Lipids Amount or type, which matters most?. Lipid Facts Solubility Food sources – Fats: animal...
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Transcript of Lipids Amount or type, which matters most?. Lipid Facts Solubility Food sources – Fats: animal...
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LipidsAmount or type, which matters most?
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Lipid Facts• Solubility• Food sources
– Fats: animal products, solid at room temp
– Oils: plant products, liquid at room temp
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Jobs in our body
• Insulate• Protect• Precursor of bile, vit D, reproductive hormones• Cell membrane component• Nervous system function
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Jobs in our body
• Insulate• Protect• Precursor of bile, vit D, reproductive hormones• Cell membrane component• Nervous system function• Our energy reserve (stored
triglycerides TG)
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Jobs in our food
• Primary type of lipid in food (TG)• Source of fat soluble vitamins (ADEK)• Source of essential fatty acids• Fat soluble toxins/chemicals : (• Concentrated calories• Tasty
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Despite Homer’s ideas, cholesterol has no flavor, taste or energy value.
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Cholesterol-good, bad or both?
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Cholesterol
Too little• Nerve function• Part of cell membrane• Limit vitamin D, bile and
reproductive hormone synthesis
Too much in wrong place• Deposits in arteries• Clogs them up• Heart attack, stroke,
ischemia…….
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Coronary Artery Disease: What is it?
• Arteries block-up over time• Trigger sets off development of
blockages• If blocked, no oxygen/nutrient to
heart • Tissue dies beyond blockage e.g.
artery feeding heart blocked heart attack
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Triggers initiate plaque build-up
• Smoking• Hypertension• Diabetes• Inflammation• High blood cholesterol (from diet or
liver)Recall: How do lipids travel in our blood?
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Lipids: From food to cell
• Digestion: complicated, slow process
• Absorbed as chylomicrons (lipoprotein= LP)
• Go to liver made into other LPs
• LPs transport most all lipid soluble substances
thru body
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Lipoprotein primer
• Made by the body; not in our food• Particles with a lipid core and a
protein coat• Chylomicron: dietary TG repackaged
in the wall of the small intestine travel to liver
• Liver repackages chylomicrons into other lipoproteins• HDL• LDL
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Lipoproteins: Role in heart health
• LDL…bad (cholesterol) stuff • HDL...good (cholesterol) for heart
health• Both are influenced by lifestyle
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Smart steps to a healthy heart
• Maintain healthy weight
• Be physically active• Manage stress• Do not smoke• Do not drink
excessively• Eat a Heart Smart
Diet
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KEYSTONE STEPS-HEART SMART DIET
Eat more colorEat less sodiumEat more fiberEat the right fats
Name foods meet all 4 requirements!
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EAT MORE COLOR: Fruit and veggies
fiber, potassium, antioxidants, reduce inflammation
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EAT LESS SODIUM
75% + from processed foods
THE PRIMARY CUPLRIT IS…
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EAT MORE FIBER particularly soluble fiber
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EAT THE RIGHT FATS
• TOTAL: ~20-35% Calories• MORE: unsaturated • LESS: saturated• AVOID: trans fats
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SOURCES OF UNSATURATED FAT
• Nuts• Plant oils• Avocado• Seeds• Fatty fish
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WHY EAT MORE UNSATURATED FAT?
• Reduces LDL (if replacing saturated fat)• Reduces inflammation• Maintains arterial elasticity• Source of essential fatty acids
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ESSENTIAL FATTY ACIDS (EFA)
• EFA’s (type of unsaturated fat)Linoleic Acid (omega-6)Alpha-Linolenic Acid or ALA
(omega-3)• Unique jobs• Energy source• Excess, stored as fat!
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EPA & DHA: The good stuff in O-3s
Oily fish (ready made EPA/DHA) tuna, salmon, herring, sardines
Vegetarian sources (ALA* EPA/DHA) flaxseed meal, soybean/tofu/walnuts/ dark leafy greens/ fortified foods
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SOURCES OF SATURATED FAT
• Animal products• Tropical oils
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EAT LESS SATURATED FATS
• Raises LDL: Clogs arteries• Produces inflammatory compounds
that promote disease• Reduces arterial elasticity• Goal <7 % of calories
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AVOID TRANS FAT
• No safe level of intake• Raises LDL• Decreases HDL• ↑ risk of heart attack, stroke and
sudden death
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The devil is in the detail. Read!
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Pair and Share1. We use cholesterol to make what life
sustaining substances?2. Describe the major components of a heart
healthy diet.3. What is our primary form of reserve body fuel?4. If we too much, or not enough cholesterol in the body, what happens?5. What are the major triggers of arterial blockage?
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Optional slides
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Heart Healthy Tips
•Eat real food; Mostly plants !!; Not too much•Eat fatty foods with caution (<30%Cal)•Replace sat/trans fat with unsaturated fat •Ditch the salt shaker and salty sauces!•Add fiber, esp soluble….from foods •Limit alcohol intake•Be physically active•Quit smoking***
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How many Calories do we store as fat????
Given: 454 g/lb AND 9 Cal/gm of fat
IF: you weigh 150 lb with 20% body fat
THEN: you have 30 lb stored body fat….or…122,580 fat Cal = 30 lb x 454 g/lb x 9 Cal/g
How many Calories do you store?
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How Much Omega-3 for heart health?
If you are healthy ~500 mg EPA and DHA/day
If high triglycerides; heart disease; rheumatoid arthritis 1-3+ gm EPA and DHA daily