Difference between revisions of "FEB 28"

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(Created page with "==12. FEB 28== ===Assigned Work=== :*Kessler, The End of Overeating, Chs 1-3 (p. 3-17) (14) :*Gordon Shepherd, ''Neurogastronomy'' Chapters 11, 18, and 19 (24) ===In-Class...")
 
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===Assigned Work===
 
===Assigned Work===
  
:*Kessler, The End of Overeating, Chs 1-(p. 3-17) (14)
+
:*Van Tulleken, Chris, Ultra-Processed People, C1 "Why is there bacterial slime in my ice cream? The invention of UPF" (15-30; 15)
:*Gordon Shepherd, ''Neurogastronomy'' Chapters 11, 18, and 19 (24)
+
:*Van Tulleken, Chris, C11, "UPF is pre-chewed" (171-180; 9)
 +
:*Van Tulleken, Chris, C15, "Dysregulatory bodies" (225-236; 11)
  
 
===In-Class===
 
===In-Class===
  
:*More on Bread in the Food budget.
+
:*Assign SW2, "Assessing Industrial Foods"
:*Small Group Discussion of SW2: Assessing Industrial Food Systems
 
  
===Kessler, The End of Overeating, Chs 1-7  pp. 3-45===
+
===Van Tulleken, Chris, Ultra-Processed People, C1 "Why is there bacterial slime in my ice cream? The invention of UPF" (15-30; 15)===
  
:*Some comments about approaching "unhealthy eating patterns" (expand list), some [https://www.niddk.nih.gov/health-information/health-statistics/overweight-obesity baseline data], and Kessler's basic theory.   
+
:*Food Social justice issue (connects with our discussion last class) p. 17-18Do the cheap calories of UPF support the idea that they have a role to play in human nutrition? Or does it support the idea that UPF is a source of food injustice?
  
C1
+
:*why does UPF ice cream not melt: Ice cream as a paradigm for UPF. 
  
:*obesity trend of the 1980s.  by late 80s 1/3 of pop bt. 20 and 74 overweight.  (2017: 42.4% obese (note: not just overweight).  J
+
:*Emulsifiers
  
:*Historic comparisons:  1960-2000, average weight of women in their 20s goes from 128 to 157.  Also other deciles.  Data also revealed that some people were gaining a lot more than the average.  In other words, the distribution was changing.  Overweight people became disproportionately overweightMore outliers.
+
:*Starches - some potato gastronomy (21), modified starches can replace fats and dairy, hold water during freezing and bulk out any sauce(Do you think you are fooling your brain?)
  
C2
+
:*Gums - bacterial exudates; used with starches for thickening, like sugar substitutes, may promote overweight. 
  
:*obesity is the result of eating too much foodConfusing to separate metabolism, etcPeople underreport consumption. Studies to support claimsP.8 [Note some criticisms here: microbiome effects. Others argue that metabolic changes do occur to make significant weight reduction difficult.]
+
:*Fats - aromatic molecules (of retronasal fame) all fat solubleFat is vehicle for flavor, also adds structure to foodsButter an “inverted emulsion”.
 +
::*Butter history! Napoleon era contest for subsitute: oleomargarine (still from animal fats)HydrogenationCottonseed. Crisco is born - first mass produced fake lard.
  
:*Homeostasis:  tendency of body systems to maintain bodily states within a particular range of variation.  Communication occurs throughout the body to this end.  But homeostasis can’t explain weight gain. Homeostasic system can be overwhelmed by the “reward system”.  Anticipations of reward motivate exertion. 
+
===Van Tulleken, Chris, C11, "UPF is pre-chewed"===
  
:*Some animal studies show direct stimulation of reward seeking behavior.  Stimulate the far-lateral hypothalamus” and animals overeat.  Even to cross electrified floor. [Note basic explanation here.]
+
:*How does UPF affect the structure of food (palatability) and what are the behavioral implications of UPF?  
  
:*Can some kinds of food stimulate us to keep eating?
+
:*Example of structure mattering - Apple study.  Juice is pretty close to sugar soda. 
  
C3
+
:*Coco Puffs, McD hamburgers, UPF bread.  Speed of eating higher, no time to signal satiety to brain.
  
:*Palatability - def.  a food with an agreeable taste, but in food science - a food that motivates more consumption.   
+
:*Social justice issue - food deserts often have no UPF bread, real bread expensive.   
  
:*Palatable foods engage sugar, salt, and fat, but also sensory cues.  Research (13) on combined effects of sugar and fat (Drewnowski).  Underlies many palatable features of food.  Combinations of fat and sugar chosen over other mixes.  Can make food hyperpalatable.  [https://www.sciencedaily.com/releases/2019/11/191105104436.htm Example] of "hyper-palatability" in industry and as a research concept in food science.
+
:*UPF may be changing our jaws.
  
:*15: Research (rat study) showing that consumption of SFS optimized foods increases further consumption.  Both obesity prone and obesity resistant rats over ate high SF foods.   
+
:*UPF consumed at higher rates.  (Barbara Rolls is important.  We’ll read her theory of “volumetrics”.). Some evidence of genetic disposition toward fast eating also.   
  
:*Sclafani research.  Neat fruit-loop lab detail.  Just chillin' with his rats.: feeding rats a supermarket sample of palatable food makes them obese.
+
:*Unprocessed to processed to UPF (Nova scale) - calories per minute: 36, 54, 69.
  
:*Some palatability research not in the reading:
+
===Van Tulleken, Chris, C15, "Dysregulatory bodies" ===
::*[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5332909/ Can the Palatability of Healthy, Satiety-Promoting Foods Increase with Repeated Exposure during Weight Loss?]
 
::*
 
  
C4
+
:*Different approaches to drugs v foods. 
  
:*examples of foods that layer S F and S(Gordy's lemon chicken, much like p. 20 "Chicken Pot Stickers")
+
:*Corn oil isn’t just made from squeezing corn.  Read at 226.  Could be “corn oil” on the label and have lots of additives from processing.   
  
:* reports from food execs confirming that industrial food design focuses on highly stimulating and palatable foodsCommon popular restaurant foods described in terms of stacking fat on fat on sugar on salt on fat, ... etc.  fat with a little lettuce!
+
:*Three approaches a food company can take with FDA.  Full review, register additive as a GRAS (generally recognized as safe), “self-determination” that additive is a GRASBacklog of GRAS applications led to interpretation allowing self-determination.
  
C5
+
:*Experts cited in the chapter reviewed additive applications. Critical of Corn Oil ONE’s application.  Wrong molecule! 
  
:*critical of “set point theory” more interested in version he calls “settling point” theoryA kind of equilibrium between appetite (which both a drive to eat and capacity to be satisfied and expenditure - physical work and body that burns calories effectively. Constant access to highly palatable foods drives up '''settling point'''.   (Kind of acknowledges that there is wide variation in the hold (capture) of high SFS foods.
+
:*Concern about hormonal changes from additive connected to low fertility rates[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6079277/]
  
:*p. 25: Discussion with other people who find weight control challengingnote descriptions.  Important qualification: Food cravings are not unique to overweight peopleSignificance of this section, I think: Most of you probably don't have similar reactions. His point.
+
:*No complete list of approved additivesMaybe 10,0000, of which 1,000 self-determined(Elsewhere in the book we learn the EU list is about 2,000.).  
  
C6
+
:*Example of trans fats.  If they had been self-approved, we wouldn’t know about them. 
  
:*rewarding foods are reinforcing. Reinforcing measured by willingness to work for substance and whether other stimuli can become associated with it(Mention Neurogastronomy coming later to show how this works.)
+
:*Flavor ingredient regulation 232ff. Self-determined approval of 2,600 ingredientsExample of isoeugenol.
  
:*food can be an effective reward even in the absence of hungerAnimal studies to show this. 
+
:*Effects of additives fall disporportionately on the poor and low SES.   
  
:* “conditioned place paradigm”. — tendency to prefer the location in which a reward was experience.
+
:*EU regulation is better, but also problems. Ethical issues of the regulatory process: $2 billion and 100 million experiemental animals.
  
:*Other influences:  portion, concentration of rewarding ingredients, variety. 
+
===SW2: Assessing Industrial Foods===
  
C7
+
:*'''Stage 1''': Please write an 800 hundred word maximum answer to the following question by '''Monday, March 4, 2024, 11:59pm.'''
 +
::*Topic: We have been assessing industrial food primarily from the writings of Moss, Schatzker, and van Tulleken.  In the first 500-600 words of your essay, draw upon these authors to answer these two questions: What are the primary concerns about processed and ultra-processed foods?  What evidence supports these concerns?  Then, in remainder of your essay, consider the social justice dimensions of industrial foods.  Do they solve a problem of food insecurity or do you see them as an unjust way of limiting the health and life prospects of relatively poor eaters who can only afford industrial food?
  
:*Neural account of high SFS / palatable foodsNeuron encodes when it fires more often from a stimuliComplex patterns can be encoded from food experience.   
+
:*'''Advice about collaboration''': Collaboration is part of the academic process and the intellectual world that college courses are based on, so it is important to me that you have the possibility to collaborate.  I encourage you to collaborate with other students, but only up to the point of sharing ideas, references to class notes, and your own notes, '''verbally'''.  Collaboration  is also a great way to make sure that a high average level of learning and development occurs in the classThe best way to avoid plagiarism is to NOT share text of draft answers or outlines of your answer.  Keep it verbalGenerate your own examples.   
  
:* Taste is predominant.  “Orosensory self-stimulation”.  Opioid circuitry stimulated by food. P. 37: mechanisms of the reward system.  Imp of nucleus accumbens. 
+
:*Prepare your answer and submit it in the following way. '''You will lose points''' if you do not follow these instructions:
  
:*Claims there is a mutually reinforcing effect between highly palatable foods and opioid circuits.   
+
::# To assure anonymity, you must remove your name from the the "author name" that you may have provided when you set up your word processing application. For instructions on removing your name from an Word or Google document, [[https://wiki.gonzaga.edu/alfino/index.php/Removing_your_name_from_a_Word_file click here]].
 +
::# Format your answer in double spaced text, in a typical 12 point font, and using normal margins. Do not add spaces between paragraphs and indent the first line of each paragraph. 
 +
::# '''Do not put your name in the file or filename'''You may put your student ID number in the file, but '''not in the filename'''. Save your file for this assignment with the name: "IndustrialFoods".
 +
::# To turn in your assignment, log into courses.alfino.org, click on the "#0 - SW2 - Assessing Industrial Foods" dropbox.
 +
::# If you cannot meet a deadline, you must email me about your circumstances (unless you are having an emergency) '''before''' the deadline or you will lose points. 
  
:* Some evidence (Wooley p. 38) that highly palatable foods interfere with or override taste specific satiety (a mechanism that should reduce the reward experience of food at margins), which predicts that we will get tired of a single taste more quickly than if other tastes are present. Stimulation of the opioid circuits in animals overrode boredom with single taste.
+
:*'''To accomodate the timing of Spring Break, we will skip peer review for this assignment.'''
 +
 
 +
:*'''Stage 2''': I will grade and briefly comment on your writing.

Latest revision as of 21:54, 28 February 2024

12. FEB 28

Assigned Work

  • Van Tulleken, Chris, Ultra-Processed People, C1 "Why is there bacterial slime in my ice cream? The invention of UPF" (15-30; 15)
  • Van Tulleken, Chris, C11, "UPF is pre-chewed" (171-180; 9)
  • Van Tulleken, Chris, C15, "Dysregulatory bodies" (225-236; 11)

In-Class

  • Assign SW2, "Assessing Industrial Foods"

Van Tulleken, Chris, Ultra-Processed People, C1 "Why is there bacterial slime in my ice cream? The invention of UPF" (15-30; 15)

  • Food Social justice issue (connects with our discussion last class) p. 17-18. Do the cheap calories of UPF support the idea that they have a role to play in human nutrition? Or does it support the idea that UPF is a source of food injustice?
  • why does UPF ice cream not melt: Ice cream as a paradigm for UPF.
  • Emulsifiers
  • Starches - some potato gastronomy (21), modified starches can replace fats and dairy, hold water during freezing and bulk out any sauce. (Do you think you are fooling your brain?)
  • Gums - bacterial exudates; used with starches for thickening, like sugar substitutes, may promote overweight.
  • Fats - aromatic molecules (of retronasal fame) all fat soluble. Fat is vehicle for flavor, also adds structure to foods. Butter an “inverted emulsion”.
  • Butter history! Napoleon era contest for subsitute: oleomargarine (still from animal fats). Hydrogenation. Cottonseed. Crisco is born - first mass produced fake lard.

Van Tulleken, Chris, C11, "UPF is pre-chewed"

  • How does UPF affect the structure of food (palatability) and what are the behavioral implications of UPF?
  • Example of structure mattering - Apple study. Juice is pretty close to sugar soda.
  • Coco Puffs, McD hamburgers, UPF bread. Speed of eating higher, no time to signal satiety to brain.
  • Social justice issue - food deserts often have no UPF bread, real bread expensive.
  • UPF may be changing our jaws.
  • UPF consumed at higher rates. (Barbara Rolls is important. We’ll read her theory of “volumetrics”.). Some evidence of genetic disposition toward fast eating also.
  • Unprocessed to processed to UPF (Nova scale) - calories per minute: 36, 54, 69.

Van Tulleken, Chris, C15, "Dysregulatory bodies"

  • Different approaches to drugs v foods.
  • Corn oil isn’t just made from squeezing corn. Read at 226. Could be “corn oil” on the label and have lots of additives from processing.
  • Three approaches a food company can take with FDA. Full review, register additive as a GRAS (generally recognized as safe), “self-determination” that additive is a GRAS. Backlog of GRAS applications led to interpretation allowing self-determination.
  • Experts cited in the chapter reviewed additive applications. Critical of Corn Oil ONE’s application. Wrong molecule!
  • Concern about hormonal changes from additive connected to low fertility rates. [1]
  • No complete list of approved additives. Maybe 10,0000, of which 1,000 self-determined. (Elsewhere in the book we learn the EU list is about 2,000.).
  • Example of trans fats. If they had been self-approved, we wouldn’t know about them.
  • Flavor ingredient regulation 232ff. Self-determined approval of 2,600 ingredients. Example of isoeugenol.
  • Effects of additives fall disporportionately on the poor and low SES.
  • EU regulation is better, but also problems. Ethical issues of the regulatory process: $2 billion and 100 million experiemental animals.

SW2: Assessing Industrial Foods

  • Stage 1: Please write an 800 hundred word maximum answer to the following question by Monday, March 4, 2024, 11:59pm.
  • Topic: We have been assessing industrial food primarily from the writings of Moss, Schatzker, and van Tulleken. In the first 500-600 words of your essay, draw upon these authors to answer these two questions: What are the primary concerns about processed and ultra-processed foods? What evidence supports these concerns? Then, in remainder of your essay, consider the social justice dimensions of industrial foods. Do they solve a problem of food insecurity or do you see them as an unjust way of limiting the health and life prospects of relatively poor eaters who can only afford industrial food?
  • Advice about collaboration: Collaboration is part of the academic process and the intellectual world that college courses are based on, so it is important to me that you have the possibility to collaborate. I encourage you to collaborate with other students, but only up to the point of sharing ideas, references to class notes, and your own notes, verbally. Collaboration is also a great way to make sure that a high average level of learning and development occurs in the class. The best way to avoid plagiarism is to NOT share text of draft answers or outlines of your answer. Keep it verbal. Generate your own examples.
  • Prepare your answer and submit it in the following way. You will lose points if you do not follow these instructions:
  1. To assure anonymity, you must remove your name from the the "author name" that you may have provided when you set up your word processing application. For instructions on removing your name from an Word or Google document, [click here].
  2. Format your answer in double spaced text, in a typical 12 point font, and using normal margins. Do not add spaces between paragraphs and indent the first line of each paragraph.
  3. Do not put your name in the file or filename. You may put your student ID number in the file, but not in the filename. Save your file for this assignment with the name: "IndustrialFoods".
  4. To turn in your assignment, log into courses.alfino.org, click on the "#0 - SW2 - Assessing Industrial Foods" dropbox.
  5. If you cannot meet a deadline, you must email me about your circumstances (unless you are having an emergency) before the deadline or you will lose points.
  • To accomodate the timing of Spring Break, we will skip peer review for this assignment.
  • Stage 2: I will grade and briefly comment on your writing.