The Claim

Short-term creatine monohydrate supplementation (20 g/day for 3 days followed by 5 g/day for 7 days) causes a significant increase in fat-free mass, total body water, and body weight in healthy young men, with an average 1.6% increase in fat-free mass and 2.2% increase in total body water, indicating acute fluid retention and lean mass changes independent of exercise.

Source: Global and targeted gene expression and protein content in skeletal muscle of young men following short-term creatine monohydrate supplementation.

What the research says

Supports is higher

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

Supports
60score
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 creatine for just a week can make young, healthy guys gain a little weight and look more muscular—even if they don’t work out, mostly because of water holding in their muscles.

See the scientific wording

Short-term creatine monohydrate supplementation (20 g/day for 3 days followed by 5 g/day for 7 days) causes a significant increase in fat-free mass, total body water, and body weight in healthy young men, with an average 1.6% increase in fat-free mass and 2.2% increase in total body water, indicating acute fluid retention and lean mass changes independent of exercise.

What the research says

1 study
  1. Study: Global and targeted gene expression and protein content in skeletal muscle of young men following short-term creatine monohydrate supplementation.

    The study gave young men the same creatine dose described in the claim and found they gained lean mass and water weight, just like the claim says.

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.