The Claim
Protein supplementation during resistance training in frail older adults has no significant effect on muscle mass, handgrip strength, gait speed, or chair stand test scores, regardless of baseline protein intake.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In frail older adults, taking protein supplements while doing strength training does not lead to measurable improvements in muscle size, grip strength, walking speed, or the ability to stand up from a chair, even if their usual protein intake is low.
See the scientific wording
Protein supplementation during resistance training in frail older adults did not significantly improve muscle mass, handgrip strength, or physical performance outcomes such as gait speed or chair stand test scores, even in subgroups with low baseline protein intake.
When older adults with low protein intake consume supplemental protein, their blood amino acid levels rise, which turns on a cellular switch that tells muscle cells to build more protein. But in frail older adults, even when this switch is turned on, the muscle cells do not grow larger or stronger enough to improve physical function because the signals to build muscle are too weak or too slow to overcome existing muscle deterioration.
What the research says
1 studyAdding protein shakes to strength training didn't help most frail older adults get stronger or build more muscle, even if they weren't eating much protein before — though a small group who ate very little protein did get noticeably stronger.
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.