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Proteins: Dietary Sources and Requirements01:28

Proteins: Dietary Sources and Requirements

Consuming animal-based products offers high-quality proteins that contain optimal levels and combinations of essential amino acids, crucial for tissue repair and growth. Foods like eggs, milk, fish, and most meats are a source of complete proteins. Legumes and cereals are abundant in proteins; however, they typically lack a full range of essential amino acids. As a result, they are considered incomplete protein sources. Some plant sources like soybeans, quinoa, and amaranth do contain complete...
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In geriatric patients, renal physiology undergoes significant changes, including diminished renal blood flow and a lower glomerular filtration rate (GFR), leading to alterations in medication clearance. Drugs such as aminoglycoside antibiotics, lithium, and digoxin, which rely on glomerular filtration for removal from the body, particularly impact pharmacokinetics. These drugs tend to have slower clearance rates in older adults, necessitating careful dosage considerations.Evaluation of renal...
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Updated: Jun 30, 2026

Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry
08:52

Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry

Published on: April 6, 2022

Optimal protein intake in the elderly.

Robert R Wolfe1, Sharon L Miller, Kevin B Miller

  • 1University of Arkansas for Medical Sciences, Department of Geriatrics, Center for Translational Research in Aging & Longevity, 4301W Markham Street, Slot 806, Little Rock, AR 72205, USA. rwolfe2@uams.edu

Clinical Nutrition (Edinburgh, Scotland)
|September 30, 2008
PubMed
Summary
This summary is machine-generated.

The current protein recommendation may be insufficient for older adults. Increasing protein intake can enhance muscle health, strength, and overall function in the elderly population.

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Area of Science:

  • Gerontology
  • Nutrition Science
  • Human Physiology

Background:

  • The Recommended Dietary Allowance (RDA) for protein is 0.8 g/kg/day for adults.
  • This RDA value is intended to prevent lean body mass loss.
  • Emerging evidence suggests higher protein intake may benefit elderly individuals.

Purpose of the Study:

  • To evaluate the adequacy of the current protein RDA for the elderly.
  • To explore the health benefits of increased protein intake in older adults.
  • To determine an optimal protein intake level for elderly health and function.

Main Methods:

  • Literature review and synthesis of existing research on protein intake and elderly health.
  • Analysis of studies examining the effects of protein on muscle mass, strength, and function.
  • Assessment of potential risks and benefits associated with elevated protein consumption.

Main Results:

  • The current RDA of 0.8 g/kg/day may be insufficient for the elderly population.
  • Increased protein intake (e.g., 1.5 g/kg/day) is associated with improved muscle mass, strength, and function.
  • Concerns regarding negative impacts on bone, kidney, neurological, and cardiovascular health are largely unfounded; many of these are improved.
  • Optimal protein intake appears to be around 1.5 g/kg/day or 15-20% of total calories.

Conclusions:

  • The protein RDA for adults may not be optimal for the elderly.
  • Higher protein intake supports better health outcomes and physical function in older adults.
  • A target intake of 1.5 g/kg/day is recommended for elderly individuals to optimize health and function.