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Mitochondrial research

TAZPOWER: separating the randomized result from the open-label extension

The small Barth-syndrome trial did not meet its primary endpoints in the randomized phase.

Clinical trialPaper year: 2021Elamipretide (SS-31)

01 / DESIGN

What was studied?

Twelve participants with Barth syndrome entered a double-blind, placebo-controlled crossover study. Walking distance and a symptom scale were primary endpoints. A subset continued into an open-label extension after the randomized comparison.

02 / FINDINGS

What did the researchers report?

Neither primary endpoint was met during the randomized portion. Improvements in walking distance and symptom scores were reported during the later open-label period, which had fewer participants and no concurrent blinded placebo comparison.

03 / LIMITS

How should it be interpreted?

Findings from these two phases should not be combined as if they carried the same causal certainty. Rare-disease sample size, crossover design and attrition matter. The study concerns a defined pharmaceutical product and disease population, not general energy-enhancement claims for research materials.

Voltera Peptide editorial reading note. Based on the linked source record. Methods and corrections.

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