Obesity and Weight Management Flashcards

1
Q

What is obesity?

A

A chronic,
progressive, relapsing, and treatable multifactorial, neurobehavioral disease,
wherein an increase in body fat promotes adipose tissue dysfunction and
abnormal fat mass physical forces, resulting in adverse metabolic,
biomechanical, and psychosocial health consequences

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2
Q

How to classify obesity?

A

BMI

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3
Q

What are the classifications of BMI?

A
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4
Q

What is the Edmonton Obesity Staging System (EOSS)?

A
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5
Q

What is the American Association of Clinical Endocrinologists
Obesity Classification?

A
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6
Q

More than ___% of adults in the US are obese

A

40%

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7
Q

Obesity is the ___ leading cause for preventable death

A

Second

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8
Q

What are some contributing factors to obesity?

A

Genetic, environment, development, behavior

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9
Q

Describe the genetics of obesity

A

Monogenic vs. polygenic

Monogenic: early onset, severe obesity, rare, variation in single gene, alleles with high penetrance, no environmental influence

Polygenic: common, modest genetic influence, several variants, alleles of low penetrance, environment is a key factor in
expression

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10
Q

What are some genetic abnormalities and syndromes that are associated with obesity?

A
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11
Q

What is MC4R deficiency?

A

Hyperphagia, accelerated linear growth, insulin resistance

Autosomal dominant or recessive

Most common form of monogenic obesity

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12
Q

What is POMC Deficiency?

A

Hyperphagia, ACTH deficiency, hypopigmentation, pale skin, red hair

Autosomal recessive

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12
Q

What is leptin deficiency?

A

Hyperphagia, hypogonadism, absence growth spurt, impaired T cell function

Autosomal Recessive

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13
Q

What is Bardet-Biedl Syndrome?

A

Hyperphagia, vision loss, polydactyly, hypogonadism, renal disease, metabolic syndrome

Autosomal recessive

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14
Q

What is Cohen Syndrome?

A

Central obesity with thin arms/legs, small head with thick hair, eyebrows,
eyelashes, developmental delay, retinal dystrophy, joint hypermobility,
overly friendly behavior, neutropenia

Autosomal recessive

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15
Q

What is Prader-Willi Syndrome?

A

Hypotonia and poor feeding at birth, hyperphagia develops at 2 years,
thin face with almond shaped eyes, short stature with small
hands/feet, delayed development and intellectual impairment,
hypogonadism

Parental chromosome 15 partial loss of function (usually not inherited)

Most common form of syndromic obesity

Significant increase in ghrelin in PWS

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16
Q

What is Albright’s Hereditary Osteodystrophy?

A

Short stature, round face, dental abnormalities, shortened fingers/toes,
pseudohypoparathyroidism

Associated with genetic imprinting in an autosomal dominant manner

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17
Q

Describe specific epigenetic factors that play into obesity

A

DNA methylation, histone modification, RNA based mechanisms

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18
Q

Describe specific environmental factors that play into obesity

A

Diet, activity, aging, smoking, toxin exposures, sleep, stress, learned patterns

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19
Q

Describe specific social factors that play into obesity

A

Lack of green space, lack of safety, food deserts, food insecurity, low socioeconomic status, low education,
dietary

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20
Q

What are the forms of energy expenditure?

A

Resting metabolic rate - 60%

Physical activity - 30%

Thermic effects of food - 10%

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21
Q

What are the signaling pathways for the gut-brain axis?

A
  1. Hormonal
  2. Neuronal (vagus nerve)
  3. Orexigenic (appetite stimulant)
  4. Anorexigenic (appetite suppressant)
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22
Q

What role does our brain play in appetite
regulation?

A

Homeostatic eating: when we are
depleting our energy stores we have
increased motivation to eat

Hedonic eating: increased desire to
consume foods that are
highly palatable

Executive function: overriding any signaling and
deciding to eat or not eat

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23
Q

What are some hormonal factors that are involved in appetite regulation?

A
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24
What are orexigens?
Appetite stimulants - increase intake
25
What are some examples of orexigens?
Neuropeptide Y (NPY) Agouti-related protein (AgRP) Orexin A and Orexin B Melanin-Concentrating Hormone (MCH)
26
What are anorexigens?
Appetite suppressants - reduce intake
27
What are some examples of anorexigens?
Proopiomelanocortin (POMC) Cocaine amphetamine regulating transcript (CART) Alpha melanocyte stimulating hormone (alpha-MSH) Brain derived neurotrophic factor Serotonin
28
What is ghrelin?
Growth Hormone Release Inducing Peptide AKA "the hunger hormone" Orexigenic Signal to release ghrelin is an empty stomach Levels increase and peak prior to eating, levels decrease when nutrients are ingested
29
What increases ghrelin?
Fasting, weight loss, stress and sleep deprivation, genetic syndromes
30
What reduces ghrelin?
Meals, weight gain (stomach stretching), leptin, sleeve gastrectomy
31
What is cholecystokinin (CCK)?
Produced by l-cells in proximal small bowel (duodenum/Jejunum) Secreted after fat/protein ingestion and stomach distension Short acting peak at 15-30 minutes from meal initiation Stimulates gallbladder contraction, slowing stomach emptying, reducing appetite Receptor in GI tract and brain
32
What is Glucagon-Like Peptide 1 (GLP-1)?
Produced by L-cells of the ileum and proximal colon Secretion stimulated by nutrients, neural, and endocrine factors after eating GLP-1 receptors found in heart, kidney, lung, pancreas, CNS, PNS It is an incretin, anorexigenic GLP-1 levels are reduced in obesity, prediabetes, type 2 diabetes
33
What is Glucose-Dependent Insulinotropic Polypeptide (GIP)?
AKA gastric inhibitory peptide Incretin hormone, released by K cells in the duodenum and upper jejunum Released in response to oral glucose load **GIP and GLP-1 together are responsible for up to 70% of the postprandial insulin response** Reduces nausea and stimulates glucagon secretion
34
What is Oxyntomodulin (OXM)?
Incretin, produced by L-cells in distal small intestines and colon Co-secreted upon eating (made by same precursor as GLP-1) Produced postprandially and actives multiple receptors Exogenous administration can cause weight loss (decreasing appetite and feeding, increasing energy expenditure)
35
What is Peptide YY (PYY)?
Anorexigenic, produced by L-cells in distal small intestine, colon and rectum Potent appetite suppressant Increases within 1 hour of feeding; delays gastric emptying and intestine transit time
36
What is Pancreatic Polypeptide (PP)?
Released in response to calorie load; reduces gastric emptying in gut and reducees hunger expression in hypothalamus Low levels in fasting state Patients with obesity and Prader Willi Syndrome have lower levels of PP
37
What is insulin?
Released in response to eating It is one of the long-term adiposity signaling hormones Centrally reduces appetite in hypothalamus Similar effect to leptin in the CNS but less potent Resistance attenuates weight loss effects centrally In muscles: uptakes glucose (glycogen), uptake amino acids (protein) In liver: stimulates uptake glucose (glycogen), inhibits conversion fat and protein (glucose) In adipose: stimulates fat synthesis
38
What is amylin?
Amino acid hormone co-secreted with insulin by beta cells, makes insulin more effective Secreted in response to meals Regulates glucose and bodyweight by reducing food intake, slowing gastric emptying, suppressing glucagon production in the liver Effects are similar to GLP-1 (milder glucose reduction and weight loss)
39
What is leptin?
Secreted by adipocytes in white adipose tissue; secretion is diurnal Major role in energy balance Circulating levels directly proportional to body fat mass Crosses BBB and binds to the hypothalamic leptin receptors Can activate the sympathetic nervous system Interacts with gonadotropin pulse generators in the hypothalamic pituitary gonadal axes Has regulation of immune function, hematopoiesis and angiogenesis
40
What is adiponectin?
Improves insulin sensitivity in skeletal muscle, improves insulin sensitivity in liver, reduces vascular inflammation Most abundant hormone secreted by adipocytes Levels inversely related to body fat mass Liver activity: enhances insulin sensitivity, decreases non-esterified fatty acids, increases fatty acid oxidation, reduces liver glucose output Muscle activity: stimulates glucose use and fatty acid oxidation Vascular endothelium activity: inhibits monocyte adhesion, inhibits macrophage
41
How does a lap band procedure impact gut hormones?
Increases ghrelin, increases PYY, reduces insulin, reduces leptin
42
How does a gastric sleeve procedure impact gut hormones?
Large reduction ghrelin, increases GLP-1, increases PYY, decreases insulin, decreases leptin
43
How does a gastric bypass procedure impact gut hormones?
Variable ghrelin, large increase in GLP-1, increases PYY, increases OXM, reduces Insulin, reduces Leptin
44
What are some metabolic manifestations of obesity?
45
Chronic positive energy balances lead to?
Adipocyte hyperplasia (lots of small adipocytes) Adipocyte hypertrophy (few large adipocytes)
46
What are weight circumference classifications?
47
What are 5 criteria for metabolic syndrome?
48
Obesity may (increase/decrease?) pro-inflammatory macrophages
Increase M1 Macrophages increase with obesity and secrete proinflammatory factors (TNF, IL-6, MCP-1) M2 macrophages predominate in lean individuals and secrete anti-inflammatory factors In obesity M1/M2 proportion is polarized towards proinflammatory
49
50
What is hepatosteatosis (MASLD: metabolic dysfunction associated steatotic liver disease AKA NAFLD)?
Mitochondrial dysfunction and endoplasmic reticulum stress create reactive oxygen species, releasing cytokines, insulin resistance and cellular apoptosis Increases in circulating proinflammatory factors and decreases in anti-inflammatory factors may promote inflammation and liver fat accumulation
51
What is hepatosteatitis (MASH)?
Hepatocyte injury and death from intracellular accumulation of fatty acids, cholesterol and other toxic lipids and from ROS Cellular death promotes inflammatory responses Fibrosis develops --> cirrhosis --> end stage liver disease --> increases risk of need for liver transplant and hepatocellular carcinoma
52
Evaluating obesity and liver disease (labs)?
Fasting glucose, A1c, hepatic panel, fibrosis 4 index panel, serum biomarkers, imaging, liver biopsy Liver biopsy is gold standard to assess fat and fibrosis but is not routinely done
53
What is the relationship between obesity and cardiovascular disease?
Increased visceral and epicardial fat increase the risk of atherosclerotic CV disease --> increased coronary artery calcification Increased fat mass compress veins and impair venous blood return which increases/promotes thrombosis Cardiac remodeling (LVH, atrial enlargement, fat deposition --> fibrosis) Activation of sympathetic nervous system increases BP Activation of the RAAS causing elevated BP Inflammatory effects --> vasoconstriction and arterial stiffness Reduction in HDL, increase in LDL, increase in VLDL, increase in small, dense LDL particles
54
What is the relationship between obesity and sleep apnea?
> 80% of adults with OSA are overweight >>50% of adults with OSA have obesity Is a vicious cycle Alter in the circadian system --> altered feeding, changes to body composition, increased blood sugar, higher blood pressure, higher cholesterol, increased risks of heart disease and stroke
55
What is the relationship between obesity and osteoarthritis?
Obesity increases the load and impact on the cartilage of the knee Obesity also causes systemic metabolic factors and adipokines may influence cartilage homeostasis Obesity/overweight also risk factor for hip OA Can be worse for women in perimenopause/menopause/postmenopausal
56
Is there an associated between obesity and cancer?
Yes
57
What is the relationship between obesity and perimenopause/menopause?
Declining estrogen = increased leptin, decreased ghrelin and NPY Body composition changes (increased fat mass, increased adiposity, loss free fat mass) Increased risks of CV disease (2-4 x higher rates) Elevated blood pressure, elevated LDL, weight gain, loss lean muscle mass, reduced activity levels, dietary changes, food preference changes Sarcopenic obesity
58
What is the relationship between obesity and stress?
Long-term stress can result in an increase in hypothalamic corticotropic activity: increases in blood cortisol, can worsen sleep patterns, increase food cravings Increase BP, worsen metabolism, cause dysregulation in the immune responses
59
Greater weight loss (improves/worsens?) obesity-related complications
Improves
60
What are important history components to obtain for obesity?
Notes: EtOH has a lot of empty sugars, traveliing a lot and thus eating out/fast food a lot?
61
Physical exam components for obesity?
Vitals: height, weight, BP, BMI, HR, respirations, O2, waist circumference, hip circumference, neck circumference
62
Labs for diagnostic testing for obesity?
CBC, CMP, fasting lipids (esp. triglycerides and HDL), A1c, TSH, vitamin D Of note: accurate triglycerieds needs to be from a fasting state
63
Additional diagnostic labs to consider for obesity
64
Additional diagnostic labs to consider for obesity
65
What are some examples of body composition evaluations?
66
What is fat-free mass?
Total body mass (muscle, organs, water, bones, ligaments, tendons) Includes water, mineral, protein and glycogen DXA measures fat, soft tissue and bone FFM = total mass - fat mass
67
What is lean body mass?
Total body mass (muscles, organs, water, bones, ligaments, tendons), less non essential or storage adipose tissue Includes water, mineral, protein, glycogen, essential fat in organs, CNS and bone marrow Usually only differs from FFM by ~5% Total body mass = fat mass + lean mass + bone mass Lean mass = total mass - fat mass-BMC % body fat = Fat mass/(total body mass-bone mass)
68
What are types of energy expenditures?
Basal metabolic rate, resting metabolic rate, cellular respiration, direct calorimetry, indirect calorimetry
69
What is basal metabolic rate?
Energy expended while fasting, rested and supine in thermoneutral environment
70
What is resting metabolic rate?
Energy expended at rest, doesn’t require overnight supine measurement
71
What is cellular respiration?
Converts biochemical energy like food into heat and cellular energy
72
What is direct calorimetry?
Measure heat generated by organism, measures difference in temperature of water entering and leaving the chamber via heat exchanger Value of generated heat can estimate total energy expenditure Enclosed calorimeter
73
What is indirect calorimetry?
Estimate basal EE and resting EE by measuring O2 consumption VO2 and CO2 production VCO2
74
Resting metabolic rate can be estimated by what types of equations?
Most common: Harris-Benedict, Mifflin St. Jeor
75
Physical activity can be measured or estimated by?
Activity records as data to validated EE tables Calculations based on HR Motion sensors (pedometers) Accelerometers
76
How to structure obesity treatment (hint: pyramid)?
77
Lifestyle modifications for obesity treatment?
Eating plans/Nutrition Activity Behavior techniques Other health factors Stress management Sleep
78
What are the 3 macronutrients?
Carbohydrates, lipids, fats
79
Describe carbohydrates
Source of energy and provide cellular structural elements Includes: **starches, sugars, fiber** 4 kcal/gram (except for fiber) **Satiation is dependent on presence of fiber** Glucose stored as glycogen in muscle and liver. If positive caloric balance then glucose converted to fat in the liver and is stored as adipose tissue Dietary reference intake: at least 130 g per day Simple: mono and disaccharides - table sugar, dairy products, malt sugar. Broken down during digestion into glucose, galactose, fructose Complex: poly and oligosaccharides; starches and high fiber foods like whole grains, beans, fruits/vegetables **Whole grain carbs REDUCE CVD risk** 45-65% total daily intake
80
Describe dietary fiber
Is a carbohydrate **Some are fermentable** - low, moderate and high: low (cellulose, hemicelluloses, wheat bra), moderate (beta-glucans, gums, pectin, resistant starch), high (inulin, oligofructose) Soluble, viscous fiber could help reduce blood cholesterol and improve glycemic control **Fiber can also increase satiety and help gut microbiome** 20-35 grams per day
81
Describe other types of sugars/carbohydrates
Glucose is a simple sugar found in fruit (glycemic index of 100) Fructose is found in fruit (GI of 25) Sucrose (disaccharide of glucose + fructose derived from sugar cane or beets) has GI of 65 High fructose corn syrup: artificial sweetener, derived from corn starch glucose syrup processed into fructose; is a liquid containing unbound glucose and fructose and has a GI of ~70 Excessive intake of HFCS can lead to obesity, FLD, hypertriglyceridemia and DM Limit added sugars to < 10% total daily intake
82
Describe fats
Used as energy source for many metabolic processes including immune response, cell membrane, brain, synthesis of bile acid, cholesterol, vitamin D and steroid hormones and for insulation Dietary reference intake: at least 30 g/d Polyunsaturated, monosaturated, transsaturated, saturated Essential fatty acids are Omega 3 and Omega 6 fatty acids Endogenously derived essential fatty acids like EPA, DHA (both omega 3 fatty acids), and Gamma linolenic acid (omega 6 fatty acid) 20-35% total daily calories
83
What are transsaturated fats?
**INCREASE CVD risk** Artificially are partially hydrogenated vegetables oils, naturally are conjugated linoleic acid from ruminants and has no detriments to health. Artificials are associated with increased LDL, reduced HDL, increased CV disease, diabetes and cancers. Can find them in microwavable foods, margarine, crackers, fried fast foods, frozen pizza
84
What are saturated fats?
Short chain: created and absorbed in intestine as result of fiber fermentation, medium chain - transported into portal vein after digestion and can induce ketosis (MCT oil tx of epilepsy) Long chain: found meats, dairy, tropical oils, hydrogenated vegetable oils like shortening
85
What are polysaturated fats?
**REDUCE CVD risk** Simple molecules, plant based oils typically liquid at room temp, they provide essential fats like Omega 6 and Omega 3. Nuts contain both poly and monounsaturated fats
86
What are monosaturated fats?
**REDUCE CVD risk** Liquid at room temp, found in plant foods (nuts, avocados, olives, canola oils, vegetable oils)
87
Describe proteins
Contains 4 kcal/gram Amino acids, serve as building blocks Essential AA are those we cannot make and must consume Protein restriction may delay progression to dialysis for CKD patients Protein deficiency: Kwashiorkor Dietary reference intake 0.8-2.0 grams/kg/day (dependent on age, gender, activity, health) Complete proteins have all 9 essential amino acids Incomplete proteins lack 1 or more AA but can be combined to form a complete protein 10-35% of total daily intake
88
What is a good rule of thumb for macronutrient ratios?
30/30/30 30% carb, 30% fats, 30% protein
89
What does calorie restriction look like?
Low Calorie: Women 1000-1200 kcal/d, Men 1200-1600 kcal/d
90
Describe fat restriction
Fat restriction: low fat < 30% fat calories OR very low fat: < 10% fat calories to minimum of 30 g/day After 6 months can produce similar weight loss ot low carb diet May reduce fasting glucose, insulin level and modest reduction in BP Modest decrease in LDL and HDL Risk of deficiency if consuming <30 g/d or 270 kcal
91
Describe carb restriction
Carb restriction: low glycemic OR low carb:< 130 g/d or < 26% calories OR very low carb: < 50 g/d Modest weight loss for first 6 months, after that weight loss is similar to other calorie restricted diets Reduces fasting glucose, insulin and triglycerides Increases HDL and may lower LDL Modest reduction in BP Metabolic changes with or without weight loss Epilepsy patient’s using the very low carb/ketogenic diet can reduce seizures Low carb may improve DM complications like neuropathy May induce gout flares, could result in malaise, could be challenging in patients with protein restriction (CKD), monitor for low blood sugar and BP and adjust meds as needed
92
Describe very low calorie weight restriction
< 800 kcal/d **CLINICAL SUPERVISION SHORT DURATION** Meal replacements May need supplementation due to micronutrient deficiencies Produces rapid weight loss **Beneficial for pre surgical preparation** Reduces fasting glucose, insulin and triglycerides, increases HDL, decreases LDL, reduces BP Adverse effects - fatigue, nausea, constipation, diarrhea, hair loss, brittle nails, cold intolerance, dysmenorrhea, slight increased risk of gallstones, kidney stones and gout flares **Increased risk of cardiac dysrhythmias and muscle cramping** if micronutrient deficiencies Weight regain will occur if not taught how to maintain when transitioning back to different diet
93
Describe the Mediterranean diet
Olive oil as main source of fat Vegetables 3-9 servings Whole fruit 0.5-2 servings Whole grains/legumes 1-13 servings per day Moderate intake of red wine Moderate consumption of seafood, fermented dairy products, poultry, nuts, seeds, eggs Limit red meat, meat products, ultra processed carbs Saturated fats minimal
94
Describe the DASH diet
Dietary approaches to stop hypertension Primarily to treat HTN/High BP Vegetables, fruits, whole grains, fat free or low fat dairy, fish, poultry, lean meats, nuts, seeds, legumes, fiber, calcium, potassium, magnesium Limit sodium 1500-2300 mg/d Limit total fat ~27% total calories per day Limit saturated fat < 6% total daily calories Limit cholesterol < 150 mg per day for 2100 calorie eating plan (adjust accordingly) Avoid red and processed meats, sugar sweetened beverages, and foods with ADDED sugars
95
Describe the Therapeutic Lifestyle Change diet
Low fat meal plan recommended by National Cholesterol Education program, Adult Treatment Panel Utilized in lipid clinical trials Includes physical activity and smoking cessation Total fat: 25-35% daily calories Limit sat fat < 7% Limit cholesterol < 200 mg/d Avoid trans fatty acids
96
Describe the ornish diet
Very low fat restriction, foods eaten in natural form Vegetables, fruits, legumes, whole grains Small meals eaten frequently Limit dietary fat < 10% total daily calories Dietary cholesterol < 10 mg per day Limit sugar, sodium, alcohol Avoid animal products and caffeine Avoid trans fatty acid, refined carbs, and oils
97
Describe the vegetarian diet
Foods that come mostly from plants AVOID ultra processed foods, fried foods, and refined carbs - negates the benefits of vegetarian diets Monitor for deficiencies like Vitamin B12
98
What are subtype of the vegetarian diet?
Vegan: ONLY plant based foods, no animal proteins or by products Lacto vegetarian: plants + some or all dairy products Lacto-ovo vegetarian: plant, Dairy and eggs Semi or partial vegetarian: plant, may include some chicken/fish, dairy, eggs, NO red meat Pescatarian: plant + seafood Flexitarian: mostly plant based, occasional fish, meat, animal products
99
Describe the paleolithic ("paleo") diet
Based on diet presumed to have excited during the Paleolithic period EXCLUDES grains, dairy, ultra processed foods Fresh vegetables, fruits, root vegetables Grass fed lean red meats, fish and seafood, eggs, nuts/seeds Naturally produced oils (olive, walnut, flaxseed, macadamia, avocado, coconut) AVOID: cereal grains, legumes (includes peanuts), dairy, potatoes, ultra processed foods, refined sugars, refined oils, and salt
100
Describe the ketogenic diet
Car-restriction promoting utilization of fat for energy, generates ketosis Encourage balance of saturated, monounsat and polyunsaturated fats Need vitamin and fiber supplementation Avoid ultra processed, refined, high glycemic index, trans fatty acid foods Generally limit cereals, breads, grains, dairy ( except cheese), starchy vegetables, most fruits Benefits: weight loss, reduce hunger, lower postprandial glucose and insulin, may improve glucose metabolism (insulin sensitivity, reduced fasting glucose and insulin), reduce diastolic BP, reduce TG and increase HDL, ketonemia can treat seizures, adjunct to certain kinds of cancer therapy Risks: may increase LDL (can avoid by eating polyunsat versus sat fats), no improvement in insulin sensitivity if no weight loss, transient fatigue, mild decrease in cognition (upon start of diet), physical performance changes
101
What are the phases of the keto diet?
Induction phase: <= 20 g carbs per day non starchy vegetables, leafy greens and adequate protein to reduce insulin and generate ketosis Ongoing weight loss phase: wider variety vegetables, seeds, nuts and low glycemic whole fruits like strawberries and blueberries Pre Maintenance Phase: once goal weight achieved, allow carb intake to slowly increase while monitoring weight Maintenance phase: 60-90 g of carbs per day if weight and health maintained; may include legumes, whole grains and whole fruits
102
Is intermittent fasting and time-restricted eating as effective as continuous calorie restriction?
Yes
103
What are advantages of intermittent fasting and time-restricted eating?
Reduced decision fatigue, quickly reversible, may fit better in day to day schedule, may reduce caloric intake, may improve metabolic parameters and reduce body weight
104
What are disadvantages of intermittent fasting and time-restricted eating?
Does not necessarily emphasize “healthy” meal quality, may not want to use in patients with eating disorder history, increases risk of hypoglycemia, no great evidence of sustainability, long-term evidence of benefits/safety/efficacy from animal studies, Prolonged fasting may promote gout, urate nephrolithiasis, postural hypotension and dysrhythmias
105
What are physical activity recommendations per week?
150-300 minutes + moderate-intensity activity OR 75-150 min+ vigorous intensity activity per week Muscle strengthening activities 2+ days per week Moderate intensity: brisk walk, raking yard, etc Vigorous intensity: running, weight lifting, fitness class Moderate or vigorous: swimming, bicycling For clinically significant weight loss and maintenance activity should be 250 min or greater per week Resistance training can improve the proportion of fat to fat free mass loss Without weight loss it still improves health risk
106
What are some behavioral techniques for weight managment?
Motivational interviewing Having empathy Going through the 5 A’s Address body image Why do we eat like we do?: physiologic, stress, emotions, timing, environment, information gap, reward Why DON’T we engage in routine activity?: physical symptoms, lack of time, not interested, support, inadequate education, financial, accessibility Elements for success: doable, evidenced base, measurable, accountability, ownership, frequent encounters (medical professionals), education, setting goals, non scale goals, self monitoring, stimulus control, addressing body image, creating plan to change cognitive patterns, rewards, stress mgmt, health care team, group support, weight loss programs, use of technology and social media and telemedicine Stress management Improving sleep Mindful eating
107
Meds that can cause obesity
Beta blockers, calcium channel blockers, insulin, sulfonylureas, steroids, progestion contraceptives, gabapentin, valproate, some antipsychotics, lithium, some SSRIs and SNRIs, many others...
108
Obesity meds
Phentermine/topiramate, liraglutide, semaglutide, naltrexone/bupropion, tirzepatide, orlistat
109
Phentermine
Lomaira/Adipex Reduces appetite CI: uncontrolled HTN, uncontrolled anxiety, CV history, hyperthyroidism, there is risk mania, pregnancy Monitor: BP, pulse, EKG (person dependent) AEs: constipation, dry mouth, headache, insomnia, anxiety, jitteriness, palpitations, elevated HR and BP Caution > 65 years old FDA approved, approved for pediatrics
110
Topiramate
Topamax Disinterest in food, reduces cravings, less food thoughts Think about using in patients with migraines, insomnia, pain CI: hx of calcium kidney stone, glaucoma, cognitive impairment, risk of birth defects (teratogenic) Monitor: BMP, mental status AEs: drowsiness, paresthesia, memory issues, word finding difficulty, taste changes Caution in elderly, CKD, uncontrolled depression Rare risk of metabolic acidosis **NOT FDA approved**
111
Phentermine/Topiramate
Qsymia CI: same as individual medications Monitoring: same as individual medications AEs: same as individual medications FDA approved, approved for pediatrics
112
Lisdexamfetamine
Vyvanse Causes appetite suppression CI: uncontrolled HTN, anxiety, CV history, risk mania Monitor: BP, pulse, EKG AEs: constipation, dry mouth, headache, insomnia, anxiety, jitteriness, palpitations, dizziness, nausea, vomiting, increased HR, anorexia Caution> 65 years old Use for moderate to severe binge eating disorder and ADHD Approved for pediatrics
113
Naltrexone
Revia Works in mesolimbic reward pathway to decrease cravings Dose around time of largest cravings CI: if taking opioids, upcoming surgery, severe hepatic injury Monitor: LFTs AEs: nausea, dizziness, headaches, anxiety, insomnia is limited **NOT FDA approved**
114
Naltrexone/Bupropion
Contrave Naltrexone mechanism + bupropion mechanism which stimulates POMC reducing hunger. CI: concurrent use MAOI, opioids or CYP2B6 inducers, hx of seizures, active bulimia/anorexia, uncontrolled HTN/anxiety Monitor: BP, HR, LFTs, mental status Hepatic and renal dosing AEs: headache, insomnia, nausea, constipation, vomiting, dizziness, dry mouth, tremor
115
Orlistat
Xenical or Alli Mechanism: GI lipase inhibitor that impairs digestion of dietary fat AEs: oily stools, oily flatus worse after fatty meals. Can promote kidney and gallstones and malabsorption of fat soluble vitamins CI: chronic malabsorption syndrome and cholestasis Drug interactions: cyclosporine, oral contraception, anti seizure medications, thyroid hormone, warfarin Not often used d/t AEs FDA approved, approved for Peds
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SQ Peptide Medications
Ex: GLP/GIP (semaglutide/Wegovy; liraglutide/Saxenda) CI: personal or FH medullary thyroid carcinoma, MEN2, idiopathic/chronic pancreatitis or pancreatitis from GLP 1 agonist. Exenatide if GFR< 30 ml/min Monitor: A1c, blood sugars as needed, BMP AEs: nausea, diarrhea, constipation, headache, heartburn, gallstones, pancreatitis, gastroparesis, fatigue Tirzepatide/Zepbound: weekly 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, 15 mg FDA approved, semaglutide and liraglutide approved for pediatrics
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Non-Systemic Oral Hydrogel
Biodegradable oral non-systemic superabsorbent hydrogel Promotes fullness CI: pregnancy, hx of reaction to cellulose, citric acid, sodium stearyl fumarate, gelatin, titanium oxide AEs: abdominal pain, constipation, flatulence, infrequent bowel movements, abdominal distension, diarrhea, nausea FDA approved
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Setmelanotide
Imcivree Melanocortin-4 receptor agonist: use in those with Bardet-Biedl syndrome (clinically diagnosed), POMC, PCSK1, LEPR deficiency (must be confirmed by genetic testing) Discontinue if after 12-15 weeks of tx there is not at least 5% loss of baseline bodyweight AEs: injection site reaction, skin hyperpigmentation, nausea, headache, diarrhea, abdominal pain, back pain, fatigue, vomiting, depression, URI, spontaneous erections FDA Approved
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Metreleptin Subcutaneous Injection
Myalept Leptin Analog Adjunction to diet to treat complications of leptin deficiency Not indicated for patients with NASH or HIV related lipodystrophy CI: hypersensitivity, general obesity not associated with congenital leptin deficiency AEs: headache, hypoglycemia, decreased weight, abdominal pain
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Types of bariatric surgery
VSG (Vertical Sleeve Gastrectomy) RYGB (Roux-en-Y gastric bypass) LAGB (Laparoscopic Adjustable Gastric Banding) Balloons 4,358 (1.6%) Revision
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Who should undergo surgery?
BMI >= 40 Those who are not responding to non surgical weight loss management AND BMI >=35 regardless of comorbidities BMI 30-34.9 and metabolic disease BMI >=27.5 in Asian populations Appropriate pediatric patients
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Who should not undergo surgery?
Severe heart failure, unstable CAD, end-stage lung disease, Active cancer treatments, portal hypertension, decompensated liver cirrhosis, drug and alcohol dependency
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Vertical Sleeve Gastrectomy (VSG)
Most common surgery **Can worsen GERD and Barretts** Favorable changes in gut hormones for hunger, satiety, blood sugar control Common deficiencies: Vitamin B1, B9, B12, D, Iron
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Roux-en-Y Gastric Bypass (RYGB)
Favorable changes in gut hormones and neuroendocrine signaling Bypasses part of the small intestine which limits absorption **Resolves GERD** Good for those at higher BMI, GERD, and Type 2 diabetes Common Deficiencies: Vitamin B1, B9, B12, D, calcium, Iron
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Laparoscopic Adjustable Gastric Banding
Least invasive, removable (not permanent) Metabolic benefits are dependent on amount of weight loss Ideal for those with low BMI and no metabolic conditions Lowest rate of complications Common Deficiencies: Vitamin B1, D
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Nonsurgical procedures for weight loss
Intragastric balloons, electrical vagal blocking system, endoscopic sleeve gastroplasty (ESG; doesn't affect ghrelin secretion)
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Bariatric surgery postop diet pearls
3-5 small meals per day Decrease in # of meals as portion size increases Chew thoroughly Avoid consuming liquids during meals Protein at least 60 g/d (1.2-1.5 g/kg/d of lean mass) Avoid excessive calorie intake High quality multivitamins - chewable or liquid
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What is dumping syndrome?
Complication of RNY because it bypasses the pyloric emptying mechanism; common Facial flushing, lightheadedness, fatigue, reactive hypoglycemia, postprandial diarrhea Tx: avoid high glycemic index foods, avoid drinking fluid with meals
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Can adolescents use pharmacologic therapy for weight loss?
Yes AAP Recommendations: SHOULD offer adolescents 12 years and older obesity weight loss pharmacotherapy, according to medication indications, risks, and benefits, as an adjunct to health behavior and lifestyle management Some options: liraglutide, semaglutide, topiramae, vyvanse