The Claim

In healthy older adults undergoing 12 weeks of resistance training, protein intake exceeding 1.2 g/kg/d from dairy or soy sources increases daily protein consumption compared to usual intake below 1.2 g/kg/d, with no difference in lean mass, physical function, or mental health outcomes between the two groups.

Source: Muscle strength gains during resistance exercise training are attenuated with soy compared with dairy or usual protein intake in older adults: A randomized controlled trial.

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
51score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Quantitative
1 study reviewed
In plain English

Among healthy older adults doing 12 weeks of resistance training, consuming more than 1.2 grams of protein per kilogram of body weight daily from dairy or soy increases total protein intake compared to lower intake, but does not change lean mass, physical function, or mental health.

See the scientific wording

In healthy older adults undergoing 12 weeks of resistance training, protein intake exceeding 1.2 g/kg/d from either dairy or soy sources significantly increased daily protein consumption compared to usual intake (<1.2 g/kg/d), with no difference in lean mass, physical function, or mental health outcomes between groups.

Why this might work

Eating more protein from dairy or soy raises the amount of amino acids in the blood, but the body does not use these extra amino acids to build more muscle or improve movement or mood during 12 weeks of strength training.

Supported mechanismbased on 1 study

What the research says

1 study

  1. Study: Muscle strength gains during resistance exercise training are attenuated with soy compared with dairy or usual protein intake in older adults: A randomized controlled trial.

    The abstract reports that protein intake was significantly higher in the soy and dairy groups compared to usual protein, yet no significant differences were found in lean mass, physical function, or mental health outcomes between groups, indicating that increased protein intake alone did not enhance these secondary outcomes.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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