Navigation Links
New meta-analysis builds on the power of whey protein for improved body composition
Date:4/15/2014

Rosemont, IL (April 15, 2014) New research published in the March/April 2014 issue of the Journal of the American College of Nutrition shows whey protein, either as a supplement combined with resistance exercise or as part of a weight-loss or weight-maintenance diet, may provide men and women benefits related to body composition.

The meta-analysis included 14 randomized controlled trials with a total of 626 adult participants. When researchers analyzed those weight loss studies that used whey protein to replace calories in the diet, participants had a decrease in body weight of 4.2 kg (9.2 pounds), on average, compared to baseline values with whey protein intake. Additionally, after analyzing muscle protein synthesis studies that included resistance exercise along with whey provisions, researchers found that participants had a statistically significant increase in lean body mass of 2.24 kg (4.9 pounds,) on average, when whey protein was used in conjunction with resistance exercise.

"There is a growing body of research that supports the benefits of whey protein for weight maintenance and lean body mass," said Dominik D. Alexander, PhD, MSPH , principal investigator. "By conducting this meta-analysis we were able to better evaluate the collective power of each individual study. The results indicate that there is something unique about whey protein, compared to other protein sources and carbohydrates, when it comes to building lean body mass and maintaining or losing weight."

Whey protein is a high-quality protein naturally found in dairy. It is a complete protein containing all of the essential amino acids ("building blocks") the body needs, and is rapidly digestible. Whey protein is also one of the best sources of a subgroup of three essential amino acids, called branched-chain amino acids (BCAAs), which include leucine, isoleucine and valine. Unlike other amino acids, BCAAs are almost exclusively taken up and used by muscle. And, among common food sources of BCAAs, whey protein contains one of the highest levels of leucine, which has been shown to influence muscle growth.

This research is one of several studies supported by the Whey Protein Research Consortium, an international partnership of dairy cooperatives, associations, processors and multinational companies working together to support whey research. The Consortium's first study by Dr. David Baer, USDA, found that daily consumption of whey protein, but not soy protein, led to lower body weight, body fat and waist circumference compared to carbohydrates in free-living overweight and obese adults.

"These research findings support the Consortium's goal to create a strong scientific foundation demonstrating the health and wellness benefits of whey protein," said Bryan Helwig, PhD, Whey Protein Research Consortium. "This research provides further evidence demonstrating the benefits of whey proteins as they relate to body composition," said Dr. Helwig.

The meta-analysis can be accessed here: http://www.tandfonline.com/doi/full/10.1080/07315724.2013.875365#.U0wBPMf6Ges

Study Details

The Study: A meta-analysis was conducted to examine the effect of whey protein (WP),with or without resistance exercise, on body weight and body composition in randomized controlled trials (RCTs) conducted in generally healthy adult study populations. A comprehensive literature search was conducted to identify RCTs that investigated WP (concentrate, isolate, or hydrolystate) and body weight, body mass index (BMI), body fat,lean body mass (LBM), fat-free mass (FFM), and waist circumference. Random effects meta-analyses were conducted to generate weighted group mean differences (WGMD) for between group comparisons (WP vs. other protein sources or carbohydrates) and within-WP group comparisons (i.e., differences from baseline to trial end). Studies were classified into two distinct groupsWP as a supplement without dietary modification (WPS) and WP as a replacement for other sources of calories (WPR)and were meta-analyzed separately. Subgroup analyses included examining the effect of resistance exercise and type of WP on the relationship between WP and body composition.

Results: Fourteen RCTs were included, with a total of 626 adult study completers. Five studies examined the effects of WPR whereas the remaining nine studies examined the effects of WPS. Body weight (WGMD: -4.20kg, 95% CI: -7.67, -0.73) and body fat (WGMD: -3.74kg, 95% CI: -19 5.98, -1.50) were significantly decreased from baseline in the WPR within-group analyses. In the between-group analyses, the effects of WP were more favorable when compared with carbohydrates than protein sources other than whey, although findings did not reach statistical significance. Results from the subgroup analyses indicated a statistically significant increase in LBM (WGMD: 2.24 kg, 95% CI: 0.66, 3.81) among studies that included a resistance exercise component along with WP provision.

Conclusions: The current body of literature supports the use of WP, either as a supplement combined with resistance exercise or as part of a weight-loss or weight-maintenance diet, to improve body composition parameters.


'/>"/>

Contact: Sheila Weiss
sweiss@foodminds.com
202-664-4717
Whey Protein Research Consortium
Source:Eurekalert

Related biology news :

1. Meta-analysis: Bug and weed killers, solvents may increase risk of Parkinsons disease
2. ISU engineer builds instrument to study effects of genes, environment on plant traits
3. International consortium builds Google Map of human metabolism
4. Aarhus University builds research station in North Greenland
5. UC Santa Cruz builds national data center for cancer genome research
6. Snowstorms and power outages present elevated risk for carbon monoxide poisoning
7. Tiny power generator runs on spit
8. The power of poison: Study examines pesticide poisoning of Africas wildlife
9. Small biomass power plants could help rural economies, stabilize national power grid, MU study finds
10. Pond-dwelling powerhouses genome points to its biofuel potential
11. Exercise targets cellular powerhouses to improve heart function
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/11/2017)... Florida , April 11, 2017 ... a security technology company, announces the appointment of independent Directors ... Bendheim to its Board of Directors, furthering the company,s ... ... of NXT-ID, we look forward to their guidance and benefiting ...
(Date:4/4/2017)... , April 4, 2017   EyeLock LLC ... announced that the United States Patent and Trademark Office ... broadly covers the linking of an iris image with ... transaction) and represents the company,s 45 th issued ... patent is very timely given the multi-modal biometric capabilities ...
(Date:3/29/2017)... , March 29, 2017  higi, the health ... in North America , today announced ... and the acquisition of EveryMove. The new investment and ... set of tools to transform population health activities through ... lifestyle data. higi collects and secures data ...
Breaking Biology News(10 mins):
(Date:7/18/2017)... ... July 18, 2017 , ... Nanomedical Diagnostics, a ... announces the launch of a new NTA biosensor chip for use with its ... the kinetics of polyhistidine-tagged (His-tagged) molecules quickly and reliably. , “Recombinant proteins ...
(Date:7/18/2017)... ... July 18, 2017 , ... ... has released the first phase of the Allotrope Framework for commercial use. , ... were created to “not only elevate the critical role of information technology in ...
(Date:7/17/2017)... ... 17, 2017 , ... OHAUS Corporation, a leading worldwide manufacturer ... new line of Heavy-Duty Orbital Shakers today. , Eight New Models Available, OHAUS ... applications. These shakers are ideal for load capacities from 35 to 150 ...
(Date:7/16/2017)... ... July 16, 2017 , ... OHAUS Corporation, a leading ... of its new line of Rocking and Waving Shakers today. , Five New ... analog and digital) for laboratory applications in a variety of environmental conditions. Rocking ...
Breaking Biology Technology: