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Muscle Building Stack


When used in a muscle building stack, MK-677, MK-2866, LGD-4033, and RAD-140 SARMs offer a range of benefits, including increased muscle mass, enhanced strength gains, and improved body recomposition by reducing body fat.

Muscle Building Stack includes:

LGD 4033 – 60 CAPSULES per Bottle | 10mg Per Capsule
RAD140 – 60 CAPSULES per Bottle | 10mg Per Capsule
MK 2866 – 60 CAPSULES per Bottle | 10mg Per Capsule
MK677 – 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 Muscle Building Stack

When used in a muscle building stack, the combination of MK-677, MK-2866, LGD-4033, and RAD-140 SARMs offers a comprehensive approach to achieving notable benefits in muscle growth, body composition and overall athletic performance. MK-677, also known as Ibutamoren, is recognized for its potential to increase human growth hormone (HGH) levels, which can contribute to enhanced muscle growth and building strength. Additionally, MK-677 has been linked to improvements in sleep quality, skin health, and the promotion of lean muscle mass.

Meanwhile, MK-2866, or Ostarine, is valued for its ability to promote body recomposition by increasing muscle mass and reducing body fat, often likened to the effects of anabolic steroids like Anavar. LGD-4033, known as Ligandrol, has shown promising outcomes in terms of muscle tissue gains and body recomposition, with studies highlighting its potential to positively impact body composition parameters. RAD-140, or Testolone, has been associated with significant lean muscle building effects and strength, making it a valuable addition to a muscle building stack.

These SARMs, when combined strategically, offer a multifaceted approach to optimizing muscle growth, improve strength, and physical composition, thus presenting a compelling option for individuals seeking comprehensive support in their fitness and physique goals.


LGD-4033, also known as Ligandrol, is a selective androgen receptor modulator (SARM) that has garnered significant attention for its potential impact on strength and endurance, muscle growth and body recomposition. As a novel nonsteroidal SARM research chemical, LGD-4033 exhibits high affinity and selectivity for androgen receptors, presenting an appealing alternative to traditional anabolic steroids.

Clinical studies have suggested that LGD-4033 may mimic the activity of testosterone in the body, contributing to enhanced lean muscle mass, bone density and improved strength. However, it’s important to note that the use of LGD-4033 and other SARMs has been prohibited at all times for all athletes due to concerns about potential performance-enhancing effects. Furthermore, reports have raised caution regarding the potential for liver injury side effects associated with the use of LGD-4033, leading to FDA warnings against its use. Therefore, while the potential benefits of LGD-4033 in muscle wasting diseases and osteoporosis are being studied, careful consideration and consultation with healthcare professionals are essential before considering its use to fully understand both the potential benefits and risks

– 60 CAPSULES per Bottle | 10mg Per Capsule –

Molecular Formula: C14H12F6N2O
Molecular Weight: 338.25 g/mol


RAD-140, also known as Testolone, is a potent androgen receptor modulator (SARM) with an increasing body of research supporting its potential benefits. This compound is designed to mimic the effects of testosterone in the body, making it appealing for individuals seeking to enhance lean muscle growth and strength. Research suggests that RAD-140 exhibits high specificity and selectivity for androgen receptors, contributing to its anabolic effects on bones and muscles with minimal androgenic side effects.

It is important to note that the use of RAD-140 has been associated with concerns regarding potential drug-induced liver injury, necessitating caution and medical supervision during its usage. Furthermore, RAD-140 is considered more anabolic than testosterone, positioning it as a valuable tool for individuals aiming to increase lean body mass and improve their physique.

– 60 CAPSULES per Bottle | 10mg Per Capsule –

Molecular Formula: C20H16ClN5O2
Molecular Weight: 393.83 g/mol


MK-677, also referred to as Ibutamoren, is a selective and non-peptide agonist of the ghrelin receptor, recognized for its potential benefits in muscle mass building and overall well-being. It acts as a potent growth hormone secretagogue, offering a broad array of potential advantages. Research and user experiences suggest that MK-677 may contribute to muscle-building efforts, aid in reducing muscle wasting, enhance bone density, improve quality of sleep, and even exhibit anti-aging properties. These diverse benefits have piqued the interest of individuals looking to increase endurance and overall health. However, it’s important to approach the usage of MK-677 with caution and thorough consideration of potential risks and side effects including water retention.

– 60 CAPSULES per Bottle | 10mg Per Capsule –

Molecular Formula: C27H36N4O5S
Molecular Weight: 528.662 g/mol


MK-2866, also known as Ostarine, is a selective androgen receptor modulator (SARM) that has gained attention in the bodybuilding world for its potential benefits in improving lean body mass and enhancing muscle tissue development. While not approved by the FDA and currently only for laboratory research use, MK-2866 is commonly found in the fitness and bodybuilding community as a dietary supplement. Research and user experiences have suggested that Ostarine may contribute to the prevention of muscle wasting and aid in muscle building efforts.

This SARM is known for its potential to improve overall body muscle tone by promoting lean muscle gain without the androgenic side effects associated with anabolic steroids. Users report rapid strength gains and enhanced physical performance when incorporating ostarine MK-2866 into their fitness regimens

– 60 CAPSULES per Bottle | 10mg Per Capsule –

Molecular Formula: 
Molecular Weight: 389.33 g/mol

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


[1] The Safety, Pharmacokinetics, and Effects of LGD-4033, a Novel Nonsteroidal Oral, Selective Androgen Receptor Modulator, in Healthy Young Men, J Gerontol A Biol Sci Med Sci. 2013 Jan; 68(1): 87–95. by Shehzad Basaria, Lauren Collins, et al.

[2] A First-in-Human Phase 1 Study of a Novel Selective Androgen Receptor Modulator (SARM), RAD140, in ER+/HER2- Metastatic Breast Cancer, Clinical Breast Cancer Volume 22, Issue 1, January 2022, Pages 67-77 by Patricia LoRusso, Erika Hamilton et al.

[3] Selective androgen receptor modulators in preclinical and clinical development, Nucl Recept Signal. 2008; 6: e010 by Ramesh Narayanan, Michael L. Mohler et al.

Do I need PCT & other Supplements?

Cycle support capsules are recommended for any Sarm cycle. Cycle support maximizes performance and offers you the needs of your body during extensive training and re-composition. Some Sarms 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 Muscle Building 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.


LGD-4033 HPLC CertificateRAD140 Direct Sarms CertificateMK-677 HPLC CertificateMK-2866 HPLC Certificate