# \#peptide

**URL:** https://www.rapamycin.news/tag/peptide/117.md

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## [GHK-cu rescues cigarette smoking‐induced skeletal dysfunction via sirt1](https://www.rapamycin.news/t/ghk-cu-rescues-cigarette-smoking-induced-skeletal-dysfunction-via-sirt1/19406)

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**Author:** [@qBx123Yk](https://www.rapamycin.news/u/qBx123Yk)\
**Replies:** 30\
**Last updated:** [July 1, 2026, 1:36pm UTC](https://www.rapamycin.news/t/ghk-cu-rescues-cigarette-smoking-induced-skeletal-dysfunction-via-sirt1/19406 "2026-07-01T13:36:19Z")

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Skeletal muscle dysfunction affects about one-third of COPD patients and worsens clinical outcomes. While some treatments like androgens exist, effective clinical drugs are still lacking. This study highlights the potential role of GHK-cu, a peptide found in lower levels in COPD patients, in improving muscle function. Many think of this peptide as having more beneficial effects on the skin, and …

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## [Overview of Epitalon—Highly Bioactive Pineal Tetrapeptide with Promising Properties](https://www.rapamycin.news/t/overview-of-epitalon-highly-bioactive-pineal-tetrapeptide-with-promising-properties/22766)

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**Author:** [@Joseph](https://www.rapamycin.news/u/Joseph)\
**Replies:** 28\
**Last updated:** [June 4, 2026, 10:23pm UTC](https://www.rapamycin.news/t/overview-of-epitalon-highly-bioactive-pineal-tetrapeptide-with-promising-properties/22766 "2026-06-04T22:23:17Z")

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## [Peptides + rapa + acarbose](https://www.rapamycin.news/t/peptides-rapa-acarbose/24903)

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**Author:** [@Ben\_S](https://www.rapamycin.news/u/Ben_S)\
**Replies:** 4\
**Last updated:** [May 29, 2026, 1:54pm UTC](https://www.rapamycin.news/t/peptides-rapa-acarbose/24903 "2026-05-29T13:54:55Z")

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I’ve been taking rapa for around 3 years now / paired with metformin and the past year or two acarbose. I’m would like to try some peptides and am curious what is the general consensus around it.

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## [Are people using Peptides much? Do we know of reliable sources?](https://www.rapamycin.news/t/are-people-using-peptides-much-do-we-know-of-reliable-sources/23706)

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**Author:** [@vic](https://www.rapamycin.news/u/vic)\
**Replies:** 2\
**Last updated:** [February 23, 2026, 3:30am UTC](https://www.rapamycin.news/t/are-people-using-peptides-much-do-we-know-of-reliable-sources/23706 "2026-02-23T03:30:11Z")

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I was thinking of trying out SS-31 (Elamipretide) for mitochondria support and Semax for cognitive support. The two sources I was thinking of are https://buy.nobledragons.com/ and https://www.peptidesciences.com/. Has anyone used these? Would appreciate any insights into sourcing. thanks