OTR-AC, also known as Ostarine-O-Acetate, is a modified version of MK-2866 (Ostarine) that has been synthesized through esterification. This process enhances its potency, biodistribution, and half-life. By esterifying anabolic agents, their half-life is extended by at least 10-fold, meaning that the active ingredient can remain bioactive for a significantly longer duration.

OTR-AC is currently undergoing research to explore its potential in preventing muscle-wasting diseases and promoting muscle mass growth. For this reason, buy OTR-AC for research purposes only.

OTR AC Product Details

Ostarine, also known as enobosarm or Gtx-024 falls under the category of Selective Androgen Receptor Modulators (SARMs). Its distinct advantage lies in its non-steroidal nature, setting it apart from conventional anabolic compounds. Unlike those compounds, Ostarine does not undergo aromatization or reduction by aromatase and 5-alpha reductase enzymes.

The unique characteristic of OTR-AC liquid makes it a promising option for laboratory research use, with the potential to build muscle mass and exert positive effects as a tissue-specific anabolic agent.

  • CAS Number 1025658-44-9
  • Molar Mass 431.37 g/mol
  • Chemical Formula C21H16F3N3O4
  • IUPAC Name 5-(1H-pyrazol-5-yl)-1-[2-[4-(trifluoromethoxy)phenoxy]ethyl]indole-2-carboxylic acid

Key Features of OTR AC for Sale

  • 98% Purity
  • 1000mg
  • Sold for research purposes only

Potential Benefits of OTR AC

OTR-AC and Diabetes

Preliminary research suggests that Ostarine (OTR-AC) may have therapeutic potential in diabetes or individuals at risk for diabetes. Studies have shown that treatment with Ostarine leads to decreased fasting blood glucose levels, reduced insulin levels, and improved insulin resistance. These findings indicate that selective androgen receptor modulators (SARMs) like OTR-AC may hold promise as potential therapeutic options for diabetes. [R]

OTR-AC and Lean Body Mass

Studies conducted on elderly men and postmenopausal women have shown that OTR-AC (GTx-024) has the potential to increase total lean body mass and improve physical function in a dose-dependent manner. These findings suggest that OTR-AC could be utilized for the prevention and treatment of muscle wasting caused by cancer and other chronic diseases. [R]

OTR-AC and Cholesterol

In the same study, it was observed that Ostarine (OTR-AC) caused a dose-dependent decrease in LDL and HDL cholesterol levels. However, it’s important to note that the average LDL/HDL ratio remained within the low cardiovascular risk category across all doses. [R]

OTR-AC and Postmenopausal Osteoporosis

In animal studies involving ovariectomized rats, Ostarine (OTR-AC) has shown promising effects on early bone healing and potential as a therapy for osteoporosis. It has demonstrated positive impacts on bone microstructure parameters. Although the biomechanical qualities of the bone have not shown significant changes in short-term therapy, longer treatment courses might yield improved results. [R] [R]

OTR-AC and Cancer Cachexia

Cancer cachexia, a condition characterized by muscle wasting in cancer patients, has been shown to have detrimental effects on physical function and overall health outcomes. While the positive effects of OTR-AC, a selective androgen receptor modulator, on lean body mass and physical function in cancer patients with cachexia, have been demonstrated in a study, it’s important to note the limitations of small sample sizes and diverse cancer types studied. [R]

OTR-AC and Improvement of Muscle Tissue

Ostarine, as a selective androgen receptor modulator, has garnered attention for its potential benefits in enhancing physical performance and promoting muscle growth. Animal studies, particularly those conducted on rats, have revealed interesting findings. One study observed increased muscle vascularization through higher capillary density and enhanced muscle enzyme activity, without causing hypertrophy in muscle fibers. [R]

Another investigation demonstrated increased muscle mass in rats, associated with elevated expression of myogenin, MyoD, and MyH after Ostarine administration. These findings suggest that OTR-AC activates the androgen receptor to support muscle tissue proliferation and differentiation. [R]

How It Works

Ostarine, a member of the selective androgen receptor modulator (SARM) family, exerts its mechanism of action by binding to androgen receptors in the body. This interaction initiates a series of conformational changes within the androgen receptor, leading to altered interactions with the coactivator and corepressor proteins found in various tissues. Consequently, Ostarine modifies the receptor’s ability to regulate gene expression, resulting in tissue-specific effects.

This selective modulation of androgen receptors allows Ostarine to promote muscle growth and potentially improve physical function. Unlike testosterone or non-selective synthetic anabolic steroids, Ostarine’s tissue-specificity minimizes undesirable side effects on the prostate, skin, and hair, making it a promising alternative for anabolic purposes. By targeting androgen receptors, Ostarine offers the potential to increase muscle mass and enhance physical performance while reducing the risk of unwanted adverse effects commonly associated with other compounds.


When considering the use of OTR-AC (Ostarine-O-Acetate), it is important to take certain precautions. Studying research chemicals requires a responsible and informed approach to ensure safety and meaningful scientific exploration. Research chemicals, also known as designer drugs or experimental compounds, are substances synthesized for scientific investigation or exploration of their properties.

Monitoring for potential side effects associated with OTR-AC, such as insulin resistance, liver damage, or cardiovascular risks, is important. Any adverse reactions should be promptly reported and observed.

Potential Side Effects

OTR-AC, a selective androgen receptor modulator, has shown benefits and potential metabolic side effects in various areas of study. One area of interest is its potential to prevent muscle wasting, which could be beneficial for individuals with conditions such as cancer cachexia. Additionally, OTR-AC has demonstrated improvements in lean body mass, offering a potential avenue for combating muscle loss caused by chronic diseases.

However, it’s important to note that OTR-AC may have some side effects. Insulin resistance has been observed in studies, which raises concerns about its impact on glucose metabolism. Moreover, there is evidence suggesting potential liver damage associated with OTR-AC use. Lastly, while not directly linked to OTR-AC, it’s worth noting that the use of androgenic compounds can increase the risk of cardiovascular events such as heart attacks.


In conclusion, the use of OTR-AC (Ostarine-O-Acetate), also known as ostarine acetate ester or ostarine acetic acid ester, offers several potential benefits. Laboratory and preclinical research have demonstrated its ability to build lean muscle mass and promote muscle growth. As a tissue-specific anabolic agent, OTR-AC works by binding to androgen receptors and inducing conformational changes that affect the receptor’s interaction with proteins in different tissues, regulating gene expression.

The potential chemical synthesis of OTR-AC has shown positive effects on muscle mass and physical function, making it a promising option for muscle building. Moreover, its professional and discreet packaging ensures product purity and quality. However, it is important to note that the use of OTR-AC is currently limited to laboratory research and its suitability for human consumption requires further clinical research.

Nonetheless, the evidence suggests its potential to enhance muscle mass and reduce body fat in a targeted and specific manner.


Please take note of the scientific applications of this product and carefully read our Terms and Conditions before purchasing RCD.bio. By completing your order and submitting payment, you agree to abide by our Terms and Conditions. Please be aware that the product packaging may differ slightly from the images displayed on our website. Nevertheless, we provide professional and discreet packing.

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PLEASE NOTE: All products offered by RCD.bio are strictly intended for laboratory and research purposes only. They are not intended for use on animals or humans.