The Claim

Administration of ACE-031 to common marmosets over 14 weeks is not associated with adverse changes in serum chemistries or gross tissue morphology, despite the occurrence of vascular adverse events in prior human trials, indicating species-specific differences in tolerability.

Source: ACE-031, a soluble activin type IIB receptor, increases muscle mass and strength in the common marmoset (Callithrix jacchus)

What the research says

Supports is higher

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

Supports
8score
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.

Description
1 study reviewed
In plain English

In common marmosets given ACE-031 for 14 weeks, no harmful changes were observed in blood chemistry or tissue structure, even though similar treatment in humans caused blood vessel problems, suggesting the two species respond differently to this compound.

See the scientific wording

The safety profile of ACE-031 in common marmosets over 14 weeks shows no adverse effects on serum chemistries or gross tissue morphology, despite prior human trials reporting vascular adverse events, suggesting species-specific differences in tolerability.

Why this might work

ACE-031 binds to proteins that normally limit muscle growth, stopping them from sending signals that break down muscle tissue; this makes muscles bigger and stronger, and in marmosets, this process does not harm blood vessels or organs, unlike in humans where the same drug causes bleeding and vascular problems.

Supported mechanismbased on 1 study

What the research says

1 study
  1. Study: ACE-031, a soluble activin type IIB receptor, increases muscle mass and strength in the common marmoset (Callithrix jacchus)

    In monkeys, ACE-031 made muscles bigger and stronger without causing any visible harm, even though it caused bleeding in people — suggesting monkeys and humans react differently to the drug.

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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