Research

Energy balance

In individuals with MASLD undergoing ~30% caloric restriction, resistance training preserves skeletal muscle mass and improves functional strength, whereas adding whey protein supplementation (1.5 g/kg/day) provides no additional benefit over resistance training alone (0.8 g/kg/day).

If you have MASLD and are cutting calories significantly, focus on resistance training and getting adequate protein (around 0.8 g/kg/day). Adding extra whey protein (up to 1.5 g/kg/day) does not provide extra muscle or strength benefits in this specific scenario. The energy deficit blunts the potential synergy of high protein and exercise.

ModerateQualifiesMEDIUM confidence
In individuals with MASLD undergoing severe CR, ≥0.8 g·kg−1·day−1 of protein preserves skeletal muscle mass. However, the anabolic synergy of resistance training and protein for functional adaptation appears to be blunted by the substantial energy deficit.
Chae Been Kim et al. · Nutrients · 2025

Why this rating

Randomized controlled trial with double-blinding, but small sample size (n=45) and short duration (4 weeks) limit generalizability.

Source

Independent and Combined Effects of Resistance Training and Whey Protein on Skeletal Muscle Mass and Function in Individuals with MASLD Under Caloric Restriction

Chae Been Kim et al. · Nutrients · 2025

DOI 10.3390/nu18010083

rct · n=45
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →