Experience the multifaceted benefits of Proviron (Mesterolone) in your bodybuilding journey. With its anti-estrogenic properties, Proviron binds to aromatase enzymes, preventing testosterone conversion to estrogen, reducing the risk of gynecomastia and water retention. Additionally, Proviron binds to SHBG with higher affinity than testosterone, increasing free testosterone levels, enhancing physiological effects without elevating total testosterone. This gentle androgenic compound fosters a rigid, well-defined muscular aesthetic, ideal for cutting phases. Choose Proviron for its prowess in sculpting a leaner physique, refining muscle definition, and diminishing estrogen levels.
Generic Name:

Mesterolone 20mg

Compound Information:

Molecular Weight: 304.47 g/mol
Formula: C20H32O2
Anabolic Rating: 100-150
Androgenic Rating: 30-40

SKU: FLEX-TAB-029 Categories:, ,

Product Description

Dosage (Male)

40-150mg per day

Dosage (Female)

10-25mg per day

Dosage Frequency

Daily (for 6-12 weeks)

Dosage Type

Oral Tablet

Active Half-Life

Approximately 12 hours

Chemical Name


Post-Cycle Therapy

Clomid, Nolvadex, or HCG, 1-3 days after last dose. If stacking with longer esters then follow those protocols.

Elevated Muscle Hardness

Proviron stands out for providing bodybuilders with notable advantages in attaining heightened muscle hardness and definition. Its androgenic attributes contribute to increased muscle rigidity, resulting in a more finely sculpted and defined physique. Through its interaction with androgen receptors in muscle tissues, Mesterolone plays a pivotal role in achieving a distinctly pronounced and well-defined muscular appearance. This benefit proves particularly advantageous during cutting phases, as Proviron aids in safeguarding muscle mass while fostering a lean and finely shredded physique, preventing the loss of hard-earned muscles.

Accelerated Fat Metabolism

Proviron’s influence on fat loss emanates from its androgenic characteristics, impacting metabolism and fat oxidation. By engaging with androgen receptors, Proviron triggers an elevation in the metabolic rate, facilitating more effective calorie burning. This heightened metabolic activity encourages the body to utilize stored fat as an energy source, contributing to the gradual reduction of body fat. In cutting phases, where caloric intake is typically reduced, Proviron’s ability to enhance fat oxidation becomes particularly valuable, expediting the process of shedding excess body fat.

Increased Lean Muscle Mass

Proviron is recognized for its capacity to promote increased lean muscle mass, presenting bodybuilders with a valuable tool in their pursuit of muscle development. Through its androgenic properties, Mesterolone stimulates the growth of lean muscle tissue, contributing to a fuller and more sculpted physique. This effect is especially beneficial during bulking phases, where the emphasis is on muscle growth and development. Proviron’s role in fostering lean muscle gains adds another dimension to its versatility in the realm of bodybuilding.

Optimized Nitrogen Retention

Proviron proves advantageous for bodybuilders seeking optimized nitrogen retention, a crucial element in the muscle-building process. By influencing androgen receptors, Proviron aids in the retention of nitrogen within muscle tissues. Enhanced nitrogen retention promotes an environment conducive to muscle protein synthesis, supporting the development of lean muscle mass. This aspect of Proviron’s action is particularly valuable during periods of muscle growth, contributing to more effective and sustained gains in muscle size and strength.

Side Effects + Considerations

While Proviron exhibits effectiveness in specific medical conditions, its utilization as a performance-enhancing substance or for bodybuilding pursuits has raised apprehensions regarding potential side effects. A noteworthy repercussion of Proviron intake involves its impact on the endocrine system. Prolonged usage of this steroid can suppress the body’s natural testosterone production, inducing hormonal imbalances, testicular atrophy, and diminished fertility. Additionally, users may grapple with mood swings, irritability, and heightened aggression owing to the steroid’s androgenic properties, which influence the balance of neurotransmitters in the brain. Another worrisome facet of Mesterolone usage pertains to its potential negative effects on cardiovascular well-being. Similar to other anabolic steroids, Mesterolone has the capacity to alter cholesterol levels, leading to an elevation in “bad” LDL cholesterol and a reduction in “good” HDL cholesterol. This imbalance heightens the risk of atherosclerosis, heart disease, and hypertension. Furthermore, while Proviron’s hepatotoxicity is milder compared to some other steroids, it can still exert strain on the liver over time. Due to these potential risks and side effects, it is imperative for individuals contemplating Mesterolone usage to seek guidance from a healthcare professional beforehand. This ensures a comprehensive understanding of both the potential benefits and risks associated with the utilization of this drug.

Dosage for Adult Males:

40-150mg per day

Dosage for Adult Females:

10-25mg per day

Dosage Frequency:

Daily (for 6-12 weeks)

Dosage Type:

Oral Tablet

Our Guide to
Intramuscular Injection

Gather Your Equipment

If you're new to the process of injection, ensure you have all the essential supplies at your disposal before commencing. This includes the injectable substance, a sterile disposable syringe and needle, alcohol wipes, a secure container for proper needle disposal, cotton balls or gauze pads for cleansing, and optionally, a mirror for self-injection, if required. Having these items readily available ensures a seamless and uninterrupted injection process. It is vital to prioritize safety and efficiency to position your body optimally for health and longevity.

Compound Extraction

Once all the necessary materials are assembled, proceed to extract the substance from the vial. Keep the vial upright, slowly pull back the plunger to draw the prescribed dosage into the syringe. Be careful to extract the exact amount prescribed, adhering to the instructions provided by your healthcare professional. After filling the syringe, gently tap it to dislodge any air bubbles. If any air bubbles are present, push the plunger up slightly to eliminate them, ensuring that only the specified amount of the substance is in the syringe. Familiarize yourself with the proper injection depth before advancing to the next step.

Preparation Before Injection

Before administering your injection, choose a well-lit and clean area. Prior to starting, wash your hands thoroughly with soap and water to maintain hygiene. Once your workspace is prepared, ready the injection site, which could be the buttocks (gluteal muscles), thighs, or upper arm (deltoid muscle). Seek guidance from your healthcare provider on the appropriate site. Regardless of the chosen site, use an alcohol wipe to cleanse it, removing any dirt, oils, or contaminants. Allow the area to air dry completely after the cleaning process.

Compound Administration

With the syringe prepared, it's time to administer the injection. Hold the prepared syringe and carefully insert the needle into the designated injection site. Once the needle is inserted at the correct depth, pull back slightly on the plunger to confirm that you haven't hit a blood vessel. If blood appears in the syringe, retract the needle and attempt again with a new needle tip. Assuming there is no blood, steadily and slowly push the plunger to inject the substance. Take your time to ensure a controlled and comfortable administration of the injection. After the full dosage is administered, withdraw the needle from the injection site.

Safe Disposale of Needle Tips and Syringes

Ensuring the proper disposal of utilized syringes and needles is crucial for the safety of yourself and those around you. Once used, promptly deposit the syringe and needle into a designated sharps container. Avoid recapping the needle to prevent unintentional needle pricks. Familiarize yourself with the regulations in your local area concerning the appropriate disposal of medical waste. Numerous regions have specific guidelines for discarding sharps containers, and adhering to them is vital to safeguard both your community and the environment.

Incorporate Proviron Into a Stack

In the pursuit of fat loss and the augmentation of lean muscle development through the combination of steroids with Proviron, a comprehensive strategy can be adopted. Anavar, recognized for its fat-burning and muscle-preserving attributes, can synergize with Proviron to promote a lean physique. This tandem effect expedites fat loss while safeguarding hard-earned muscle mass. Introducing Clenbuterol to the stack can further heighten thermogenic properties, resulting in increased calorie expenditure and elevated metabolic activity. The amalgamation of Proviron, Anavar, and Clenbuterol proves especially efficacious during cutting phases, where individuals strive to reduce body fat and attain a more distinct appearance. Additionally, the inclusion of Winstrol, renowned for its robust anabolic effects, can provide added support for muscle development and strength gains. Lastly, supplementation with T3 (triiodothyronine) can optimize thyroid function, amplifying metabolism and fostering efficient fat utilization. As with any steroid stack, responsible usage and expert guidance are imperative to mitigate potential side effects and ensure safety and well-being throughout the cycle.

Usage Guidelines for Proviron

Seek Guidance From a Medical Professional

Before contemplating the usage of anabolic steroids, it's essential to seek advice from a qualified healthcare professional. They can evaluate your general health, discuss possible risks and advantages, and offer personalized guidance based on your specific needs.

Get High-Quality Items From Trusted Sources

Make sure to procure anabolic steroids from trustworthy sources to reduce the likelihood of receiving counterfeit or tainted products. Only buy from reliable suppliers who adhere to quality control standards and have a favorable reputation within the community.

Start Slow and Progress Gradually

If you opt to incorporate anabolic steroids, it is recommended to initiate the regimen with the smallest effective dosage. Incrementally raise the dosage if required, while closely monitoring your body's reactions and any potential adverse effects.

Prioritize Proper Post-Cycle Therapy

Following the conclusion of a steroid cycle, it's crucial to engage in a thorough post-cycle therapy routine. This aids in restoring natural hormone production, minimizing side effects, and preserving overall health and well-being.

Side Effects + Considerations

Anabolic steroids present substantial health risks that necessitate careful consideration. Consult healthcare professionals before use to comprehend potential adverse effects, including cardiovascular issues, hormonal imbalances, and psychological impacts. Strictly adhere to prescribed dosages and durations while prioritizing regular health monitoring. Adolescents should refrain from using these substances due to potential growth interference. Opt for alternative fitness methods to prioritize overall health and well-being, and always use under professional supervision.

The use of anabolic steroids demands thoughtful consideration due to serious health risks. Seek guidance from healthcare professionals before embarking on their use to fully understand potential adverse effects. Strictly adhere to prescribed dosages and durations, prioritize regular health monitoring, and avoid use by adolescents to prevent potential interference with growth. Explore alternative fitness methods that prioritize overall health and well-being, and use anabolic steroids only under the supervision of qualified professionals.


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