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A collective for peptide knowledge for longevity. Education, protocols, and transparent information for South Africans exploring peptides responsibly.

SS-31 β€” In 2004, a compound built to relieve pain turned out to do something else entirely: concentrate itself almost exclusively inside mitochondria, the part of the cell that generates energy.

Pharmacologist Hazel Szeto and chemist Peter Schiller were testing synthetic opioids when they found it β€” a peptide accumulating inside mitochondria at levels roughly five thousand times higher than the surrounding cell. They named it SS-31; its clinical name is elamipretide, sold under the brand name FORZINITY by Stealth BioTherapeutics.

The clearest proving ground for it was Barth syndrome, a genetic disorder that leaves heart and skeletal muscle chronically short on energy from birth. The first trial, a 12-patient Phase 2/3 study, missed its primary endpoints β€” a six-minute walk test and a standard symptom scale β€” after 12 weeks. In the open-label extension that followed, at 36 weeks, patients improved by 95.9 meters on the walk test and 2.1 points on the symptom scale. 

A larger follow-up trial, TAZPOWER, tracked 180 patients over 168 weeks and recorded a cumulative 96.1-meter improvement, along with measurable gains in knee extensor muscle strength β€” the specific endpoint the FDA cited when it granted accelerated approval in September 2025.

This approval carries a specific condition: confirmatory trials are still required to keep elamipretide on the market long-term.

What Szeto and Schiller found by accident became the basis for a drug that targets the exact cells that fail first when mitochondria do: heart muscle, skeletal muscle. What that means for mitochondrial health beyond Barth syndrome is still an open question.

Follow @peptideweekly for more.

#biology #science #education #peptides #health 04/09/2026

SS-31 β€” In 2004, a compound built to relieve pain turned out to do something else entirely: concentrate itself almost exclusively inside mitochondria, the part of the cell that generates energy. Pharmacologist Hazel Szeto and chemist Peter Schiller were testing synthetic opioids when they found it β€” a peptide accumulating inside mitochondria at levels roughly five thousand times higher than the surrounding cell. They named it SS-31; its clinical name is elamipretide, sold under the brand name FORZINITY by Stealth BioTherapeutics. The clearest proving ground for it was Barth syndrome, a genetic disorder that leaves heart and skeletal muscle chronically short on energy from birth. The first trial, a 12-patient Phase 2/3 study, missed its primary endpoints β€” a six-minute walk test and a standard symptom scale β€” after 12 weeks. In the open-label extension that followed, at 36 weeks, patients improved by 95.9 meters on the walk test and 2.1 points on the symptom scale. A larger follow-up trial, TAZPOWER, tracked 180 patients over 168 weeks and recorded a cumulative 96.1-meter improvement, along with measurable gains in knee extensor muscle strength β€” the specific endpoint the FDA cited when it granted accelerated approval in September 2025. This approval carries a specific condition: confirmatory trials are still required to keep elamipretide on the market long-term. What Szeto and Schiller found by accident became the basis for a drug that targets the exact cells that fail first when mitochondria do: heart muscle, skeletal muscle. What that means for mitochondrial health beyond Barth syndrome is still an open question. Follow @peptideweekly for more. #biology #science #education #peptides #health

26/06/2026
Top 10 Peptides to Reverse Aging (A Physician's Guide) 09/06/2026

https://youtu.be/Jw9kp1s7FMI?si=vAH6vTTpD7Pa9xM_

Top 10 Peptides to Reverse Aging (A Physician's Guide) Welcome to the ultimate resource for Longevity, Hormone Optimizatio...

07/06/2026

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