Dr. Greger has no understanding of how the underlying physiology works, he just cites fragments of studies that he can twist to promote his agenda. He's pro-vegan/vegetarian and pushes those ideas, truth doesn't matter.
Here's an example post on why he has no idea how cholesterol works and how he's willfully ignorant and misleading people.
Disregard anything he says, he's no better than naturalnews or any other quack/woo site.
- Meat has an insulin response (00:00 to 02:00)
Meat causes an increase in insulin, but he doesn't mention that you typically only eat ~100 grams of protein on low carb diets while the average American eats 100 grams of protein and 300 grams of carbs (Austin, 2011).
So the overall insulin secretion will be lower.
- Vegetarians have lower insulin levels (02:00 to 02:30)
He forgot to mention that this is compared to people on the standard American diet.
Ketogenic diets drop insulin levels by about 33% in normal healthy men:
There were significant decreases in fasting serum TAG (-33%), postprandial lipemia after a fat-rich meal (-29%), and fasting serum insulin concentrations (-34%) after men consumed the ketogenic diet.
Sharman MJ, et al. "A ketogenic diet favorably affects serum biomarkers for cardiovascular disease in normal-weight men" J Nutr. 2002 Jul;132(7):1879-85.
- Adding eggwhite increase insulin by 60% (02:30 to 02:50
The fasting insulin levels didn't increase, fasting insulin was what he looked at in the other studies.
Fasting plasma levels of testosterone, cortisol, insulin-like growth factor-I (IGF-I), and insulin, as well as urinary output of total (hot acid-cleaved) testosterone conjugates and 3alpha-androstanediol glucuronide, did not show significant changes in response to dietary manipulations.
Remer T, et al. "A moderate increase in daily protein intake causing an enhanced endogenous insulin secretion does not alter circulating levels or urinary excretion of dehydroepiandrosterone sulfate" Metabolism. 1996 Dec;45(12):1483-6.
You just added 32 grams of protein, of course overall insulin levels rose to handle this increase. You'd see this from plant protein sources too, and If you ate carbs (which is from plants) you'd also see a rise in insulin.
But fasting insulin levels didn't change.
This is a perfect example of how Dr. Greger willfully misleading people.
- Atkins died from a heart attack from being overweight (3:20 to 3:30)
And of course he bring up the "Atkins died of a heart attack" which is completely wrong:
On April 8, 2003, at age 72, a day after a major snowstorm in New York, Atkins slipped on an icy pavement, suffering severe head trauma. He spent nine days in intensive care before dying on April 17, 2003, from complications from his head injury.
Wikipedia, "Robert Atkins, Death".
He knows that this is wrong, yet he adds it anyway. Because he's not interested in truth, he's just pushing his agenda no matter what.
- Low carb diets doesn't lower insulin levels (3:30 to 3:40)
This study was compared to low fat diets, on average you saw a drop or around -20 pmol/L if you look at the supplementary data:
Bueno NB, et al. "Very-low-carbohydrate ketogenic diet v. low-fat diet for long-term weight loss: a meta-analysis of randomised controlled trials." Br J Nutr. 2013 Oct;110(7):1178-87. doi: 10.1017/S0007114513000548. Epub 2013 May 7.
So either he doesn't know what the studies he references actually says or he's willfully misleading people (I'm guessing it's a bit of both).
- Low carb increases LDL cholesterol (3:40 to 3:50)
The difference was 4 mg/dl compared to low fat, the LDL levels actually dropped by 1 mg/dl. LDL cholesterol differences this small are also fairly meaningless as what you care about is LDL particle count and studies show those to decrease more on low carb (Krauss, 2006).
See my comment above on "why Dr. Greger has no idea how cholesterol works" for some more details.
- Paleo worsens LDL cholesterol (3:50 to end)
Again he has no idea how LDL cholesterol works or what's actually bad, LDL cholesterol increasing just likely meant that each particle carried more cholesterol as they ate more saturated fat and eggs. The amount of cholesterol being carried is largely irrelevant, what matters is the LDL particle count (and other markers like inflammation, etc.).
Without a way to measure LDL particle count the figure on it's own is meaningless, especially when it's at normal levels.
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