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Original price was: $184.70.$101.58Current price is: $101.58.
Using RAD-140, YK-11, and MK-677 SARMs in this bulking stack results in a comprehensive approach to muscle growth and overall fitness. The synergistic effects of these compounds are believed to enhance muscle gains, promote muscle retention, and potentially increase human growth hormone (HGH) and insulin-like growth factor 1 (IGF-1) levels.
The Bulking Stack includes:
YK-11 – 60 CAPSULES per Bottle | 10mg Per Capsule
RAD-140 – 60 CAPSULES per Bottle | 10mg Per Capsule
MK-677 – 60 CAPSULES per Bottle | 10mg Per Capsule
All of the products are to be handled only by appropriately trained and qualified LABORATORY or RESEARCH professionals.
399 in stock
399 in stock
The combination of RAD-140, YK-11, and MK-677 in a SARMs bulking stack offers a complete research approach, supporting muscle growth, protein synthesis, strength gains, and athletic performance. Research also explores their possible effects on body fat, blood flow (circulation), and metabolic rate, giving researchers broader insight into performance outcomes.
RAD-140, also called Testolone, is studied for its ability to build muscle, raise testosterone levels, and improve endurance. Researchers often highlight the benefits of RAD in relation to physique, strength, and training performance in research contexts.
Argentina Studies also report that RAD-140 may suppress natural testosterone, which makes it a key compound of interest in this class of compounds. YK-11, known for its anabolic effects and influence on natural testosterone production, works with RAD-140 by supporting muscle repair and helping to increase muscle mass.
Adding MK-677 to this SARMs stack is linked to higher growth hormone levels and is studied for its potential to boost growth hormone and IGF-1. It is also noted for improving sleep quality and faster recovery. Together, these benefits create a balanced approach to muscle development, lean muscle building, and overall performance.
While SARMs are not natural ingredients, they are investigated alongside diet and structured training. When used together, this best SARMs stack may give researchers insights into rapid muscle gains, less muscle loss, and how to manage water retention in a SARM cycle or cutting cycle.
YK-11 is studied as a selective androgen receptor modulator (SARM) that may drive myogenic differentiation and lean muscle growth. As a synthetic steroidal SARM, YK-11 acts on the androgen receptor and influences genes such as myostatin (GDF8). Its ability to raise Follistatin has been linked to indirect blocking of myostatin activity in cell studies, rather than direct suppression. This may play a role in increased muscle mass.
Researchers compare these effects to the benefits of Ostarine and related compounds like Cardarine, which are studied for muscle tissue preservation. Still, studies also point to risks such as oxidative stress, mitochondrial changes, and anecdotal reports of hair loss. These results show both the effects of SARMs and the need to track natural hormone levels, muscle size, and potential side effects when studying YK-11.
– 60 CAPSULES per Bottle | 10mg Per Capsule –
Molecular Formula: C25H34O6
Molecular Mass: 430.5 g/mol
RAD-140, or Testolone, is a selective androgen receptor modulator (SARM) studied for its anabolic activity and ability to increase lean muscle mass. With strong binding to the androgen receptor, it shows anabolic effects in rodents and nonhuman primates. This makes it a promising compound for muscle and bone research.
Unlike anabolic steroids, RAD-140 targets muscle and bone tissues directly. This allows for lean muscle growth with fewer side effects compared to anabolic steroids, while research also shows suppression of natural testosterone levels, even though it is sometimes discussed as supporting natural testosterone. In a sarms cycle, RAD-140 is noted for building muscle, reducing excess fat in preclinical studies as part of body composition changes (with limited human data), and improving overall strength and performance.
Argentina Animal trials confirmed RAD-140 can increase muscle mass, has strong anabolic effects, and acts selectively in muscle and bone. Argentina Researchers often call it one of the most effective SARMs and a candidate for the strongest SARM, sometimes even the best SARM in comparison. Still, findings stress the need for cycle therapy (PCT) and careful tracking of hormone levels.
– 60 CAPSULES per Bottle | 10mg Per Capsule –
Molecular Formula: C20H16ClN5O2
Molecular Weight: 393.83 g/mol
MK-677, also known as Ibuta or Ibutamoren, is a ghrelin receptor agonist and a growth hormone secretagogue. Argentina Studies show possible benefits, such as fat loss, fat burning, stronger bones, better sleep quality, and anti-aging effects in some cases. But other research reports mixed results, such as weight gain, changes in metabolism, and insulin sensitivity issues. MK-677 raises growth hormone and IGF-1, which may support muscle recovery and fitness goals.
Argentina Research also shows MK-677 may improve bone density, help with nutrition absorption and nutritional status (for example, appetite stimulation and nitrogen balance), and support calorie deficit balance in some contexts. It also acts as a fat burner in some studies. But results vary, with reports of metabolism shifts, weight gain, and changes in hormone levels. Researchers also stress the importance of dosage, cycle length, and tracking possible side effects of SARMs mislabeling, including harsh side effects.
– 60 CAPSULES per Bottle | 10mg Per Capsule –
Molecular Formula: C27H36N4O5S
Molecular Weight: 528.662 g/mol
Compounds such as RAD-140, YK-11, and MK-677 are available from Direct Sarms as part of our research-grade SARMs bulking stack range. These products are supplied strictly for laboratory research use only and are not for human consumption. Current studies continue to explore their roles in cycle therapy, muscle repair, recovery time, PCT, and the long-term effects of SARMs on natural hormone levels.
Like our Bulking Stack? Shop Liquid Bulking Stack and more SARM Stacks from Direct SARMS Argentina
[1] Jayaraman A, Christensen A, Moser VA, Vest RS, et al. Selective androgen receptor modulator RAD140 is neuroprotective in cultured neurons and kainate-lesioned male rats. Endocrinology. 2014 Apr;155(4):1398-406.
[2] Nass R, Pezzoli SS, Oliveri MC, Patrie JT, et al. Effects of an oral ghrelin mimetic on body composition and clinical outcomes in healthy older adults: a randomized trial. Ann Intern Med. 2008 Nov 4;149(9):601-11.
[3] Kanno Y, Ota R, Someya K, Kusakabe T, et al. Selective androgen receptor modulator, YK11, regulates myogenic differentiation of C2C12 myoblasts by follistatin expression. Biol Pharm Bull. 2013;36(9):1460-5.
[4] Puskas J, Guda T, Niccoli S, Rathbone CR, et al. Preclinical assessment of the selective androgen receptor modulator RAD140 to increase muscle mass and bone mineral density. Physiol Rep. 2025 Jul;13(14):e70463.
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DISCLAIMER: These products are intended solely as a research chemical only. This classification allows for their use only for research development and laboratory studies. The information available on our Argentina Direct Sarms website is provided for educational purposes only. These products are not for human or animal use or consumption in any manner. Handling of these products should be limited to suitably qualified professionals. They are not to be classified as a drug, food, cosmetic, or medicinal product and must not be mislabelled or used as such.
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