Natural and artificial substances

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•Food contains natural and artificial substances.

•A natural substances a chemical that exists in nature.

•eg. sodium chloride(salt), water, glucose and cellulose

•An artificial substances is a chemical made by humans.

•eg tartrazine (yallow colouring) or octylethanote (orange flavour)

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•Water is a natural substance but is is possible to make water chemically by reacting hydrogen and oxygen.

•The chemically made water is completely identically to natural water.

•It is actually immpossible to tell the difference from the natural water and the chemical reacted water.

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•Some substances taste/smell the same but they are chemically different sometimes they have totally different ingredients to the natural substances.

Not all natural or artificial substances are not good for you though.

Natural substances such as sugar can cause tooth decay. Research also shows that sugar is biggest cause of obesity

High levels of Salt causes high blood pressure and increases the risk of heart attack.