Cholesterol Chemistry

Is Cholesterol Bad for our Health? Why do we need Cholesterol?

© Simon Davies

A chemical description of an infamous but important chemical which is ever-present in dietary advice.

There are two main types of Lipids. The first type is triglyceride fats and oils. These are dealt with in another article. The second type is cholesterol. Of all dietary issues, our cholesterol level is probably top of the list for many people. But, what is cholesterol and why is it so bad for us?

Structure

Cholesterol is a molecule made up of three parts. First there is a hydroxyl group. This group is soluble in water. Next there is a steroid ring section. Finally there is a hydrocarbon chain. This is hydrophobic (it does not dissolve in water). It does, however, dissolve in fatty and oily substances.

Necessary in the Body

The human body needs cholesterol. Animal bodies also need cholesterol. Both human and animal bodies produce cholesterol in order to make steroid hormones like testosterone and oestrogen. These hormones are based on the steroid ring section and the hydroxyl group in cholesterol. Hormones play and important role in the biochemistry of the body.

Other Uses

Other ways that the body uses cholesterol include: