The Claim
A daily protein intake of 1.2–1.6 g/kg of body weight during a very low-calorie diet is associated with reduced loss of skeletal muscle mass compared to lower protein intakes in obese adults, through increased muscle protein synthesis during energy restriction.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In obese adults on a very low-calorie diet, consuming 1.2 to 1.6 grams of protein per kilogram of body weight each day results in less muscle loss than consuming less protein, because muscle protein synthesis remains higher at this intake level.
See the scientific wording
A daily protein intake of 1.2–1.6 g/kg of body weight during a very low-calorie diet (VLCD) is associated with reduced loss of skeletal muscle mass compared to lower intakes, particularly in obese adults, by supporting muscle protein synthesis during energy restriction.
When a person eats very few calories, the body starts breaking down muscle to make sugar for energy. Eating enough protein provides the essential building blocks that keep muscle from breaking down. These building blocks turn on a signal in muscle cells that tells the body to make new muscle proteins instead of breaking them down. This keeps muscle mass from shrinking even when calories are very low.
What the research says
1 studyThe review cites studies showing that protein intakes below 0.8–1.0 g/kg/day failed to prevent muscle loss during VLCDs, while intakes of 1.2–1.6 g/kg/day were associated with better preservation. This pattern supports an association between higher protein intake and reduced muscle loss.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.