Water Soluble Vitamins David L. Gee, PhD FCSN 443 - Nutrition 2 Central Washington University.
Nutrition and Disease Prevention Dr. David L. Gee FCSN 245 Basic Nutrition.
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Transcript of Nutrition and Disease Prevention Dr. David L. Gee FCSN 245 Basic Nutrition.
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Nutrition and Disease Prevention
Dr. David L. Gee
FCSN 245 Basic Nutrition
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Leading Causes of Death
#1 - Heart Disease 280 deaths/100,000/yr
#2 - Cancers 210 deaths/100,000/yr
#3 - Strokes 60 deaths/100,000/yr
#8 - Diabetes 20 deaths/100,000/yr
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Incidence of early heart disease (under age 65)
Males: 300/100,000 fatal MI 80/1,000 MI
Female: 125/100,000 fatal MI 45/1,000 MI
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History of a Heart Attackearly stages
Fatty StreaksFactors that contribute to fatty streak
formation hypertension cigarette smoke inflammation other causes?
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Low-grade Systemic Inflammation in Overweight Children
Pediatrics, Jan. 2001 cross-sectional epidemiological study 3,561 children, 8-16 yrs old C-reactive protein (a marker of
inflammation) linked with development of heart disease in overweight adults
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C-reactive Protein in Overweight Children
Other factors (smoking by parents, inactivity) have also been Associated with increased CRP in children.
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History of a Heart AttackProgression of the disease
Atherosclerosis “Hardening of the arteries”
Accumulation of lipids (LDL-C) by macrophages forming foam cells
Growth of fibrous cells on inner wall of coronary arteries
Calcification of endothelium of coronary arteries Results in coronary arteries that are narrowed and
stiff causing reduced blood flow.
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CHOLESTEROL BUILDSToo much fat in the blood can build up as plaque within heart vessel
walls. Its presence triggers the inflammation alarm, attracting immune cells such as monocytes, which seek out and attach to the plaque.
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INFLAMMATION SETS INThe monocytes mature into macrophages, which begin engulfing the
fatty plaque. The immune activity alerts the liver to produce CRP, which floods in to attack the growing plaque.
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A HEART ATTACK OCCURSAs immune cells pile onto the plaque, it becomes increasingly
unstable and eventually ruptures. Debris from the lesion can cause a blood clot or trigger a heart attack.
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History of a Heart AttackEnd stage of the disease
AnginaMyocardial Infarction
Thrombosis: growth of stationary clot
Embolism: sudden closure by loose clot
IschemiaLocal deficiency of blood supply
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History of a Heart Attack
Warning signs Angina & shortness of breath Often no warning!
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Treatment of late-stage CHDSecondary Prevention of CHD
Testing Stress test Angiogram
Angioplasty Balloon angioplasty stents
Coronary Bypass Surgery Grafting of healthy veins around diseased coronary
arteries
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Primary Prevention of CHD
Know your risk factorsMake dietary changesStart/continue exerciseStop smokingStress reductionUse medication if necessary
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CHD Risk Factors( * modifiable)
High LDL-cholesterol * Low HDL-cholesterol * High blood pressure * Family history of early CHD Current cigarette smoking * Diabetes * (Obesity *)
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Risk Factors for CHD
High Total Blood Cholesterol >200 mg/dl: borderline high risk >240 mg/dl: high risk
High LDL-C >130 mg/dl: borderline high >160 mg/dl: high risk
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© 2002 Wadsworth Publishing / Thomson Learning™
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Lowering your LDL-C
Decrease dietary saturated fat < 10% calories (dietary guidelines) < 7% calories (AHA diet)
Decrease dietary cholesterol < 300 mg/day (dietary guidelines) < 200 mg/day (AHA diet)
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Lowering your LDL-C
Replacing dietary SFA with MUFA Canola oil, olive oil
Increase dietary fiber (soluble) Whole grains, oats, fruits, vegetables
Pectins (fruits)Beta-glucans (oatmeal)
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Lowering your LDL-C
Decrease dietary Trans-FADecrease dietary Trans-FA Reduce consumption of foods containing
hydrogenated fats
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Lowering your LDL-C Medications
Plant stanols/sterolsBenecol, Take Control Inhibits absorption of dietary cholesterol
“Statin” drugs Zocor, Lipitor Inhibits cholesterol synthesis in liver
Bile acid binding resins Questran Prevents reabsorption of bile acids and forces liver to make more from
cholesterol
Niacin (pharmacological doses) Prevents synthesis of VLDL and LDL
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Risk Factors for CHD
Low HDL-C< 40mg/dl : high risk> 65mg/dl : protective
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Increasing your HDL-C
ExerciseAlcohol (chronic low dosages)
1-2 servings/d males1 serving/d females
Acute high dosages can cause dyslipidemia
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Risk Factors for CHD
HypertensionDiabetes
lose weight if overweight (type 2) control blood sugar
Cigarette smoking quit/don’t start
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When you stop smoking, your body begins a series of changes that continue for years:
Source: Centers for Disease Control and Prevention 20 minutes after quitting
Your heart rate drops. 12 hours after quitting
The carbon monoxide level in your blood drops to normal. 2 weeks to 3 months after quitting
Your heart attack risk begins to drop. Your lung function begins to improve.
1 to 9 months after quitting Your coughing and shortness of breath decrease.
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When you stop smoking, your body begins a series of changes that continue for years:
Source: Centers for Disease Control and Prevention
1 year after quitting Your added risk of heart disease is half that of a smoker's.
5 years after quitting Your stroke risk is reduced to that of a non-smoker's five to 15 years
after quitting. 10 years after quitting
Your lung cancer death rate is about half that of a smoker's. Your risk of cancers of the mouth, throat, esophagus, bladder, kidney and pancreas decreases.
15 years after quitting Your risk of heart disease is back to that of a non-smoker's.
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Non-modifiable Risk FactorsAge
males over 45 female post-menopause
Family History premature CHD
males under 55females under 65
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Risk Reduction
0
20
40
60
80
100
smoke, hiBP, hiTC
hiBP, hiTC
hiTC
none
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Is heart disease reversible?
Dean Ornish: Reversing Heart Disease Very low fat (<10% of Calories)
Minimal saturated fatSemi-vegetarian, whole grains
Exercise & Stress Reduction Randomized Controlled Trials
Angiograms show regression of lesions
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Copyright restrictions may apply.
Nissen, S. E. et al. JAMA 2006;0:295.13.jpc60002-10.
Example of Regression of Atherosclerosis in a Patient in the Trial
Regression with 2 year use of high dosage of cholesterol-lowering medication
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May is American Stroke Month, but strokes happen year-round. Each year 700,000 people have a new or recurrent stroke. On average every three minutes someone dies of a stroke. There are currently 4.8 million stroke survivors.
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What causes a stroke?
Stroke: when part of the brain does not blood and oxygen it needs and cells begin to die within minutes
Ischemic Stroke: blockage of blood vessels Cerebral thrombosis: growth of stationary clot Cerebral embolism: wandering clot
Hemorrhagic Stroke: bleeding in brain Ruptured aneurysm
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Risk Factors For Stroke
High blood pressure Smoking Diabetes Carotid Artery disease Some blood disorders (sickle cell disease) High blood cholesterol Physical inactivity High alcohol consumption
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Hypertension
Definition Diastolic Blood Pressure
> 90 mm Hg Systolic Blood Pressure
> 140 mm Hg Desirable < 120/80 New 2003 definition:
DBP: 80-90 or SBP: 120-140 Prehypertension
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Hypertension and Disease
Stroke 2/3rds with first stroke have HPT 7 times more likely than normal
Coronary heart disease 1/2 with first MI have HPT 3 times more likely than normal
End-stage Renal FailureBlindness
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Hypertension
Prevalence 50 million > one quarter of adults
Of people with hypertension 30% are unaware of it 34% are on medication and have it under control 25% are on medication and still have hypertension 11% are not on medication
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Risk Factors
Age Risk increases with age
Ethnicity Risk higher among African-Americans
Family HistoryObesity
Risk higher in overweight and obese
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Dietary Treatment for Hypertension
Weight LossModerate weight lossRegular exercise
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Weight Loss vs. Medication
-40
-35
-30
-25
-20
-15
-10
-5
0
5
Weight Loss Medication Placebo
SBP
DBP
LVM
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Dietary Treatment for Hypertension
Salt and Sodium NaCl is 40% Na
Is the (recommended) amount in mg sodium mg sodium chloride
~50% responsive Salt restriction doesn’t work for everybody
Salt restriction and prevention of hypertension debate
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Diet and Hypertension
Salt Recommendations WHO: < 6 g/day (2400mg Na/d)
` 1 tsp salt
Salt Intake US: 8 g/day (3200mg Na/d) Asia: 30-40 g/day
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Sources of Salt
10% unprocessed foods15% added by consumer75% in processed foods
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Salt in Processed Foods
Foods prepared in brine Pickles (1700mg/pickle), sauerkraut (940mg/c)
Smoked and cured meats Ham (1200mg/3oz), bacon (300mg/3 slices)
Salty snacks Chips (170mg/oz)
Highly processed foods Fast foods (950mg/BigMac) Sauces and condiments (180mg/Tcatsup) Canned and instant soups (1100mg/c CNS)
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How do you eat a low sodium diet (<1800 mg/day) ????
Teriyaki sauce: 700 mg/T BBQ sauce: 425 mg/ 2T Polish sausage: 2000 mg Italian salad dressing: 200 mg/T Pepperoni pizza: 880 mg/slice Apple pie: 330 mg/slice Canned pasta w/ sauce: 800 mg/serving Frozen buttermilk pancakes: 370 mg/serving
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Other Dietary Treatments for Hypertension
Alcohol < 1-2 servings per day >2 servings increases risk of hpt
Potassium fruits and vegetables
Fish Oils Calcium
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The DASH Dietp 410-411
Dietary Approaches to Stop Hypertension 1997 DASH trial -NHLBI Diet rich in
fruit vegetable grain products
Low/non fat dairy, fish and meats
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DASH-Na TrialNEJM (1/4/01)
412 mild hypertensive adults30 day intervention
DASH vs Control Diet Low, Intermediate, High Sodium
(1200, 2300, 3500 mg Na/d)
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The DASH Diet
For 2000 Calorie/day diet:Grain products: 8 servings (6-11)Vegetables: 5 servings (3-5)Fruits: 5 servings (2-4)LF/NF Dairy: 3 servings (2-3)LF Meats: 2 servings (2-3)Nuts, seeds, legumes: 1 serving
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DASH-Na Conclusions
DASH diet lowers BP Sodium reduction lowers BP Combination of DASH and Na reduction
effects greater than separately DASH+low-Na reduced Systolic BP by:
11.5mm Hg in Hpt subjects7.1 mm Hg in borderline Hpt subjects
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DASH-Na Conclusions
Benefits seen with men and women blacks and non-blacks hypertensive and borderline hypertensive
A 2 mm Hg drop in DBP results in: 17% reduction in Hpt 6% reduction in CHD risk 15% reduction in stroke risk
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http://www.nhlbi.nih.gov/health/public/heart/hbp/dash/index.htm
DASH has also been shown to:
Reduce risk of heart disease by-reducing blood pressure-Decreasing LDL-C
-Reduce body weight in -overweight subjects
-Improve glucose control -In diabetics
-Contain dietary components that -Reduce risk of cancer
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Diet and Cancer
Definitions Cancer: uncontrolled growth and spread of
abnormal cells Tumor: mass of cancer cells
benign tumor (non-harmful, non- invasive) malignant tumor (harmful, invasive)
Metastatic Cancer: spreading to other tissues
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Cancer Facts
US men have a 1 in 2 lifetime risk US women have a 1 in 3 lifetime risk 1,220,000 new malignant cancer cases in
2000 552,000 cancer deaths in 2000
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Cancer TrendsJNCI, 1999
1990-1996All cancer incidence declined by
2.2% -4.1% males -0.5% females
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US Male Cancer Death Rates by Site
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US Women Cancer Death Rate by Site
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Cancer in Women
020406080
100120140160180200
Lung Colon Pancreas Uterus
Deaths
New Cases
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Cancer RatesRacial Differences
0
50
100
150
200
250
300
350
400
450
Blacks Cauc. Hisp. Asian Indian
Incidence
Mortality
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The Cancer Development Process
Initiation Alterations in DNA/gene mutation
Multiple genes must be altered for cancer to occur minutes - days Causes: Exposure to Carcinogens
radiation chemical viruses
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The Cancer Development Process
Promotion “locking in” DNA alterations/gene mutations
Genes affecting cell differentiation Cancer cells are de-differentiated from cells they come from
Genes affecting cell division Cancer cells divide uncontrollably
failure of DNA repair mechanisms cancerous cells begin to divide months - years
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The Cancer Development Process
Cancer ProgressionUncontrolled growth of cancer
cellsmalignancy and metastasisweeks to years
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Diet and Cancer Development
Initiation Dietary sources of carcinogens & pre-
carcinogensaflatoxin mold from peanutsbenzopyrene from charbroiled meatsnitrosamine from cured meats
Dietary Protection antioxidants dietary fiber
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Diet and Cancer Development
Promotion Dietary promoters of cancer
Fat and PUFAexcess alcohol
Dietary anti-promoters of cancervitamins & phytochemicals
Progression Dietary factors increasing cancer progression
excess Fat and calories
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Diet and CancerACS 2000
One third of cancer deaths in US is due to cigarette smoking
One third of cancer deaths in US is due to diet
5-10% of cancers are hereditary
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Folate and Colon Cancer
Harvard Nurses’ Health Study 1998 89,000 women
If consumed >400 ug folate -> 30% lower risk than those consuming <200 ug folate
If consume folate supplements daily for 15 years -> 75% lower risk supplements more bio-available consumed more total folate
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1999 ACS Dietary Guidelines
Choose most of the foods you eat from plant sources. Five A Day low in fat and calories high in folic acid, vitamin C, beta-carotene high in fiber high in phytochemicals
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ACS Dietary Guidelines
Limit your intake of high-fat foods, particularly from animal sources dietary fats are cancer promoters colon, prostate, endometrial cancers linked to high
intake of animal fats cured and smoked meats contain carcinogens
Nitrosaminesbenzopyrenes
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ACS Dietary Guidelines
Be Physically Active: achieve and maintain a healthy weight
Obesity associated with most cancers
Exercise and Dietary Modifications
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Overweight, Obesity, and Mortality from Cancer in a
Prospectively Studied Cohort of U.S. Adults NEJM 348:1625(April 2003)
900,000 adults Prospective study, free of cancer
Self reported height/body weight in beginning 16 year follow up ~57,000 cancer deaths
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Obesity and Mortality from CancerNEJM April 2003
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ACS Dietary Guidelines
Limit consumption of alcoholic beverages, if you drink at all.
Associated with: Breast cancer Mouth and throat cancers Liver cancer
Effect of smoking and alcohol are more than additive (synergistic)
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Dietary GuidelinesAmerican Heart Association
Heart disease and strokeAmerican Cancer Society
CancersAmerican Diabetes Association
General Agreement !