Skip to product information
1 of 1

Pen Peptide

Building Up Stack | YK-11, RAD-140, MK-677, SLU-PP-332, Cardarine – 320.8mg/3ml

Building Up Stack | YK-11, RAD-140, MK-677, SLU-PP-332, Cardarine – 320.8mg/3ml

Pre-Mixed Stabilized Pen

Regular price £152.00
Regular price Sale price £152.00
Sale Temporarily out of stock
Delivery in the Europe & UK within 1-3 days with DHL Express. Shipping calculated at checkout.
  • 🥇 The first peptide brand with Pre-Mixed Pen stabilized formulations
  • 📦 We ship with DHL Express in thermo-insulated packaging
  • 💳 Secure payment by bank transfer
  • 🧪 Purity ≥98% for precise research protocols
Stabilized formula ℹ️ The formula retains its structural integrity and bioactivity, without risk of degradation or loss of stability, even in case of temporary temperature increase above 8°C during transport. – tolerant to short-term temperature deviations above 8°C

✅ 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

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.

✅ 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)

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.

MSSPT

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.

Content in pen: YK-11 – 80mg, RAD-140 – 80mg, MK-677 – 80mg, SLU-PP-332 – 800mcg, Cardarine – 80mg

What is Building Up Stack?

Building Up Stack is a comprehensive synergistic formula, designed for research protocols aiming at maximum muscle growth, improved hormonal profile, endurance, and metabolic efficiency. The combination includes two powerful SARMs (YK-11 and RAD-140), one GHS stimulator (MK-677), as well as two molecules with pronounced metabolic and mitochondrial activity – SLU-PP-332 and Cardarine (GW501516).

The formula contains a total of 320.8mg of active ingredients in 3ml of stabilized liquid form for subcutaneous administration, ensuring precise dosing and high bioavailability under laboratory conditions.

Main components and mechanism of action:

YK-11 is a unique SARM, structurally based on DHT, with potential for myostatin inhibition through increased follistatin, making it suitable for research aimed at extreme muscle hypertrophy.

RAD-140 (Testolone) is a selective androgen receptor modulator that demonstrates high anabolic activity with low androgenic risk, studied for its ability to increase strength, density, and recovery capacity.

MK-677 (Ibutamoren) is a ghrelin receptor agonist that stimulates GH and IGF-1 secretion, supporting recovery, sleep, and cellular regeneration – particularly valuable in protocols for long-term lean mass building.

Cardarine (GW501516) activates PPAR-δ receptors and has been studied for stimulating fat oxidation, improving glucose balance, and enhancing endurance, without interaction with the androgen system.

SLU-PP-332 is an experimental PGC-1α modulator involved in mitochondrial biogenesis and cellular energy regulation, improving the oxidative capacity of muscle fibers and energy utilization.

Synergistic effect of Building Up Stack:

The combination of YK-11 and RAD-140 provides strong receptor activation with a targeted anabolic response, while MK-677 supports endogenous recovery and hormonal homeostasis. Cardarine and SLU-PP-332, on the other hand, enhance mitochondrial function and energy metabolism, contributing to increased physical performance and optimization of energy capacity.

The formula is designed for research protocols targeting complete body transformation – including muscle growth, structural density, endurance, and regeneration – without inducing hormonal suppression or androgen dominance.

Potential scientifically supported benefits:

Building Up Stack combines anabolic activation, hormonal support, and metabolic efficiency, created for advanced research protocols.

  • Supports intense muscle mass and strength building
  • Stimulates GH and IGF-1 secretion without suppression of the androgen axis
  • Improves mitochondrial efficiency and fat oxidation
  • Enhances regenerative capacity by supporting sleep and recovery processes
  • Maintains visual definition and functional endurance
  • Suitable for integrated protocols focused on strength, mass, and metabolic adaptation

Dosage and application in research protocols:

Recommended research scheme: 10 units once daily, for 4–8 weeks, followed by a 3–5 week off-period.

Total content in pen: 300 units

Adhering to optimal dosage and controlling the duration of application play a key role in limiting the occurrence of side effects.

Possible side effects:

Currently, there is insufficient published clinical data regarding the long-term use profile. Under laboratory conditions, tolerance is generally good, but as with any compound administered subcutaneously, individual reactions cannot be excluded.

Possible local manifestations associated with the method of administration may include redness, sensitivity, discomfort, or mild swelling at the injection site. In prolonged cycles and high doses, some models investigate effects on endogenous hormonal regulation, which depend on dosage, duration, and individual sensitivity.

Strict monitoring of dosage and duration of each research protocol is recommended.

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.

View full details