The Claim

Whey protein supplementation at a dosage of 25 grams twice daily for 12 weeks increases gait speed by 0.08 meters per second in healthy active older men aged 67 years, independent of resistance exercise.

Source: Effects of resistance exercise and whey protein supplementation on skeletal muscle strength, mass, physical function, and hormonal and inflammatory biomarkers in healthy active older men: A randomised, double-blind, placebo-controlled trial.

What the research says

Supports is higher

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

Supports
61score
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

In healthy active men aged 67, taking 25 grams of whey protein twice daily for 12 weeks results in a 0.08 meters per second increase in walking speed, regardless of whether they perform resistance exercise.

See the scientific wording

Whey protein supplementation (25 g twice daily) for 12 weeks increases gait speed by 0.08 m/s in healthy active older men aged 67 years, independent of resistance exercise.

Why this might work

Whey protein gives the body essential building blocks that speed up the repair and renewal of muscle proteins, allowing muscles to contract more smoothly and efficiently, which makes walking faster.

Supported mechanismbased on 1 study

What the research says

1 study

  1. Study: Effects of resistance exercise and whey protein supplementation on skeletal muscle strength, mass, physical function, and hormonal and inflammatory biomarkers in healthy active older men: A randomised, double-blind, placebo-controlled trial.

    This study found that older men who drank two whey protein shakes a day for three months walked a little faster—by about 0.08 meters per second—even though they didn’t lift weights. So yes, the protein shakes alone helped them walk better.

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.