1 / 23

Lipids

Lipids. Lipids. Fats!. Fats. Bad reputation but still important! Supplies energy Transports fat-soluble nutrients Insulate and protect organs Promotes healthy skin and hair Adds structure to cell membranes Add flavor and texture to food. Types of lipids. Triglycerides Phospholipids

jhollinger
Télécharger la présentation

Lipids

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lipids

  2. Lipids • Fats!

  3. Fats • Bad reputation but still important! • Supplies energy • Transports fat-soluble nutrients • Insulate and protect organs • Promotes healthy skin and hair • Adds structure to cell membranes • Add flavor and texture to food

  4. Types of lipids • Triglycerides • Phospholipids • Sterols

  5. Triglycerides • Three classifications: • Saturated • Monounsaturated • Polyunsaturated

  6. Saturated fats • Mostly animal fats • Butter, lard • Source: http://www.pbs.org/saf/1104/images04/teachsatfat.jpg

  7. Saturated Fats • Solid at room temperature • Raise cholesterol levels • Increase risk of heart disease • Mostly animal fats • Meats, poultry, whole milk dairy products • Some oils • Coconut oil, palm oil, palm kernel oil

  8. Unsaturated fats • Monounsaturated • Source: http://www.veggs.com.au/pic/fat2.gif

  9. Monounsaturated fats • Liquid at room temperature • No effect on cholesterol • Does not raise or lower • Found in oils • Olive oil, peanut oil, sesame seed oil, canola oil • Avocados • Notice anything about these products?

  10. Polyunsaturated fats • Source: http://www.veggs.com.au/pic/fat3.gif

  11. Polyunsaturated fats • Heart healthy • May reduce risk of heart disease • Lowers LDL cholesterol • Found in: • Corn oils, cotton seed oil, safflower oil, sunflower oil, soybean oil and fish • What do you notice about this list? • Also liquid at room temperature

  12. Trans Fats • Source: http://www.hidden-diabetes-cures.com/images/cis-trans-fatty-acids.gif

  13. Cisvs Trans • Cis are more naturally occuring • Trans – • Hydrogenation process • Adds hydrogen • Straightens cis structure • Raises LDL and lowers HDL • Increases risk of heart disease • 1996- All labeling must now list trans fat • To ban or not to ban?

  14. Phospholipids • Found in much smaller amounts than triglycerides • Function: • Emulsifiers • Add structure to cell membranes • Aid in transport

  15. Sterols • Can you name a sterol? • Source: http://www.raw-milk-facts.com/images/Cholesterol2.gif

  16. Sterols • Why are they necessary? • Function: • Cell structure – especially brain and nerves • Aids in hormones • Helps to synthesize vitamin D

  17. Food & Cholesterol • Only animal products have cholesterol • Egg yolks are very high in cholesterol • Your liver makes enough cholesterol

  18. Cholesterol • Total blood cholesterol • HDL vs LDL • “Lousy” • “Helpful” • Recommended to have total cholesterol under 200 mg/dL • Ideal: HDL greater than 40; LDL lower than 100

  19. http://www.mayoclinic.com/images/image_popup/ww5r236.jpg

  20. Lipid digestion • Source: http://www.annecollins.com/images/digestion.jpg

  21. Recommended fat amounts • More important to focus on overall eating patterns • 20-35% of calories; approximately 65 grams • How many calories does fat have per gram? • 9 kcal/gram • It is easy to eat too much fat!!

  22. Fat • Considered calorie dense • Fat & Food • Visible fats • Butter, cream cheese, sour cream, mayonnaise, cooking oils • Invisible fats • Whole milk dairy products, high-fat meats, cakes, cookes, nuts, candy bars, chocolate, pizza, etc, etc, etc • What are some ways to reduce fat in your diet?

  23. Going fat-free • Is it possible to not get enough fat? • YES! • Cool temperatures become intolerable • Girls/women stop menstruating and may become infertile • Children stop growing • Skin deteriorates

More Related