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Is it Time to Re-write the Textbooks on Insulin and Obesity?
Thursday, December 6, 2012 Posted by Unknown at 7:00 PM
A recent study in Cell Metabolism by Dr. Arya Mehran and colleagues found a result that, according to a press release, "could overturn widely accepted notions about healthy eating habits" (1), and has set the Internet abuzz.
In this study, researchers generated mice that lack one copy of the pancreatic insulin gene, and compared them to mice carrying both copies (2). Then, they exposed both groups to a fattening diet, and found that mice lacking one copy of the insulin gene secreted less insulin than the comparison group (i.e., they did not develop the same degree of hyperinsulinemia). These mice were also completely resistant to fat gain, while the comparison group became obese. The authors came to some rather grandiose conclusions based on these results, suggesting that the "accepted model" that hyperinsulinemia is the result of obesity is "incompatible with our results that put the insulin hypersecretion genetically upstream of obesity". Ergo, diet causes hyperinsulinemia, which causes fat gain. It's a familiar argument to those who frequent Internet diet-health circles, except in this case the hyperinsulinemia is caused by a high-fat diet.
The problem is that the "accepted model" they want to replace overnight didn't come out of thin air-- it emerged from a large body of research, which was almost completely ignored by the authors. When carefully considered, this evidence suggests an alternative explanation for the results of Dr. Mehran and colleagues.
Read more »
In this study, researchers generated mice that lack one copy of the pancreatic insulin gene, and compared them to mice carrying both copies (2). Then, they exposed both groups to a fattening diet, and found that mice lacking one copy of the insulin gene secreted less insulin than the comparison group (i.e., they did not develop the same degree of hyperinsulinemia). These mice were also completely resistant to fat gain, while the comparison group became obese. The authors came to some rather grandiose conclusions based on these results, suggesting that the "accepted model" that hyperinsulinemia is the result of obesity is "incompatible with our results that put the insulin hypersecretion genetically upstream of obesity". Ergo, diet causes hyperinsulinemia, which causes fat gain. It's a familiar argument to those who frequent Internet diet-health circles, except in this case the hyperinsulinemia is caused by a high-fat diet.
The problem is that the "accepted model" they want to replace overnight didn't come out of thin air-- it emerged from a large body of research, which was almost completely ignored by the authors. When carefully considered, this evidence suggests an alternative explanation for the results of Dr. Mehran and colleagues.
Read more »
The Affordable Care Act: Ten Months to Launch "Obamacare"––Get Ready for Some Startling Rate Increases
Tuesday, December 4, 2012 Posted by Unknown at 2:33 PM
What will health insurance cost in 2014?
Will the new health insurance exchanges be ready on time or will the law have to be delayed?
There Will Be Sticker Shock!
First, get ready for some startling rate increases in the individual and small group health insurance marketplace due to the changes the law dictates.
In a November 2009 report, the CBO estimated that premiums in the individual
Will the new health insurance exchanges be ready on time or will the law have to be delayed?
There Will Be Sticker Shock!
First, get ready for some startling rate increases in the individual and small group health insurance marketplace due to the changes the law dictates.
In a November 2009 report, the CBO estimated that premiums in the individual
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