What is in a peptide stack, and what the research covers
A stack is several separate vials bought together, not a mixed product. What each of ours contains, and why the literature belongs to the components.
A stack is a group of separate vials purchased together, not a single mixed product. Each vial holds one compound with its own CAS number, molecular weight and Certificate of Analysis. The published literature belongs to the individual compounds, studied separately — there is no research on a stack as a stack.
By the Bench Grade Research Team ·
A stack is a purchase, a blend is a product
The distinction matters and is easy to blur. A blend is several peptides in one vial, sharing a reconstitution and lacking a CAS number of its own. A stack is several vials bought together, each independently manufactured, tested and documented. Everything that makes a single-compound COA readable still applies to each vial in a stack.
Practically, that means a stack should arrive with one Certificate of Analysis per vial, each naming its own lot. A single document covering the group is not the same thing and is worth querying.
What each stack contains
| Stack | Compounds |
|---|---|
| Repair | BPC-157, TB-500 |
| Bronze | Melanotan-2, GHK-Cu |
| Apex | CJC-1295 (no DAC), Ipamorelin |
| Vitality | Tesamorelin, NAD+ |
| GHRH Pair | CJC-1295 (no DAC), Tesamorelin |
| Metabolic + Copper-Tripeptide | GLP-3 R, Tesamorelin, GHK-Cu |
Component counts run from two to four vials. Because each vial is a separate product, the per-compound reference material on this site applies directly to each one — identity data, storage behaviour and reconstitution arithmetic are all per compound, not per stack.
Where the literature actually sits
There is no published research on these groupings as groupings. What exists is research on each compound individually, largely in animal and in-vitro models, and that work does not combine or transfer by virtue of two vials being shipped in the same box. The studies linked below are the primary sources for the components, and no clinical approval exists for these compounds.
Verifying a stack
- One COA per vial, each naming its own lot number.
- Purity and mass confirmation per compound, since each is a separate product.
- Storage requirements checked per compound — a copper complex and a methionine-containing peptide do not want identical handling.
- Reconstitution planned per vial, since each has its own molecular weight and its own solubility behaviour.
References
Primary literature for the compounds discussed above. Links open the record on PubMed.
- The potential of GHK as an anti-aging peptide Pickart L, et al. Aging Pathobiol Ther. 2022. PMID 35083444 → · summary
- Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data Pickart L, et al. Int J Mol Sci. 2018. PMID 29986520 → · summary
- BPC 157 and Standard Angiogenic Growth Factors. Gastrointestinal Tract Healing, Lessons from Tendon, Ligament, Muscle and Bone Healing Sikiric P, et al. Curr Pharm Des. 2018. PMID 29998800 → · summary
- The promoting effect of pentadecapeptide BPC 157 on tendon healing involves tendon outgrowth, cell survival, and cell migration Chang CH, et al. J Appl Physiol. 2011. PMID 21030672 → · summary
- Pulsatile secretion of growth hormone (GH) persists during continuous stimulation by CJC-1295, a long-acting GH-releasing hormone analog Ionescu M, et al. J Clin Endocrinol Metab. 2006. PMID 17018654 → · summary
- Prolonged stimulation of growth hormone (GH) and insulin-like growth factor I secretion by CJC-1295, a long-acting analog of GH-releasing hormone, in healthy adults Teichman SL, et al. J Clin Endocrinol Metab. 2006. PMID 16352683 → · summary
- Thymosin beta 4 improves dermal burn wound healing via downregulation of receptor of advanced glycation end products in db/db mice Xu TJ, et al. Biochim Biophys Acta. 2014. PMID 25230158 → · summary
- Pentadecapeptide BPC 157 (PL 14736) improves ligament healing in the rat Cerovecki T, et al. J Orthop Res. 2010. PMID 20225319 → · summary
Primary sources
- The potential of GHK as an anti-aging peptideAging Pathobiol Ther · 2022
- Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene DataInt J Mol Sci · 2018
- BPC 157 and Standard Angiogenic Growth Factors. Gastrointestinal Tract Healing, Lessons from Tendon, Ligament, Muscle and Bone HealingCurr Pharm Des · 2018
- The promoting effect of pentadecapeptide BPC 157 on tendon healing involves tendon outgrowth, cell survival, and cell migrationJ Appl Physiol · 2011
- Pulsatile secretion of growth hormone (GH) persists during continuous stimulation by CJC-1295, a long-acting GH-releasing hormone analogJ Clin Endocrinol Metab · 2006
- Prolonged stimulation of growth hormone (GH) and insulin-like growth factor I secretion by CJC-1295, a long-acting analog of GH-releasing hormone, in healthy adultsJ Clin Endocrinol Metab · 2006
Frequently asked questions
- What is the difference between a peptide stack and a blend?
- A blend is several peptides in one vial, sharing a reconstitution and having no CAS number of its own. A stack is several separate vials bought together, each independently manufactured, tested and documented with its own COA.
- Is there research on peptide stacks?
- Not on the stack as a stack. The published work covers each compound individually, largely in animal and in-vitro models. Shipping two vials together does not combine or transfer what was studied about either compound.
- Should a stack come with one COA or several?
- Several — one per vial, each naming its own lot number. Each vial is a separate product with its own manufacture and testing, so a single document covering the whole group is not equivalent and is worth querying.
Compounds discussed in this guide
More on quality control
- Cloudy, clumped or undissolved — diagnosing a failed reconstitutionFour appearances, four different causes. What a hazy vial, a gel, floating strands or a stubborn cake each tell you about the material and the technique.
- What the published safety record actually saysReported adverse effects, and the much more important fact of how little controlled human data exists behind them. What is documented, what is self-reported, and what has never been studied.
- A Certificate of Analysis in your name — what it coversA re-issued COA changes whose letterhead the data appears on. It does not change the data, the lot, or who performed the analysis — and claiming otherwise is where operators get into trouble.
All products discussed in this guide are supplied by Bench Grade Peptides for laboratory research use only. Not for human or veterinary use.