Scientists are genuinely divided on this question.

Not medical advice — just what the research says.

What's still open

What the evidence found 3 findings
Based on 11 sources:
PMC - NIH peer-reviewed View
PMC - NIH peer-reviewed View
Science Direct peer-reviewed View
Protein Intake and Sarcopenia in Older Adults: A Systematic Review peer-reviewed View
Protein Requirements and Recommendations for Older People peer-reviewed View
Prevalence of protein intake below recommended in community peer-reviewed View
Perspective: Protein Requirements and Optimal Intakes in Aging peer-reviewed View
PMC peer-reviewed View
Nutrition Reviews peer-reviewed View
ResearchGate peer-reviewed View
PMC - A Look at Plant-Based Diets peer-reviewed View
Based on 11 sources:
PMC - Dietary Protein and Muscle Mass: Translating Science peer-reviewed View
Hojfeldt et al. research on protein intake and muscle health peer-reviewed View
PMC peer-reviewed View
PMC systematic review and meta-analysis peer-reviewed View
Examine.com study summary institutional View
PMC research article peer-reviewed View
Perspective: Protein Requirements and Optimal Intakes in Aging peer-reviewed View
Protein intake and bone mineral density: Cross‐sectional study peer-reviewed View
Evidence-Based Recommendations for Optimal Dietary Protein peer-reviewed View
NCBI Books peer-reviewed View
ResearchGate peer-reviewed View
Based on 10 sources:
PMC - NIH peer-reviewed View
Gatorade Sports Science Institute institutional View
PMC - NIH peer-reviewed View
PMC (PubMed Central) peer-reviewed View
Forks Over Knives institutional View
ScienceDirect peer-reviewed View
PubMed peer-reviewed View
PMC - Dietary Protein Distribution Positively Influences 24-h Muscle peer-reviewed View
PMC peer-reviewed View
PubMed peer-reviewed View
What research hasn't answered 2 gaps
PMC - NIH peer-reviewed View
PMC - NIH peer-reviewed View
Science Direct peer-reviewed View
Protein Intake and Sarcopenia in Older Adults: A Systematic Review peer-reviewed View
Protein Requirements and Recommendations for Older People peer-reviewed View
PMC - NIH peer-reviewed View
PMC - NIH peer-reviewed View
Science Direct peer-reviewed View
Protein Intake and Sarcopenia in Older Adults: A Systematic Review peer-reviewed View
Protein Requirements and Recommendations for Older People peer-reviewed View
Sources 18 findings
argumentation Unknown
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tree-leaf argumentation
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Generated by reaso.ai's editorial pipeline: claim restated, scientific consensus classified via 3-run majority vote, 18 findings enriched with attribution and study type, narrative written in neutral voice. No individual researcher has signed off on this specific analysis — see methodology for how the pipeline works. Built with Claude Sonnet by Anthropic. Updated April 16, 2026. How we do this →

Written by AI. Sources are linked for verification.