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mardi 3 mai 2016

An American story of obesity

At first glance
1/ they were selected as obese
2/ they obviously are able to eat great quantities of processed food especially products (compulsive behavior is clearly described)
3/ they ate real food only during the weight loss time 
So processed food + quantity + addiction = obesity
I am not surprised of their fate after weight loss
The question is 
Does processed food slow the metabolism?
My answer is yes!


http://www.livestrong.com/article/506654-late-night-eating-and-healthy-digestion/

My Comment in the NYT

This study is very interesting but perhaps not in the way it is interpreted. 

1/ it is a small group of voluntary very obese patients without any control group. It means that the selection process led to test a special subgroup of patients who are different from the millions of overweight american people. A control group should have add comparison and better understanding. On the other hand they might be cases of obesity where several mechanisms are put together and pushed to the limits which improved the experiment. 

2/ Obviously those patients ate a lot even in a compulsory mode (quantities matter) , they ate a lot of ultra-processed addictive foods (type of food matters).

3/Real food was in their plate only during the weight loss time (check the menus reported in the article and the stories about processed foods like chips...)

4/So ultra-processed food + quantity + addiction = obesity

I am not surprised of their fate after weight loss.

The question in the study is:

Does processed food slow the metabolism? My answer is yes!

In conclusion one can easily observe that this generation of american people is struck by tremendous obesity rates. It is also the case in Europe and other industrialised countries but to a less degree. Obviously their genomics has not changed in a so short period of time. Two major changes did occur: a sedentary lifestyle and a shift in food.

There are evidences that a sedentary life style reduces resting metabolism

There are also evidences that processed food (I mean products) slower metabolism in comparison of whole fresh food not or minimally processed. In my view and according of epidemiological data it would have been clever to test a group with a whole fresh food menu at each meal.

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