The Claim

A single 3.42-gram oral dose of beta-hydroxy beta-methylbutyrate (HMB) in healthy young males is associated with significant changes in skeletal muscle gene expression, including upregulation of genes involved in amino acid transport (SLC36A1, SLC7A5), RNA polymerase activity (POLR1A, POLR2A, POLR3A), and JAK-STAT signaling, and downregulation of circadian rhythm genes (PER2, PER3, NR1D1, NR1D2), suggesting a transcriptional profile consistent with enhanced anabolic signaling and metabolic adaptation.

Source: The Influence of Acute Beta-Hydroxy Beta-Methylbutyrate (HMB) Ingestion on the Human Skeletal Muscle Transcriptome

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.

How it works
1 study reviewed
In plain English

Taking a 3.42-gram dose of HMB orally changes the activity of specific genes in skeletal muscle of healthy young men, increasing those related to nutrient transport and cellular signaling while decreasing those involved in circadian regulation, indicating a shift in molecular activity that may support muscle growth and metabolic adjustment.

See the scientific wording

A single 3.42-gram oral dose of beta-hydroxy beta-methylbutyrate (HMB) in healthy young males is associated with significant changes in skeletal muscle gene expression, including upregulation of genes involved in amino acid transport (SLC36A1, SLC7A5), RNA polymerase activity (POLR1A, POLR2A, POLR3A), and JAK-STAT signaling, and downregulation of circadian rhythm genes (PER2, PER3, NR1D1, NR1D2), suggesting a transcriptional profile consistent with enhanced anabolic signaling and metabolic adaptation.

What the research says

1 study

  1. Study: The Influence of Acute Beta-Hydroxy Beta-Methylbutyrate (HMB) Ingestion on the Human Skeletal Muscle Transcriptome

    This study gave young men a small HMB pill and found that their muscles changed gene activity in ways that help build and repair muscle, just like the claim said. So yes, the pill does trigger those helpful muscle changes.

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

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