The Claim

In previously untrained older women aged 68.6 ± 6.3 years undergoing 24 weeks of standardized resistance training, higher habitual daily protein intake is positively associated with increases in skeletal muscle mass, with a statistically significant breakpoint at approximately 1.1 grams of protein per kilogram of body weight per day.

Source: Is There a Minimum Protein Intake Associated With Resistance Training to Optimize Skeletal Muscle Mass Gains in Untrained Older Women?

What the research says

Supports is higher

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

Supports
44score
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.

Correlation
1 study reviewed
In plain English

In older women who are new to resistance training and follow a standardized program for 24 weeks, consuming more than 1.1 grams of protein per kilogram of body weight daily is associated with greater gains in skeletal muscle mass.

See the scientific wording

In previously untrained older women aged 68.6 ± 6.3 years undergoing 24 weeks of standardized resistance training, higher habitual daily protein intake is positively associated with increases in skeletal muscle mass, with a statistically significant breakpoint at approximately 1.1 grams of protein per kilogram of body weight per day, suggesting this intake level may be necessary to optimize muscle gains in this population.

Why this might work

When older women lift weights, their muscles need more protein to build new muscle fibers. Eating at least 1.1 grams of protein per kilogram of body weight each day provides enough building blocks to keep making muscle faster than it breaks down. Eating more than that does not make muscle grow any faster.

Supported mechanismbased on 1 study

What the research says

1 study

  1. Study: Is There a Minimum Protein Intake Associated With Resistance Training to Optimize Skeletal Muscle Mass Gains in Untrained Older Women?

    In older women just starting weight training, eating about 1.1 grams of protein per kilogram of body weight each day helped them build more muscle than eating less — but eating more didn’t help much more. The study found this exact number matters for muscle gains.

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

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