The Claim

In healthy adults over 65 years of age, daily supplementation with 40 grams of collagen protein for one year has no significant effect on muscle size, strength, or functional capacity compared to carbohydrate supplementation.

Source: The effect of daily protein supplementation, with or without resistance training for 1 year, on muscle size, strength, and function in healthy 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
70score
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 40 grams of collagen protein every day for a year does not change muscle size, strength, or physical function in healthy adults over 65 compared to taking carbohydrate supplements.

See the scientific wording

In healthy adults over 65 years of age, daily supplementation with 40 grams of collagen protein for one year has no significant effect on muscle size, strength, or functional capacity compared to carbohydrate supplementation.

Why this might work

Taking collagen protein by itself does not make muscles bigger or stronger because muscles need to be worked hard to respond to protein. Without resistance exercise, the body does not trigger the signals that tell muscle cells to build new proteins, so the collagen is not used to repair or grow muscle tissue.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: The effect of daily protein supplementation, with or without resistance training for 1 year, on muscle size, strength, and function in healthy older adults: A randomized controlled trial.

    The study found that taking 40 grams of collagen protein every day for a year didn’t make older adults’ legs stronger or bigger than taking sugar. So, collagen pills didn’t help — just like sugar.

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.