Protein source and food intake

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Hi All,

Will Brink's message was said to be:

" It should also be noted that although studies find protein to be the

most satiating of the macro-nutrients, certain protein sources (e.g.

egg whites) may actually increase appetite ( GH, Tecimer SN,

Shah D, Zafar TA. Protein source, quantity, and time of consumption

determine the effect of proteins on short-term food intake in young

men. J Nutr. 2004 Nov;134(11):3011-5.), so protein sources appear

worth considering when looking to maximize weight loss and suppress

appetite. "

The Medline abstract and available pdf excerpts are below for the paper. Egg

whites

supplied egg protein. Even table sugar was better than egg white protein?

J Nutr. 2004 Nov;134(11):3011-5.

Protein source, quantity, and time of consumption determine the effect of

proteins

on short-term food intake in young men.

GH, Tecimer SN, Shah D, Zafar TA.

The objective of these 4 studies was to describe the effects of protein

source,

time of consumption, quantity, and composition of protein preloads on food

intake in

young men. Young men were fed isolates of whey, soy protein, or egg albumen in

sweet

and flavored beverages (400 mL) and provided a pizza meal 1-2 h later. Compared

with

the water control, preloads (45-50 g) of whey and soy protein, but not egg

albumen,

suppressed food intake at a pizza meal consumed 1 h later. Meal energy intake

after

egg albumen and soy, but not after control or whey treatments, was greater when

the

treatments were given in the late morning (1100 h) compared with earlier

(0830-0910

h). Suppression of food intake after whey protein, consumed as either the intact

protein or as peptides, extended to 2 h. Altering the composition of the soy

preload

(50 g) by reducing the soy protein content to 25 g and by adding 25 g of either

glucose or amylose led to a loss in suppression of food intake by the preload.

Egg

albumen, in contrast to whey and soy preloads, increased cumulative energy

intake

(sum of the energy content of the preload plus that in the test meal) relative

to

the control. We conclude that protein source, time of consumption, quantity, and

composition are all factors determining the effect of protein preloads on

short-term

food intake in young men.

PMID: 15514267

TABLE 1 Effect of protein source in preload treatments on food intake 1 h later

in

adult men1

....................................................

Preload treatments

Control Egg Whey Soy Sucrose

......................................................

Experiment 1

Meal,2 kJ 3557±284a 3816±280a 2766±238c 3054±301bc 3447±255ab

Meal+ Preload,3 kJ 3624±272c 4649±272a 3599±234c 3887±293bc 4280±242ab

Compensation,4 % — –33±30c 96±24a 59±35ab 12±25c

Experiment 2

Meal,2 kJ 4347±305a 4131±305a 3210±259b

Meal+ Preload,3 kJ 4414±305b 4967±327a 4045±259b

Compensation,4 % — 27±30b 126±31a

..............................................................

1 Values are means±SEM, n = 13 (Expt. 1) and n = 22 (Expt. 2). Means in a row

without a common letter differ, P < 0.05.

2 Pizza intake at test meal.

3 Cumulative energy intakes from pizza meal and the preload treatment.

4 Compensation (%) = (control meal (kJ) – treatment meal (kJ)/preload (kJ) x 100

TABLE 2 Effect of protein source in preload treatments on food intake by time of

treatment in adult men1

...............................................................

----Preload treatments (kJ)

n----Control Egg Whey Soy Sucrose

...................................................................

Experiment 1

Meal2

0910 h 6 3659±263a 3210±309ab 2521±155c 2551±380c 3128±326b

1100 h 7 3469±493bc 4335±531a* 2977±422c 3487±405bc* 3719±368ab

Meal+ Preload3

0910 h 6 3725±284ab 4047±293a 3385±142b 3415±368b 3992±305a

1100 h 7 3536±493d 5141±351a* 3783±439cd 4293±401bc* 4525±364ab

Experiment 2

Meal2

0830 h 12 4249±251a 3591±322b 2968±318c

1100 h 10 4406±619ab 4779±556a* 3499±426b

Meal+ Preload3

0830 h 12 4364±251ab 4427±322a 3804±318b

1100 h 10 4473±614b 5614±556a* 4335±426b

............................................................................

1 Values are means±SEM. Means in a row without a common letter differ, P < 0.05.

* Different from 0910 or 0830 h (Student’s unpaired t test, P < 0.05).

2 Pizza intake at test meal.

3 Cumulative intakes from pizza meal and the preload treatment.

TABLE 3 Experiment 4: Effect of carbohydrate addition to soy protein preloads on

food intake 1 h later in adult men1

.........................................................

Treatment----Meal2 Meal±Preload3----Compensation4

----kJ----%

.........................................................

Control 3988±293a 3988±293b —

Soy 3118±334b 3954±334b 104±26

Soy/glucose 3532±251ab 4368±251a 56±29

Soy/amylose 3615±280a 4448±364a 46±24

..........................................................

1 Values are means±SEM, n = 13. Means in a column without a common letter

differ, P

< 0.05.

2 Pizza intake at test meal.

3 Cumulative intake from pizza meal and the preload treatment.

4 Compensation (%) = (control meal (kJ) – treatment meal (kJ)/preload (kJ) x

100.

TABLE 4 Experiment 4: Effect of soy preloads with glycemic carbohydrate on blood

glucose concentration in adult men1

............................................................

Time----Control Soy Soy/Glucose Soy/Amylose F P

min----mmol/L

............................................................

0 5.1±0.2 4.8±0.1 4.9±0.2 4.9±0.1 0.91 0.44

15 4.9±0.2c 5.1±0.1bc 6.3±0.2a 5.5±0.2b 14.94 <0.001

30 4.9±0.1c 5.2±0.2c 6.4±0.2a 5.7±0.2b 15.52 <0.001

45 4.8±0.1b 5.2±0.2ab 5.5±0.2a 5.5±0.2a 5.64 0.001

60 4.8±0.1 5.2±0.2 5.1±0.3 5.3±0.2 1.85 0.16

............................................................

1 Values are means±SEM, n = 13. Means in a row with superscripts without a

common

letter differ, P < 0.05.

Al Pater, PhD; email: old542000@...

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