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ACE-031 is an engineered fusion protein that binds myostatin and related signals.

2
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The goal was to investigate muscle disease, not to validate a bodybuilding product.

3
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A randomized, placebo-controlled trial studied boys with Duchenne muscular dystrophy.

4
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Safety was the primary objective, alongside measurements related to body composition and physical

5
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function.

6
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The study stopped early after safety concerns involving nosebleeds and widened small blood vessels.

7
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The reported walking-distance difference was not statistically significant.

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An experimental signal is not enough to establish useful muscle improvement.

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Safety and meaningful function have to be evaluated together before drawing treatment conclusions.