Protein intake and bone mineral content

[Guest guest]

I get abstracts of medical journals on the topics of obesity, nutrition

and osteoporosis. If the topic is interesting, I then follow the

abstract to a summary of the article. Below is the summary of an

article dealing with the effect of protein intake on bone mineral

content. As I read it, high protein intake in a low calorie diet does

not result in diminished bone mineral content, but low protein intake

does. This appears to be one more reason why to maintain a high protein

diet.

There was an interest expressed in the actual results of my recent lab

tests. I do have the results, except for iron and vitamin b-12. I will

have to go back and have those tests redone. If it really of interest,

I have no problem in publishing the lab results to the group. I would

note that the Protein, Total result was 7.1 in a Reference Range of

6.0-8.3. This protein level was achieved without having taken any

protein supplement in over a year.

Here is the article summary:

Effect of protein intake on bone mineralization during weight loss: a

6-month trial.

Skov AR, Haulrik N, Toubro S, Molgaard C, Astrup A.

Research Department of Human Nutrition & Center of Food Research, The

Royal Veterinary and Agricultural University, Frederiksberg C,

Copenhagen, Denmark.

OBJECTIVE: The long-term effect of dietary protein on bone

mineralization is not well understood. RESEARCH METHODS AND PROCEDURES:

Sixty-five overweight (body mass index, 25 to 29.9 kg/m(2)) or obese (>

or =30 kg/m(2)) subjects were enrolled in a randomized,

placebo-controlled, 6-month dietary-intervention study comparing two

controlled ad libitum diets with matched fat contents: high protein (HP)

or low protein (LP). Body composition was assessed by DXA. RESULTS: In

the HP group, dietary-protein intake increased from 91.4 g/d to a

6-month intervention mean of 107.8 g/d (p < 0.05) and decreased in the

LP group from 91.1 g/d to 70.4 g/d (p < 0.05). Total weight loss after 6

months was 8.9 kg in the HP group, 5.1 kg in the LP group, and none in

the control group. After 6 months, bone mineral content (BMC) had

declined by 111 +/- 13 g (4%) in the HP group and by 85 +/- 13 g (3%) in

the LP group (not significant). Loss of BMC was more positively

correlated with loss of body fat mass (r = 0.83; p < 0.0001) than with

loss of body weight. Six-month BMC loss, adjusted for differences in fat

loss, was greater in the LP group than in the HP group [difference in LP

vs. HP, 44.8 g (95% confidence interval, 16 to 73.8 g); p < 0.05].

Independent of change in body weight and composition during the

intervention, high protein intake was associated with a diminished loss

of BMC (p < 0.01). DISCUSSION: Body-fat loss was the major determinant

of loss of BMC, and we found no adverse effects of 6 months of

high-protein intake on BMC.

Ray Hooks

http://www.bariatricsupplementsystem.com

[Guest guest]

In a message dated 12/4/2002 10:54:04 AM Pacific Standard Time,

rhooks@... writes:

> I would

> note that the Protein, Total result was 7.1 in a Reference Range of

> 6.0-8.3. This protein level was achieved without having taken any

> protein supplement in over a year.

>

Ray,

That's great, but what was your total protein PREop? That's the key to

telling whether or not you are absorbing protein from food or if you need to

start supplementing. You may still be in the normal range, however, if you

compare the present lab to that preop you may be seeing a steady decline.

Thus, you know as well as the rest of us, that protein supplements should be

taken.

B

Distal RNY 12/27/95

275/155

[Guest guest]

I don't know what it was pre op. I know it was 4.5 at 6 months post op.

Ray Hooks

For WLS nutrition info, visit

http://www.bariatricsupplementsystem.com

71160@... wrote:

>

> In a message dated 12/4/2002 10:54:04 AM Pacific Standard Time,

> rhooks@... writes:

>

> > I would

> > note that the Protein, Total result was 7.1 in a Reference Range of

> > 6.0-8.3. This protein level was achieved without having taken any

> > protein supplement in over a year.

> >

>

> Ray,

> That's great, but what was your total protein PREop? That's the key to

> telling whether or not you are absorbing protein from food or if you need to

> start supplementing. You may still be in the normal range, however, if you

> compare the present lab to that preop you may be seeing a steady decline.

> Thus, you know as well as the rest of us, that protein supplements should be

> taken.

>

> B

> Distal RNY 12/27/95

> 275/155

>

>