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Fats and Oils (lipids)

Fats and Oils (lipids). Sources of fats and oils in our diets . What are lipids. They are esters of fatty acids and glycerol. Three fatty acids are combined to one glycerol to make what is known as a triglyceride. . Glycerol is a triol (an alcohol made with three hydroxyl groups

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Fats and Oils (lipids)

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  1. Fats and Oils (lipids)

  2. Sources of fats and oils in our diets

  3. What are lipids • They are esters of fatty acids and glycerol. Three fatty acids are combined to one glycerol to make what is known as a triglyceride. Glycerol is a triol (an alcohol made with three hydroxyl groups Fatty acids are long chain carboxylic acids

  4. Digestion

  5. Some chemistry of common fatty acids What patterns do you observe?

  6. Saturated and unsaturated fatty acids What is the difference?

  7. Write their condensed structural formulae

  8. Dietary advice

  9. Dietary advice Which would you expect to be the most/least healthy fats here?

  10. Omega 3 and omega 6 acids • These are considered healthy • Low risk of disease of circulatory system • Unsaturated fats • Common in oily fish • Omega 6 1st double bond links carbon 6 – 7 • Omega 3 1st double bond links carbon 3 – 4

  11. Health benefits of omega 3 fatty acids

  12. Cis and trans • These relate to the unsaturated bonds in fatty acids What is the difference?

  13. Cis and trans fats

  14. Why are cis better for you.

  15. In view of this, why do we hydrogenate unsaturated fats

  16. Hydrogenation continued

  17. Creating Trans fats

  18. Saponification

  19. Plenary questions

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