn violet if there is protein in it.
Test for fats using filter paper will turn see through if fatty.
A balanced diet is eating fats, oils, sweets, dairy, vegetables, fresh, bread and…