Description
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.






