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Bulking Stack


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.

459 in stock

459 in stock

First time customer gets 15% discount code = 1storder

SARMs Capsules Bulking Stack

The combination of RAD-140, YK-11, and MK-677 in a bulking stack offers a comprehensive approach to achieving muscle growth, strength enhancement, and overall performance improvement. RAD-140, also known as Testolone, is recognized for its potential to build muscle, boost strength, and enhance endurance, making it a key component in the stack. YK-11, reputed for its anabolic properties and testosterone-boosting effects, complements RAD-140 by promoting further anabolic activity and potentially contributing to increased muscle mass.

Furthermore, the inclusion of MK-677 in this sarms stack is known for its ability to enhance muscle growth and improve sleep quality, adds to the synergistic benefits of the bulking stack, potentially offering a holistic approach to supporting muscle development and overall physical performance. When used in conjunction, this SARMs Stack may form a powerful combination in a bulking stack to support individuals aiming for significant gains in muscle mass and strength.

YK11 Capsules

YK-11 has garnered attention from scientists as a selective androgen receptor modulator (SARM) known for its potential to induce myogenic differentiation and promote rapid muscle growth. Functioning as a synthetic steroidal SARM, YK-11 is recognized for its gene-selective partial agonist activity on the androgen receptor, influencing specific genes such as myostatin (GDF8).

This compound’s ability to increase Follistatin expression indirectly inhibits myostatin, potentially contributing to further development of lean muscle mass. However, studies have also indicated that YK-11 may induce oxidative stress and mitochondrial dysfunction, highlighting the multifaceted nature of its physiological effects. Users have reported improvements in muscle strength and size within a few weeks of starting a cycle, positioning YK-11 as a compelling compound for those seeking enhancements in physical performance and muscle tissue development.

– 60 CAPSULES per Bottle | 10mg Per Capsule –

Molecular Formula: C20H24ClN3O4S
Molecular Mass : 437.94026 g/mol

RAD-140 Capsules

RAD-140, also known as Testolone, is a potent selective androgen receptor modulator (SARM) that has garnered attention for its potential to induce significant anabolic effects for its ability to increase lean muscle mass. With high affinity and specificity for the androgen receptor, RAD-140 exhibits anabolic properties in both rodents and nonhuman primates, making it a promising compound for muscle and bone development.

Unlike traditional anabolic steroids, RAD-140 specifically targets muscle and bone tissues, presenting an advantage in promoting lean muscle growth without the androgenic side effects. Typically used in cycles RAD-140 is reputed for its efficiency in promoting muscle development and potentially enhancing physical performance.

Clinical trials in animals confirmed that RAD-140 effectively increases muscle mass, possesses strong anabolic properties, and acts selectively in the muscles and bones.

– 60 CAPSULES per Bottle | 10mg Per Capsule –

Molecular Formula: C20H16ClN5O2
Molecular Weight: 393.83 g/mol

MK677 Capsules

MK-677, also known as Ibutamoren, is a selective agonist of the ghrelin receptor and a growth hormone secretagogue. This compound has gained attention for its potential benefits, including muscle-building, improved bone density, better sleep, and anti-aging properties. Despite being classified as a selective androgen receptor modulator (SARM), MK-677 actually works as a growth hormone secretagogue, stimulating the production of human growth hormone. Research has indicated its potential in promoting the secretion of growth hormone and increasing insulin-like growth factor 1 levels.

This particular SARM has been shown in laboratory research to increase bone mineral density and muscle mass, making it a potential treatment option for elderly individuals. In addition, studies have shown that MK-677 Ibutamoren Capsules also help to reduce body fat, by increasing the body’s metabolic rate, which burns calories more efficiently and could lead to weight loss.

– 60 CAPSULES per Bottle | 10mg Per Capsule –

Molecular Formula: C27H36N4O5S
Molecular Weight: 528.662 g/mol

Like our Bulking Stack? Shop Liquid Bulking Stack and more SARM Stacks from Direct SARMS


[1] Selective Androgen Receptor Modulator RAD140 Is Neuroprotective in Cultured Neurons and Kainate-Lesioned Male Rats, Endocrinology. 2014 Apr; 155(4): 1398–1406. by Anusha Jayaraman, Amy Christensen, et al.

[2] Effects of an Oral Ghrelin Mimetic on Body Composition and Clinical Outcomes in Healthy Older Adults: A Randomized, Controlled Trial, Ann Intern Med. 2008 Nov 4; 149(9): 601–611. by Ralf Nass, M.D., Suzan S. Pezzoli, et al.

[3] Myostatin inhibitor YK11 as a preventative health supplement for bacterial sepsis, Biochemical and Biophysical Research Communications
Volume 543, 5 March 2021, Pages 1-7 by Su Jin Lee, Amal Gharbi et al.

Do I need PCT & other Supplements?

Cycle support capsules are recommended for any Sarm cycle including the SARMs Bulking Stack. Cycle support maximizes performance and offers you the needs of your body during extensive training and re-composition. Some SARMS research products will suppress your natural level of testosterone temporarily. After your cycle, it is important to restore your natural testosterone to 100% to preserve your cycle results. Our Sarms PCT is specifically designed to ensure that all your gains are maintained. For SARMs Bulking Stack, 4-6 weeks of taking PCT, post cycle is appropriate.

Shop SARM Cycle Support Supplements from Direct SARMS


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 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.

All images are for display purposes only. The products you receive may differ slightly from the images. But the quality always remands as a premium product.


RAD140 Direct Sarms CertificateMK-677 HPLC CertificateYK-11 HPLC Certificate