NSD 225 Lecture Notes - Lecture 11: Myplate, Orlistat, Hair Loss
24 Oct 2017
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Document Summary
Genetics affect body weight: risk of becoming obese if parents are obese, genetic differences in level or function of hormones, such as high ghrelin or low leptin levels, increase obesity. Genetic differences in neat: non-exercise-associated-thermogenesis: energy expenditure in non- exercise movement such as fidgeting, standing, chewing gum. Genetic and environmental factors together affect weight: environmental factors can increase appetite and decrease physical activity, environment of cheap and easily obtainable energy-dense foods stimulates appetite, gene-environment interaction: increases risk for obesity in some people. Genes vs environment: genes: 75% responsible for body weight, environment: 25% responsible, environmental factors, we work more and cook less, portion sizes are much larger, we sit more and move less, less in-home food preparation. Why diets don"t work: changes: obesity is a chronic disease, treatment requires long-term lifestyle, dieters are misdirected, more concerned about weight loss than healthy lifestyle, unrealistic expectations.
