Research reference

Peptides studied in skeletal-muscle laboratory literature

Searches for "peptides for muscle growth" mostly return marketing. This page indexes the published laboratory research instead: which compounds have been studied against skeletal-muscle endpoints, what the studies actually reported, and where each record can be read on PubMed. Most of this literature is rodent and cell-culture work. None of it establishes an effect in people, and none of these compounds is approved for human use.

How to read this page. Compounds are ordered by how much published preclinical literature exists for the research area — not by how well anything is claimed to work. An "Extensive literature" label means many peer-reviewed studies exist to read, including negative and inconclusive ones. It is not a statement that the compound produces any effect, in a laboratory model or in a person. Every summary below describes what a specific study reported, with the PubMed record linked so you can read the source yourself.

BPC-157

Extensive literature

A synthetic pentadecapeptide derived from a sequence identified in gastric juice. It appears in the muscle literature mainly through studies of injured or impaired-healing rodent muscle, and in mechanistic work on growth-factor and nitric-oxide pathways.

Literature depth: One of the most-published research peptides, with a large rodent literature spanning muscle, tendon, and gastrointestinal tissue.

Skeletal muscle healing modelsTendon and ligament researchGrowth-factor pathway signalling

What the research reports

[1] Skeletal muscle healing. In a rat model of corticosteroid-impaired healing, BPC 157 was associated with improved recovery of injured skeletal muscle.

Impact of pentadecapeptide BPC 157 on muscle healing impaired by systemic corticosteroid application. Medical Science Monitor (2010). PMID 20190676

[2] Growth hormone receptor expression. In cell-culture research on rat tendon fibroblasts, pentadecapeptide BPC 157 was reported to upregulate growth hormone receptor expression, a pathway the study links to fibroblast proliferation.

Pentadecapeptide BPC 157 enhances the growth hormone receptor expression in tendon fibroblasts. Molecules (2014). PMID 25415472

View BPC-157 specifications and COA

Choosing between them for a study

For work on damaged or impaired-healing muscle tissue, the BPC-157 literature is the deepest indexed here. Note that these records measure receptor expression or tissue-level markers, not muscle mass, so match the compound to the endpoint you can actually measure.

Frequently asked questions

Do any of these build muscle?

That is not a question the published literature answers, and it is not a claim we make. The research indexed here measures things like receptor expression and healing of injured tissue in animal models. None of it establishes that any of these compounds increases muscle mass in a person, and none of these compounds is approved for human use.

Why is MK-677 or a SARM not on this list?

We no longer supply oral compounds or SARMs, so they are excluded from this index. This page only covers compounds whose certificate of analysis we publish and can be independently verified.

What does the evidence level mean?

It describes how much published peer-reviewed literature exists for that compound in this research area — nothing more. A compound labelled "Extensive literature" simply has more studies available to read, including inconclusive and negative ones. It is not a ranking of effect.

This page summarises published laboratory research for reference. It is not medical guidance and makes no human safety, dosing, or efficacy claim. All referenced compounds are for research purposes only. Inclusion in this reference does not establish current catalogue availability.