The Claim

Protein supplementation at 20g/day for 12 weeks has no effect on health-related quality of life in healthy older adults, as measured by the SF-36, regardless of protein source.

Source: Impact of increased protein intake in older adults: a 12-week double-blind randomised controlled trial.

What the research says

Supports is higher

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

Supports
71score
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.

Cause and effect
1 study reviewed
In plain English

Taking 20 grams of protein per day for 12 weeks does not change health-related quality of life in healthy older adults, as measured by the SF-36 questionnaire, no matter what type of protein is used.

See the scientific wording

Protein supplementation at 20g/day for 12 weeks does not improve health-related quality of life in healthy older adults, as measured by the SF-36, regardless of protein source.

Why this might work

The body's stress and well-being signals stay the same because the extra protein doesn't alter muscle repair, inflammation, or brain chemistry related to how a person feels about their health.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Impact of increased protein intake in older adults: a 12-week double-blind randomised controlled trial.

    Older adults who drank 20 grams of protein daily for 12 weeks—whether from plants or milk—didn’t feel any better in how they viewed their health or well-being compared to those who didn’t take extra protein.

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

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.