Moderators: JeffN, carolve, Heather McDougall
Spiral wrote:Jeff,
I have read your analysis of the documentary "What the Health" and it prompted this question: What's a non-expert to do?
Let's take a hypothetical 40 year old man who has recently been diagnosed with hypertension and type 2 diabetes. He has been told by his physician and his dietician that he needs to keep tight control over his "carbs." His brother-in-law, also a physician, tells him that he should eat grass fed beef several times each week and three eggs each morning.
His vegan co-worker tells him to watch the "Forks Over Knives" documentary and to "go Vegan." But after he watches that documentary, his paleo brother-in-law emails him a link to Denise Minger's blog, which informs him that the data used in that movie was distorted to make animal based foods appear unhealthy.
Something similar happens after he watches "What the Health." He reads a review of that documentary on a web page titled, "Science Based Medicine." Harriet Hall details the distortions made in that movie.
How does this 40 year old man wade through all of the conflicting claims and attempt to make sense of the data? Let's assume that this person isn't very good at analyzing the peer reviewed journal articles available on Pub Med.
Is it just a toss of the coin for most people? People just randomly trying different diets until they finally find one that works? Or do you think even a person with average education and intelligence could determine that someone like Dr. McDougall is more credible and more worth listening to than Dr. Lustig?
JeffN wrote:I notice you often post very well thought out responses to questions, topics, issues, etc.
JeffN wrote:So, before I give you my answer, I have three questions for you....
First,
1) If someone came to you and asked you this question, how would you answer it?
JeffN wrote:2) How did anyone do this before the last 10-15 years? Are you implying this is something new? Are you familiar with the diet wars going back to the early 1800's (and even much earlier)?
JeffN wrote:3) Are you implying that we don't make any other major decisions in our life and if so, the answers are always clear cut without any confusion, misinformation, corruption, bias, etc? If not, how does anyone ever do this in regard to any other important/major decision in their life?
Spiral wrote:JeffN wrote:So, before I give you my answer, I have three questions for you....
First,
1) If someone came to you and asked you this question, how would you answer it?
I would tell this person to read the views of a variety of people on this topic, note their credentials and accomplishments, consider the plausibility of their arguments and look for logical consistency between claims and results. Then draw a tentative conclusion, while remaining open to new information.
Spiral wrote:JeffN wrote:2) How did anyone do this before the last 10-15 years? Are you implying this is something new? Are you familiar with the diet wars going back to the early 1800's (and even much earlier)?
I am not very familiar with the diet wars of the early 1800's. I had no idea that the duel between Aaron Burr and Alexander Hamilton was over the effectiveness of the Atkins diet. (That's a joke.)
But, seriously. I did not know that there were diet wars going on that far back. I thought this was something that perhaps started in the Ancel Keys era.
I acknowledge that this isn't new. As to how anyone did this in, say, the 1970s, I suspect that most people didn't do much of anything except eat what was put in front of them. I remember, as a teenager, seeing a Yoplait Yogurt commercial and thinking that eating yogurt would increase my life expectancy. I think we have always had trouble with separating good information from distortion and half-truth.?
Spiral wrote:JeffN wrote:3) Are you implying that we don't make any other major decisions in our life and if so, the answers are always clear cut without any confusion, misinformation, corruption, bias, etc? If not, how does anyone ever do this in regard to any other important/major decision in their life?
When I purchased my last car, I didn't have perfect information. And I knew that the car dealer wanted to get as much money out of me as possible. Buying a house seems like even more of a roll of the dice. So, I suppose expecting everyone to have perfect knowledge of nutrition is unrealistic. We have to muddle through the best we can. This even includes the researchers and health care professionals.
JeffN wrote:I agree with you on this. We have always had trouble with separating good information from distortion and half-truth. I think social media has made the process more difficult, for reasons I describe in other threads, but it has always existed.
JeffN wrote:We have to do our best to develop and use critical thinking skills, we have to learn how to identify and evaluate information and we have to learn how to identify and evaluate true experts.
JeffN wrote:It is not easy and social media has made it much harder.
JeffN wrote:But in regard to this way of life, so has this movement...
On one hand, many are quick to criticize those who do not agree with them because they lack professional experience or credentials. Yet, on the other hand, they quickly promote many who agree with them as experts even though many also lack professional experience or credentials.
Many are willing to quickly dismiss most any study regardless of how well it was done if it disagrees with them, yet they are just as quick to tout any study that agrees with them, regardless of its quality.
Many will quickly criticize "their" exaggerations yet use many exaggerations themselves.
Many will quickly dismiss any study they don't like due to funding yet quickly accept any study they do like, regardless of funding
Many will quickly dismiss any celebrity touting their way of life cause they are just celebrities yet quickly promote and endorse any celebrity who agrees with them.
The recent debates over the movie, What The Health, makes many of these points. While I don't agree with David Katz, MD or Ginny Messina, RD, they both made excellent points that everyone was quick to dismiss because he "eats oil and isn't vegan" and she "promotes unhealthy vegan foods." True, but at the same time we allow and accept none experts and none professionals to make exaggerated, misleading or inaccurate claims about the movie because they are WFPB No-Oil vegans or McDougaller's.
Also obligatory in any plant-based film is the graph showing that populations who consume the most dairy worldwide have the highest rates of hip fracture. This may be true. But you know how Dr. Neal Barnard rolls his eyes in this film when he’s asked about sugar and diabetes? That’s me when people start talking about the link between hip fracture rates and dairy or protein intake among countries. Among nutrition experts, these kinds of comparisons carry almost no weight. This is because there are so many confounding factors that affect the comparisons. For example, countries with high dairy consumption also tend to have icier winters. This significantly increases risk of falling, which in turn increases risk of a hip fracture. In fact, the article that What the Health cites to support the dairy connection to hip fracture doesn’t even mention dairy. It says that the factors responsible for the differences in fracture rates are “population demographics (with more elderly living in countries with higher incidence rates) and the influence of ethnicity, latitude, and environmental factors.”
JeffN wrote:Most all the evidence supporting this lifestyle come from studies on the 7th Day Adventist, some other observational studies, studies on long-lived populations, and the clinical studies of Pritikin, Shintani, Ornish, Kemper, Diehl, Esselstyn, Morrison, etc These programs were not all no-oil and/or vegan. So, if you want to dismiss what David Katz has to say because he isn't a "no oil vegan," then you have to dismiss most all the above evidence too.
Spiral wrote:JeffN wrote:I agree with you on this. We have always had trouble with separating good information from distortion and half-truth. I think social media has made the process more difficult, for reasons I describe in other threads, but it has always existed.
At the risk of disagreeing with you, I think social media is a net positive.
Spiral wrote:JeffN wrote:We have to do our best to develop and use critical thinking skills, we have to learn how to identify and evaluate information and we have to learn how to identify and evaluate true experts.
I feel fortunate to have identified people like you, Dr. McDougall, Dr. Esselstyn, Dr. Greger, Dr. Barnard, Dr. T. Colin Campbell and Dr. Garth Davis.
None of you are perfect and incapable of error. But if I am too lazy to form an opinion about something on my own, I feel pretty confident I can rely on the options of you and those I listed, at least until I have time to study up. When I see that there is disagreement within that list of people, I make a decision based on how well each has made his case.
Spiral wrote: I too think that Ginny Messina, RD, put forth some important criticisms of "What the Health." Let's be honest, "What the Health" was propaganda, not an attempt to deliver a sober, even-handed, dispassionate review of nutrition science. Perhaps "Forks Over Knives" was better. But that movie also had an agenda, to convince its viewers to try a whole foods plant based diet.
But I do not think it is possible to create a 90 minute movie that dispassionately educates its viewers on nutrition science that does not also either bore its viewers or result in most people ignoring it.
Spiral wrote: Unfortunately, human nature being what it is, a nutrition documentary has to include some fake drama and hyperbole.
Spiral wrote: Dr. Greger's Nutrition Facts videos are not perfect by any means. But they expose their viewers to more peer reviewed nutrition science than most other sources of nutrition information. Would a 90 minute documentary hosted by Dr. Greger get as much attention as "What the Health?" I'm not sure.
Spiral wrote: So, go ahead and criticize "What the Health." But some of the criticisms should also be criticized.
Spiral wrote:JeffN wrote:Most all the evidence supporting this lifestyle come from studies on the 7th Day Adventist, some other observational studies, studies on long-lived populations, and the clinical studies of Pritikin, Shintani, Ornish, Kemper, Diehl, Esselstyn, Morrison, etc These programs were not all no-oil and/or vegan. So, if you want to dismiss what David Katz has to say because he isn't a "no oil vegan," then you have to dismiss most all the above evidence too.
I am more than willing to acknowledge not only what you wrote above, but that the long-lived Okinawans weren't vegan.
Spiral wrote: I don't dismiss what Dr. Katz says. Sometimes I simply disagree with him. Like when Dr. Katz argues that eggs are a healthy food. I won't ignore him completely. However, I won't place as much value on his nutrition advice as I would with those I listed above. Am I wrong to rank people in this way?
Spiral wrote: I wonder if you would ever have the time and inclination to create your own NovickFacts.Org video series, where you would examine one of Dr. Greger's videos, one that you think distorted and/or manipulated the facts to reach an incorrect conclusion.
Spiral wrote:So many times when I watch Dr. Greger's videos I think, "I wonder what Jeff Novick would say about this." Now, I realize that Dr. Greger has the time and resources to produce those videos while you have a different job that mostly prevents you from doing this.
Spiral wrote:But I dare say that I am not alone in wishing for a NovickFacts.Org video series.
Spiral wrote: I also would be interested in having you review the First Half of Dr. Greger's book, "How Not To Die." Not the second half of the book where he recommends red cabbage over green cabbage. That would be too easy to criticize.
Spiral wrote:But reading that book made me think that there really was a ton of scientific evidence supporting a healthy plant based diet (though not necessarily vegan).
Spiral wrote:I'd would read a review written by you to learn if you think Dr. Greger was guilty of cherry picking or misinterpreting the evidence in that part of the book.
JeffN wrote:Or think of this way.
Dr Greger tells the remarkable story of his grandmother and her visit to Pritikin and the impact on her life. She went to the center around 1980 and he said they saved her life and gave her 31 more good years. Now, imagine at that time, you were like me and read the McDougall Plan (and/or the Pritikin Book), went to Pritikin (or McDougall) and went on the program (Mcdougall or Pritikin) and became familiar with all literature cited in their books.
(NOTE: We could also add in the Ornish Program. While his mass media book did not come out till about 1990, his first published papers were in 1983 and 1985 so the info was available.)
We then induce you into a Cryonic state-like coma that stopped you from aging. We then awaken you today, 35 years later and you continue the lifestyle you learned back then.
Or you just go into the woods for 35 years, continue the lifestyle and reemerge today, still living the lifestyle.
Then, you read, "How Not To Die."
What would you change in your diet? What are the things you would change based on "new" evidence? Or that you might write Dr McDougall, Dr Ornish or the Pritikin program and ask, should I be doing this? And, if you did, what do you think they would say?
Knowing &/or hearing from literally 1000's who went on The Pritikin or McDougall program back then & are around now, including myself...
Nothing. Or not much.
Or think of it this way, if today, you were like his grandmother and in a tough spot. You read How Not To Die and are convinced to give it a shot and want to go to an inpatient medically supervised program. Well, the 3 main programs you could go to today are still Pritikin, Ornish and McDougall. And how much different is the information you would get there today compared to 30 years ago?
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