The Claim

Acute ingestion of β-hydroxy β-methylbutyrate (HMB) is associated with increased expression of the amino acid transporters SLC36A1 (PAT1) and SLC7A5 (LAT1) in human skeletal muscle, which are involved in the transport of essential amino acids and the activation of mTORC1 signaling.

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 exercise is linked to higher levels of two specific proteins in muscle tissue that help bring in amino acids and trigger muscle growth pathways.

See the scientific wording

Acute HMB ingestion is associated with increased expression of the amino acid transporters SLC36A1 (PAT1) and SLC7A5 (LAT1) in human skeletal muscle, which are critical for transporting essential amino acids into muscle cells and activating mTORC1 signaling, suggesting a potential mechanism for HMB’s anabolic effects.

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 makes muscle cells produce more of two special transporters that help bring in building blocks for muscle growth, which explains why HMB might help muscles grow stronger.

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

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