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In the News: Dietary protein intake and weight gain
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04/01/12 05:19 PM | Edit ReplyReply   |    Dietary protein intake and weight gain
cherries
84 Posts

Student

Hello all,

I was wondering what everyone's opinion is regarding this article:

http://jama.ama-assn.org/content/307/1/47.abstract

More regarding the study found here:

http://jama.ama-assn.org/content/307/1/86.extract

http://newsatjama.jama.com/2012/01/03/fat-accumulation-dictated-by-excess-calories-not-protein-content/

http://www.nytimes.com/2012/02/07/health/research/low-protein-diets-may-be-costly-to-lean-body-mass.html?_r=1

http://healthland.time.com/2012/01/04/low-protein-diets-lower-weight-but-dont-cut-fat/

http://yourlife.usatoday.com/fitness-food/diet-nutrition/story/2012-01-03/Extra-calories-low-protein-are-culprits-in-weight-gain/52365608/1

There are several other media reports but these are most representative. I really don't like the media reports that are reporting it doesn't matter where excess calories come from whether they are protein or fat...the participants still gain the same amount of fat.

This is misleading because the moderate and high protein groups had greater total fat free mass compared to the low protein group. Some reports (and unfortunately some of my colleagues) are putting emphasis on the fact that they gained the same amount of fat and therefore it doesn't matter where your calories come from when you are overeating.

But technically, it DOES matter where your calories come from because the moderate and high protein groups had greater fat free mass where the low protein group actually lost fat free mass, therefore body composition got worse with the low protein group. In this study excess calories not only affect fat stores but also fat free mass. Who cares if there was no difference in fat mass, there was a difference in fat free mass!

I guess I'm just frustrated because some are looking at this study in terms of fat mass as the only important endpoint and I'm trying to get my point across that calories do matter during weight gain in the sense that fat free mass is also affected and differently with varying protein intakes.

Or maybe I'm just looking at it all wrong? :/

04/30/12 11:09 AM | Edit ReplyReply   |    RDA for Protein
ironjustice
9 Posts
calgary
Student

Quote: "Bray also points out that based on the amount of protein consumed daily by participants eating the low-protein diet (48 g), overeaters would have to up their intake to 78 g to keep from losing lean body mass. Meanwhile, Americans are typically advised to eat a minimum of 56 g of protein a day “as the lower limit of normal,” Bray says, “suggesting that this criterion might need to be reconsidered.”

Answer: The RDA for protein is .8 gm/kg bodyweight, or 56 gm for a 154 lb male BUT , research , due to food constraints , showed a 154 lb man can live on 15 gm. So can anyone explain WHY would Dieticians and Doctors AGREE that three times more protein than REQUIRED is the healthiest? I quite haven't figured this out. "Within one year's time the death rate had decreased 40 percent" http://www.rawfoodexplained.com/proteins/the-question-of-proteins.html

The work was done by Mikkel Hindhede. http://en.wikipedia.org/wiki/Mikkel_Hindhede

Dr M. Hindhede discovered a 150-lb. man can live on half an oz. / 14 gms of protein a day which seems to jibe , now , with recent research ?

"Reducing consumption of a protein found in fish and meat could slow the ageing process and increase life expectancy, according to the research" http://www.animalliberationfront.com/Practical/Health/Diet4LongLife.htm

05/04/12 08:26 PM | Edit ReplyReply   |    Low-iron Diet
ironjustice
9 Posts
calgary
Student

A low-iron diet would be a vegetarian diet.

Diet may slow progression of diabetic nephropathy. J Fam Pract. 2003 Sep;52(9):672-3. Mounsey A. Department of Family Medicine, University of Virginia, Charlottesville, VA USA. E-mail: alm2d~virginia.edu A polyphenol-enriched diet with 50% carbohydrate restriction and low iron availability was superior to a conventional protein-restricted diet in slowing the progression of diabetic nephropathy. These findings must be confirmed by additional high-quality studies before physicians can routinely recommend a change from the conventional low-protein diet. Current use of this diet is limited, as many nutritionists-even those specializing in diabetes-have no knowledge of it. PMID: 12967532

06/10/12 04:38 PM | Edit ReplyReply   |    RE: Dietary protein intake and weight gain
jbholden
80 Posts

Registered Dietitian

I just scanned the study, but I don't think it is very applicable. The low protein diet group consumed 5% of calories from protein. Considering that most food contain greater than 5% protein makes this diet impossible, except in a controlled setting. For example, potatoes have greater than 10% of their calories from protein and rice has greater than 8%. I don't think there was a significant difference between the 15% and 25% protein diet groups. Obviously someone eating 5% of there Calories from protein is going to gain a greater percentage of fat than muscle. Unless they are consuming double their calorie requirements they are not getting a sufficient amount of essential amino acids to maintain muscle mass (they are deficient). The RDA for protein is about 11-13% of Calories (using 0.8g/kg and 25-30 kcals/kg).


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