The Claim

Acute ingestion of HMB is associated with upregulation of genes in the JAK-STAT and mTOR signaling pathways (including STAM, PIK3RR, SGK1) and downregulation of FOXO3 in human skeletal muscle, indicating a transcriptional shift toward anabolic signaling and away from catabolic pathways.

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 HMB shortly before or after exercise is linked to changes in the activity of certain genes in muscle tissue that are involved in building proteins and reducing protein breakdown.

See the scientific wording

Acute HMB ingestion is associated with upregulation of genes in the JAK-STAT and mTOR signaling pathways (e.g., STAM, PIK3RR, SGK1) and downregulation of FOXO3 in human skeletal muscle, suggesting a transcriptional shift toward anabolic signaling and away from catabolic pathways.

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 found that taking HMB (a supplement related to protein) turns on genes that help build muscle and turns off genes that break it down, 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.

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