Lipids are non-polar molecules and are therefore not soluble in water Functions of Lipids are: Cell Structure phospholipids and cholesterol make-up each cell's plasma membrane Long-Term Energy Storage triglycerides are stored in adipose or "fat" tissue Hormonal Regulation steroid hormones regulate reproduction Organ Protection fats surround organs and offer protection from wear and tear Insulation fats fill the outer layers of the body to insulate us from cold temperatures

1. Triglycerides

2. Phospholipids

3. Sterols

Fig. 5-4, p. 144 SaturatedMonounsaturatedPolyunsaturated Point of unsaturation Points of unsaturation

p. 144 Saturated Fats

Fig. 5-11, p. 154 Saturated Fats

Lipoproteins

Fig. 5-9a, p. 151 Protein Cholesterol Phospholipid Triglyceride Higher densityLower density LDL (more lipid, less protein) HDL (Less lipid, more protein) Percent

Atherosclerotic Plaques

Solid Fats and Added Sugars Limit intakes of food and beverages with solid fats and added sugars

You Can Control Your Saturated Fat!

Fig. 5-5, p. 145

p. 174

Essential Fatty Acids

Omega-3 Fatty Acids

Table 5-5, p. 157

Oils Select the recommended amounts of oils from among these sources

Milk, Yogurt, and Cheese Make fat-free or low-fat choices

Candies 1% Breakfast cereals 1% Salad dressings 3% Household shortening 4% Potato chips, corn chips, popcorn 5% Fried potatoes c 8% Milk and other dairy products; meat b 21% Margarine d 17% Commercial cakes, cookies crackers, doughnuts, pies, bread, other bakery items 40% Sources of Trans Fats: