Muscle Growth
A secretagogue and recombinant GH pen, paired for growth research.
A growth-hormone-releasing factor analogue in a 20 mg pen, studied for visceral-fat research.
Recombinant growth hormone, 100 IU per click pen, for growth and recovery research.
Part of our Growth & Recovery.
related stacksbundle & save
Advanced Growth Stack
Nightly secretagogue pulses layered with recombinant GH.
CJC-1295 + Ipamorelin 20
Somatropin 100
Overview
Before sourcing muscle growth peptides for in-vitro research, check these five points:
- Bundle identity: confirm the exact pen names, quantities and formulations listed on the current catalogue page
- Batch documentation: request the certificate of analysis (CoA) for the specific lot number before accepting delivery
- Mechanism: each pen addresses a distinct point in the growth axis; the tesamorelin pen stimulates pituitary GH release and the somatropin pen supplies recombinant GH directly
- Storage: both pens ship cold within 24 hours; keep them at the stated storage temperature on receipt
- Price and availability: take the live GBP price and stock status from the current offer block at checkout
Veyvora’s Muscle Growth bundle is a two-pen stack comprising Tesamorelin 20 and Somatropin 100, listed as a bundle & save offer with a stated 12% saving on the Veyvora growth-category page as of 30 August 2026 [3]. The bundle is described as “a secretagogue and recombinant GH pen, paired for growth research” and is supplied for in-vitro laboratory research [1].
This page covers: (1) exactly what the bundle contains and how each pen is specified; (2) what each compound is studied for; and (3) what batch documentation and handling apply.
Check the live bundle price and stock now, go directly to the Muscle Growth stack offer block on the Veyvora product page.
| Detail | Value (as of 30 August 2026) |
|---|---|
| Bundle name | Muscle Growth Stack |
| Components | Tesamorelin 20 + Somatropin 100 |
| Format | Two × 3 mL multi-dose research pens |
| Stated saving | 12% versus individual pen prices |
| Live GBP price | See current offer block at checkout [3] |
| Stock status | See current offer block at checkout [3] |
| Intended use | In-vitro laboratory research only |
The GBP bundle price and live stock count are shown in the live checkout at the time of order [3].
Key Takeaways
- The Muscle Growth Stack pairs Tesamorelin 20 (a GHRH-analogue secretagogue) with Somatropin 100 (recombinant human GH), each supplied as a 3 mL, 300-click multi-dose research pen.
- The two compounds address distinct mechanistic roles: Tesamorelin stimulates pituitary GH release; Somatropin delivers the recombinant-GH signal directly, bypassing pituitary mediation.
- Published literature covers each compound in its own body of work: the GHRH-analogue secretagogue literature for tesamorelin and the recombinant-GH literature for somatropin.
- Both pens carry separate batch CoAs available on request against the individual batch number.
- Confirm live GBP price and stock status at checkout before ordering.
Exact Bundle Identity
Confirm these details against the live product page before sourcing:
- Exact bundle name: Muscle Growth Stack (listed under Veyvora’s growth category as of 30 August 2026) [3]
- Component one: Tesamorelin 20, a growth-hormone-releasing-hormone (GHRH) analogue pen, 20 mg per unit, 67 µg per click [1]
- Component two: Somatropin 100, recombinant human growth hormone (GH), 100 IU per unit, 0.33 IU per click [2]
- Format: Two × 3 mL, 300-click multi-dose research pens, each supplied with 10 × 31G · 6 mm pen needles and a dosing card [1][2]
- Stated saving: 12% versus individual pen prices, shown as a bundle & save offer on the growth-category page [3]
- Live GBP price and stock: take both figures from the current offer block at checkout [3]
Veyvora describes the Muscle Growth Stack as “a secretagogue and recombinant GH pen, paired for growth research,” supplied for in-vitro laboratory research [1][3]. Once an order arrives, verify your batch against its CoA by matching the lot number on the pen to the published certificate before any laboratory use.
Included Components
The Muscle Growth Research Stack contains two pens: Tesamorelin 20 (a GHRH analogue) and Somatropin 100 (recombinant human GH), each addressing a distinct point in the growth axis [1][2].
| Attribute | Tesamorelin 20 | Somatropin 100 |
|---|---|---|
| Compound class | GHRH analogue (secretagogue) | Recombinant human GH |
| Strength per unit | 20 mg | 100 IU |
| Dose per click | 67 µg | 0.33 IU |
| Format | 1 × 3 mL, 300-click multi-dose pen | 1 × 3 mL, 300-click multi-dose pen |
| Needles supplied | 10 × 31G · 6 mm pen needles | 10 × 31G · 6 mm pen needles |
| Dosing card | Included | Included |
| CoA | Available on request against batch number | Available on request against batch number |
| Product page | Tesamorelin 20 | Confirm via live catalogue [2] |
All values above are drawn from Veyvora’s component pages as of 30 August 2026 [1][2]. Confirm any attribute not shown in the table, including current GBP unit price and live stock count, against the current offer block before ordering.
Tesamorelin acts at the secretagogue level by stimulating the pituitary to release endogenous GH, whereas Somatropin delivers the recombinant-GH signal directly without requiring pituitary mediation. That mechanistic distinction matters when designing a growth-axis protocol. Researchers evaluating the secretagogue component against single-compound alternatives may find the CJC-1295 versus Ipamorelin comparison useful before finalising their protocol. For post-receipt handling, consult Veyvora’s storage and stability guidance to maintain material integrity at the stated storage temperature.
State of the Evidence
Published mechanistic literature covers Tesamorelin and Somatropin each in its own body of work [1][2]. Tesamorelin is studied as a GHRH analogue in the secretagogue literature, where the question is how the pituitary responds to the releasing signal; Somatropin is studied as recombinant human GH, where the question is what the hormone itself does downstream. The bundle brings the two together so that a laboratory can study both points in the growth axis side by side, each against its own evidence base.
Veyvora’s product documentation describes the pairing as “a secretagogue and recombinant GH pen, paired for growth research,” a formulation rationale for the research theme [1][3].
What that map means for protocol design:
- Tesamorelin 20 is a GHRH-analogue research pen; the published mechanistic literature covers the secretagogue class [1].
- Somatropin 100 is a recombinant-GH research pen, with its own compound-level literature [2].
- Veyvora supplies both compounds for in-vitro laboratory research [1][3].
- Each pen carries its own batch CoA, available on request against the individual batch number [1][2].
Laboratories whose protocol calls for a different growth-axis format can compare alternatives across the Growth & Recovery Research Pens catalogue. Those whose work concerns repair rather than growth-focused research can consult the repair and recovery research pens category before choosing this stack.
Batch Documents and Handling
Every pen in the Muscle Growth Research Stack ships with a batch-specific CoA available on request against the individual batch number [1][2]. The CoA travels with the batch rather than being published as a downloadable file on the catalogue pages (reviewed 30 August 2026); request the specific lot document for the batch contents [1].
Certificate of Analysis
Each pen carries its own CoA rather than a shared bundle document. To confirm compound identity, purity, and endotoxin status before laboratory use, verify your batch against its CoA using the batch number printed on the pen.
Cold-Chain Dispatch
Veyvora states that both Tesamorelin 20 and Somatropin 100 ship cold within 24 hours of order confirmation [1][2]. Confirm the packaging specification and carrier with Veyvora directly before committing to a time-sensitive protocol.
Researchers whose work requires a different storage or stability profile can review the MOTS-c and SS-31 comparison for an alternative research domain with separately documented handling requirements.
Commercial Terms
The Muscle Growth Research Stack is listed as a bundle-and-save offer with a stated saving of 12% against the combined individual-pen prices [1][3]. The GBP bundle price, stock count and per-order delivery fee are live figures; see the live product page and confirm them at checkout before committing to a purchase [1][3].
What Is Confirmed
- Bundle saving: 12% off the combined component price, as stated on the Veyvora stacks page [3]
- Dispatch: both pens stated to ship cold within 24 hours of order confirmation [1][3]
- Currency display: Veyvora states prices are shown in the user’s selected currency; GBP display is available and the bundle figure is on the live page [1]
For how the purity figure on the CoA is measured and reported, review what HPLC purity does and does not prove before finalising an order. Cold-chain requirements after delivery are covered in the storage and stability guidance.
Research Use
Veyvora supplies both pens in the Muscle Growth Research Stack for in-vitro and laboratory research, such as growth-hormone-axis signalling assays and cell-based bioactivity work, with each pen also usable as an analytical reference material [1][3]. Not for human or veterinary use. Somatropin is also the active substance of registered prescription-only growth-hormone medicines; the research pen is a separate, unregistered laboratory presentation.
The batch documents report assay purity, identity and endotoxin status for the supplied lot [1][4]; read them before the pens enter a protocol.
Researchers evaluating the secretagogue component in isolation, or considering a single-compound alternative, can review the CJC-1295 versus Ipamorelin comparison before finalising a procurement decision. The Growth & Recovery Research Pens catalogue lists current options with their component specifications for those comparing the Muscle Growth stack against other verified formats in the same category [3].
To confirm the live bundle price, current stock, and batch CoA availability for your specific order, go directly to the Muscle Growth stack offer block on the Veyvora product page now.
Sources
[1] Tesamorelin 20 mg Pen | Veyvora, veyvora.com, https://veyvora.com/peptides/tesamorelin-20 [2] Somatropin 100 IU Pen | Veyvora, veyvora.com, https://veyvora.com/peptides/somatropin-100 [3] Growth & Recovery Research Pens | Veyvora, veyvora.com, https://veyvora.com/categories/growth [4] How to read a CoA | Veyvora, veyvora.com, https://veyvora.com/testing/how-to-read-a-coa
