Cited by 92Muscle metabolism and nutritionNutrition and Health in AgingMuscle Physiology and Disorders

Whey protein and essential amino acids promote the reduction of adipose tissue and increased muscle protein synthesis during caloric restriction-induced weight loss in elderly, obese individuals

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Coker, Robert H, Miller, Sharon, Schutzler, Scott, Deutz, Nicolaas, Wolfe, Robert R·2012·Nutrition Journal

Abstract

BACKGROUND: Excess adipose tissue and sarcopenia presents a multifaceted clinical challenge that promotes morbidity and mortality in the obese, elderly population. Unfortunately, the mortality risks of muscle loss may outweigh the potential benefits of weight loss in the elderly. We have previously demonstrated the effectiveness of whey protein and essential amino acids towards the preservation of lean tissue, even under the conditions of strict bedrest in the elderly. METHODS: In the context of caloric restriction-based weight loss, we hypothesized that a similar formulation given as a meal replacement (EAAMR) would foster the retention of lean tissue through an increase in the skeletal muscle fractional synthesis rate (FSR). We also proposed that EAAMR would promote the preferential loss of adipose tissue through the increased energy cost of skeletal muscle FSR. We recruited and randomized 12 elderly individuals to an 8 week, caloric restriction diet utilizing equivalent caloric meal replacements (800 kcal/day): 1) EAAMR or a 2) competitive meal replacement (CMR) in conjunction with 400 kcal of solid food that totaled 1200 kcal/day designed to induce 7% weight loss. Combined with weekly measurements of total body weight and body composition, we also measured the acute change in the skeletal muscle FSR to EAAMR and CMR. RESULTS: By design, both groups lost ~7% of total body weight. While EAAMR did not promote a significant preservation of lean tissue, the reduction in adipose tissue was greater in EAAMR compared to CMR. Interestingly, these results corresponded to an increase in the acute skeletal muscle protein FSR. CONCLUSION: The provision of EAAMR during caloric restriction-induced weight loss promotes the preferential reduction of adipose tissue and the modest loss of lean tissue in the elderly population.

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  1. Campbell WW Trappe TA Wolfe RR Evans WJ The recommended dietary allowance for protein may not be adequate for older people to maintain skeletal muscle J Gerontol A Biol Sci Med Sci 2001 56 M373 M380 10.1093/gerona/56.6.M373 11382798 · DOI · Paper page

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Authors
Coker, R. H., Miller, S., Schutzler, S., Deutz, N., & Wolfe, R. R.
Affiliations
University of Arkansas for Medical Sciences (US)
Corresponding author
Coker, Robert H
Venue
Nutrition Journal
Published
2012-12
Volume
11
Issue
1
Pages
105-105
ISSN
1475-2891 (ISSN-L)
OpenAlex
W2156477187
Cited by
92
References
36
Citations by year
2026: 3 · 2025: 7 · 2024: 5 · 2023: 4 · 2022: 8 · 2021: 7 · 2020: 6 · 2019: 5 · 2018: 9 · 2017: 10 · 2016: 9 · 2015: 9 · 2014: 5 · 2013: 5
FWCI
2.88
Type
journal article
Language
en
Open access
Locations
  • Nutrition Journal (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
whey protein, essential amino acids, caloric restriction, weight loss, older adults, obesity, adipose tissue reduction, muscle protein synthesis, fractional synthesis rate, meal replacement, sarcopenia, body composition
MeSH terms
Whey Proteins, Adipose Tissue, Aged, Aged, 80 and over, Amino Acids, Essential, Body Composition, Body Weight, Energy Intake, Female, Humans, Male, Milk Proteins, Muscle Proteins, Obesity, Weight Loss, Muscle, Skeletal, Caloric Restriction

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