Lipids

Hydrophobic (nonpolar, uncharged)

use for energy (9kcal/g) or Structure

cell membranes and adipose

3 TYPES :

Triglycerides- glycerol + 3 fatty acids, dietary, adipose, transported by chylomicrons (lipoproteins)

Phospholipids- P+2 fatty acids + glycerol, amphipathic: hydrophilic and hydrophobic, cell membranes, lecithin

Sterols- 4 ring structure, steroids, Vitamin D, sex hormones, cortisol, Cholesterol, liver, endo, exo,

(cortisol) VLDL LDL

functional sterols- added Omega 3

FATTY ACIDS

CH3-(CH)n-COOH

Short, medium, longchain

saturated, unsaturated

single double

OMEGA 3,6,9

Hydrogenation: unsaturated —-} saturated

Trans fats increase the risk of Cardio Vascular Disease

in baked goods, and fried foods

FOODS

AMDR 20-35%

Less then 10% sat fats

maximize unsaturated (olive oil, etc.)

Need omega 3 ( flax, fish oils)= linolenic (Essential)

Good sources:

-nuts and seeds lipids + Proteins

-vegetables + vegetable oil

-fish (8oz a week) salmon, tuna, shrimp (avoid tilefish, shark)

-Mediterranean diet More vegetables, grains, olive oil less meats and sweets