Research

Hormonal

Older ICU patients (>60 years) require higher protein intakes (approaching 2.0–2.5 g/kg/day) to achieve positive nitrogen balance and stimulate muscle protein synthesis, due to age-related anabolic resistance.

If you are over 60 and in the ICU, your body needs significantly more protein than the standard recommendation to stop muscle loss. Aim for 2.0 to 2.5 grams of protein per kilogram of your usual body weight daily, prioritizing high-quality proteins rich in leucine. This is safe unless you have severe kidney failure. Combine this nutrition with early physical therapy or movement to maximize muscle retention.

ModerateSupportsMEDIUM confidence
The encouraging conclusion, however, is that older patients in the ICU were able to achieve nitrogen equilibrium but only with protein intakes that approached 2–2.5 g/kg/d.
Stuart M. Phillips et al. · Nutrition in Clinical Practice · 2017

Why this rating

Based on observational nitrogen balance studies and expert consensus/reviews rather than large-scale RCTs specifically for this high-dose protocol in older ICU patients.

Source

Protein Turnover and Metabolism in the Elderly Intensive Care Unit Patient

Stuart M. Phillips et al. · Nutrition in Clinical Practice · 2017

DOI 10.1177/0884533616686719

narrative_reviewCited 53×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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