| And you can have some unsaturated fats like salad dressing, cooking oil, nuts, and avocado. |
| In common with all unsaturated hydrocarbons hydrogen can be added across the double bond to produce ethane. |
| Conversely, unsaturated fatty acids have one or more double bonds between carbon atoms in their chains. |
| Vegetable fats and oils with a high proportion of unsaturated fatty acids are to be preferred. |
| These unsaturated hydrocarbons are readily oxidised and polymerised, which can reduce the oil's shelf life. |
| Foods that are rich in unsaturated fats include oily fish, avocados, nuts and sunflower, rapeseed and olive oils. |
