The Claim

In recreationally active young men undergoing 8 weeks of leg extension resistance training, creatine monohydrate supplementation does not significantly increase quadriceps muscle size compared to placebo, but may increase the proportion of individuals exceeding the minimal important difference in vastus lateralis cross-sectional area.

Source: Effects of supplementation with a blend of trisodium citrate, creatine monohydrate, leucine, and blueberry extract on training-induced changes in leg extension strength, endurance, and muscle size

What the research says

Supports is higher

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

Supports
53score
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

In young men doing leg exercises for 8 weeks, taking creatine monohydrate does not lead to a measurable increase in quadriceps muscle size compared to a placebo, but it may result in more individuals achieving a clinically meaningful increase in the size of the vastus lateralis muscle.

See the scientific wording

In recreationally active young men undergoing 8 weeks of leg extension resistance training, supplementation with creatine monohydrate does not significantly increase quadriceps muscle size more than placebo, but may increase the proportion of individuals exceeding the minimal important difference in vastus lateralis cross-sectional area.

Why this might work

Creatine helps muscle cells recover faster between hard lifts by supplying more quick energy, allowing some people to do more work during training. This extra work puts more stress on the muscle fibers, which triggers more building of muscle protein, especially in individuals whose bodies respond strongly to the increased demand.

Supported mechanismbased on 1 study

What the research says

1 study

  1. Study: Effects of supplementation with a blend of trisodium citrate, creatine monohydrate, leucine, and blueberry extract on training-induced changes in leg extension strength, endurance, and muscle size

    In young men doing leg extensions, taking creatine didn’t make their thighs noticeably bigger on average, but more people who took creatine reached a meaningful level of muscle growth in one thigh muscle compared to those who took nothing.

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

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