Pen Peptide
Recomposition Stack | Andarine S4, GW501516 & SR9009 - 240mg/3ml
Recomposition Stack | Andarine S4, GW501516 & SR9009 - 240mg/3ml
Pre-Mixed Stabilized Pen
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- 🥇 The first peptide brand with Pre-Mixed Pen stabilized formulations
- 📦 We ship with DHL Express in thermo-insulated packaging
- 💳 Secure payment by card or bank transfer
- 🧪 Purity ≥98% for precise research protocols
✅ Proper storage
✅ Proper storage
To ensure the optimal quality of our products, we pay special attention to the delivery and storage of peptides. All our shipments are sent in special cooling boxes that maintain the required temperature during transportation. This guarantees that the products will reach you in perfect condition.
After receiving the peptides, it is important to store them properly to preserve their stability and effectiveness. We recommend storing them at a temperature between 2°C and 8°C in a refrigerator. This ensures that the peptides retain their properties throughout their shelf life.
✅ Order and Delivery
✅ Order and Delivery
At Pen Peptide, we ensure fast and secure delivery of your order with DHL Express, maintaining the highest quality and reliability throughout the process.
How we process your order:
Once your payment is confirmed via bank transfer or debit/credit card, we dispatch your order on the next business day.
Orders are carefully packaged in temperature-controlled cooling boxes to ensure product integrity during transportation.
Delivery timeframe:
Standard delivery time within the Europe & UK: 1 to 3 business days (typically 1-2 business days for most locations).
Deliveries are handled exclusively by DHL Express, providing a fast and reliable shipping experience.
Tracking & order confirmation:
After your payment has been successfully processed, you will receive an email confirmation with your tracking number.
You can use the provided tracking link to monitor your shipment’s progress and estimated delivery time.
With Pen Peptide, you can trust that your order will arrive quickly and in perfect condition, ensuring a seamless and efficient experience.
✅ How does the pen work?
✅ How does the pen work?
The peptide pen is an innovative and easy-to-use device, designed for precise dosing of the substance in research settings. It is a pre-mixed pen (Pre-Mixed Pen), which means it contains an already dissolved peptide in an optimal concentration, ready for use.
Key features of the pen:
- Precision – Each pen is pre-dosed, ensuring accurate and consistent application.
- Ease of Use – No dilution or additional preparation is required.
- Sterility and Safety – Each product is manufactured in controlled laboratory conditions and sterile-packaged to guarantee its purity and effectiveness.
How to use the pen?
- Attach the needle by placing it onto the pen and twisting until fully secured.
- Set the desired dose – use the dosage dial by rotating the regulator to the corresponding number, which represents the selected units. The numbers displayed range from 0 to 60, indicating the units for dosing.
- Administer the dose according to the requirements of your research.
- Store the pen properly – in a refrigerator at a temperature between 2°C and 8°C to maintain the stability of the peptide.
With the pre-mixed pen from Pen Peptide, the process is simplified, efficient, and safe, ensuring optimal results for your research.
✅ Why choose Pen Peptide?
✅ Why choose Pen Peptide?
If you are looking for peptides of the highest quality with over 98% purity, Pen Peptide is one of the best places where you can easily and securely order online. At Pen Peptide, we specialize in the synthesis of highly purified peptides intended exclusively for Research & Development Use Only.
Our peptides are produced in certified GMP laboratories, adhering to strict standards of quality, safety, and control. Each product undergoes rigorous testing for purity and stability to ensure you receive research materials with verified origin and maximum effectiveness.
We understand how important fast and reliable service is for our customers. That’s why we offer express delivery within 1 to 3 business days. All shipments are securely packaged to maintain product quality during transportation.
✅ Molecular Structure Stabilization Process Technology (MSSPT)
✅ Molecular Structure Stabilization Process Technology (MSSPT)
The Molecular Structure Stabilization Process Technology (MSSPT) focuses on preserving the structural integrity and functionality of molecules under harsh conditions and during prolonged storage periods. This process may involve modification of the molecule itself, optimization of storage conditions, or the use of auxiliary components that protect the molecules from degradation.

Key stages of the process:
1. Molecular modification:
Chemical and genetic engineering: Involves altering the structure or composition of the molecule to make it more resistant to degradation. For example, protein cross-linking can prevent unfolding, or modification can reduce susceptibility to chemical reactions.
Chemical modification: The introduction of protective groups or changes to reactive sites can prevent unwanted chemical reactions and degradation.
2. Optimization of storage conditions:
Lyophilization (freeze-drying): This method removes water from the sample, helping to preserve structure and prevent degradation during storage.
Storage in specialized containers: Using containers that protect from light and oxygen can safeguard molecules from photodegradation or oxidation.
Controlled-release systems: These systems provide a steady concentration of the therapeutic molecule, but introduce additional challenges related to stabilizing molecules over extended release periods.
3. Use of auxiliary components:
Buffers: Buffers help maintain stable pH levels, which are crucial for many chemical reactions and biological processes.
Antioxidants: These additives can prevent or reduce oxidative degradation, which is a common cause of molecular instability.
Stabilizing agents: These help prevent aggregation, precipitation, or other forms of degradation.
4. Understanding molecular interactions:
Thermodynamic equilibrium: A fundamental understanding of the interactions between a molecule and its environment is essential for developing effective stabilization strategies.
Detergents for membrane proteins: Specialized detergents, such as those developed to stabilize membrane proteins, help maintain their structure in solution.
Molecular simulations: Techniques such as molecular dynamics can provide valuable insights into the stability and behavior of molecules.
5. Examples of stabilization techniques:
Protein stabilization: Strategies include forming disulfide bonds, using stabilizing agents or chaperones, and introducing stabilizing mutations.
Polymer stabilization: Methods include the addition of antioxidants or the use of modified clay minerals that prevent polymer degradation.
Propellant stabilization: Stabilizers are essential to prevent the decomposition of propellants and ensure their safe and reliable performance.
Pen Peptide – Proven Molecular Stabilization
Our peptide pens are developed with a strong focus on preserving the biological activity and structural stability of the active compounds. Thanks to thoroughly researched stabilization processes—including optimization of storage environments and precise modification of molecular structure—we achieve long-term durability and reliability of the peptides under appropriate storage conditions.
The MSSPT (Molecule Structure Stabilization Process Technology) we use incorporates various approaches to maintain molecular integrity, including the use of suitable buffers, antioxidants, and stabilizing agents. The MSSPT technology allows for the integration of multiple active molecules into a compact volume without compromising their structural integrity or biological effectiveness. Additional optimization of storage conditions—such as pH control and prevention of photodegradation and oxidation—ensures maximum stability and bioactivity of the peptides.
These precise measures guarantee that the final product remains effective and stable even after extended storage periods, making it a secure and reliable option for use in various research protocols.
Pen Content: Andarine S4 – 80mg, GW501516 – 80mg, SR9009 – 80mg
What is the Recomposition Stack?
Recomposition Stack is an innovative formula developed for scientific research focused on body recomposition—the simultaneous development of lean muscle mass and reduction of body fat. The combination includes three synergistic compounds: Andarine S4, GW501516 (Cardarine), and SR9009 (Stenabolic), each with well-studied metabolic and functional mechanisms.
The pen contains a total of 240mg of active ingredients in 3ml, with a pre-mixed and stabilized formula for subcutaneous use in scientific settings. This ensures high bioavailability and precise dosing.
Key Components and Mechanism of Action:
Andarine (S4) is a selective androgen receptor modulator (SARM) that shows strong receptor activity in muscle and bone tissue. It is used in research protocols aimed at improving muscle density and strength, particularly under caloric deficit conditions.
GW501516 (Cardarine) is a PPAR-δ agonist that modulates fatty acid metabolism, enhances mitochondrial efficiency, and supports fat oxidation as a primary energy source. It is suitable for studies focused on endurance, glucose control, and lipid balance, without interacting with the androgen system.
SR9009 (Stenabolic) is a REV-ERBα agonist that regulates circadian rhythms and cellular energy homeostasis. It is known for its ability to increase mitochondrial density, stimulate resting energy expenditure, and optimize cellular metabolism. It is often used in synergy with Cardarine in research protocols aiming to improve metabolic efficiency.
Synergistic Effect of the Recomposition Stack:
The combination of Andarine S4, GW501516, and SR9009 creates a potent yet balanced effect suitable for research protocols involving fat loss, muscle preservation, and enhancement of physical performance.
Andarine contributes to anabolic stability, while Cardarine and SR9009 work synergistically to improve mitochondrial function, energy utilization, and endurance.
This type of composition is particularly suitable for protocols involving caloric restriction, intense physical activity, or periods of metabolic adaptation where the goal is to simultaneously achieve muscle definition, functional strength, and a better metabolic profile.
Scientifically Supported Potential Benefits:
Recomposition Stack is formulated to address both anabolic stability and metabolic optimization in short- to mid-term research cycles.
- Supports muscle tissue preservation during caloric deficits
- Stimulates fatty acid oxidation and improves lipid balance
- Enhances mitochondrial efficiency and energy production
- Aids in increasing endurance and workload capacity
- Maintains muscle definition and dryness without water retention
- Suitable for research protocols focused on body recomposition and metabolic regulation
Dosage and Use in Research Protocols:
Recommended research protocol: 10 units once daily, for a duration of 4–8 weeks, followed by a rest period of 3–5 weeks.
Total pen content: 300 units
Maintaining optimal dosage and monitoring application duration play a crucial role in limiting the manifestation of side effects.
Possible Side Effects:
Currently, there is insufficient published clinical data regarding long-term usage profiles. In laboratory settings, tolerability is generally good, but as with any compound administered subcutaneously, individual reactions cannot be excluded.
Potential local effects related to the application method may include redness, sensitivity, discomfort, or mild swelling at the injection site. In longer cycles and higher doses, some models have explored possible effects on endogenous hormonal regulation, which may vary depending on dosage, duration, and individual sensitivity.
Strict monitoring of both dosage and duration is recommended for all research protocols.
For laboratory purposes and personal observation only.
For laboratory purposes and personal observation only.
The information has been collected from numerous studies and analyses conducted over the years and is not intended for diagnosing, treating, or preventing any diseases.
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