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Proviron 25 (Mesterolone)

(2 customer reviews)


Proviron 25
Proviron, marketed under the brand name Mesterolone, stands as one of the most time-honored anabolic androgenic steroids in the market. Derived from dihydrotestosterone (DHT), it falls under the category of androgenic steroids. While it’s not primarily employed for substantial muscle mass gains, it plays a crucial role during specific training phases. Proviron is particularly valuable in cutting cycles and addressing androgen deficiencies, in addition to its reputation for possessing anti-estrogenic properties.

What is Proviron?

Proviron (Mesterolone) is a modified form of the DHT hormone, characterized by the addition of a methyl group at the carbon one position. This structural alteration serves to safeguard it from hepatic breakdown, allowing the hormone to remain intact when taken orally. Unlike most anabolic steroids, Proviron features this methyl group instead of the C17-alpha-alkylation (C17-aa) commonly seen in other compounds of its kind. However, this unique modification comes at a cost, as Proviron’s overall bioavailability is notably lower than that of its C17-aa counterparts. This limitation has contributed to its relative lack of popularity among many performance-enhancing athletes, although this sentiment may not be entirely warranted.Proviron is assigned an androgenic rating of 30 to 40 and an anabolic rating of 100 to 150, with these values compared to testosterone, which is designated as having a rating of 100 in both categories. Interestingly, despite having an anabolic rating higher than that of testosterone, Proviron exhibits limited anabolic characteristics. Conversely, its androgenic rating suggests a higher level of androgenic activity than what its structural rating might initially imply.


Proviron as a Standalone Cycle

Running a standalone cycle with any compound is generally discouraged due to the potent suppressive nature of most anabolic substances, which often lead to a substantial reduction in natural testosterone production. However, Proviron stands apart as a notably less suppressive oral steroid. Consequently, the likelihood of Proviron causing a significant decline in endogenous testosterone production is nearly negligible. Nevertheless, it’s essential to note that running a Proviron-only cycle is unlikely to yield substantial benefits. Proviron is typically regarded as a mild compound, and the discernible effects of a solo Proviron cycle are limited to enhanced dryness and an increased libido. To maximize the advantages of Proviron use, it is advisable to incorporate it into a stack with other steroids.



If you plan to incorporate anabolic steroids into your regimen, you’ll discover that Proviron complements them effectively. When focusing on cutting, it proves most beneficial when used in conjunction with anabolic steroids like Masteron, Winstrol, Anavar, and others. Proviron significantly augments the androgenic properties of these steroids, promoting weight gain and the desired lean, chiseled physique. During the bulking phase of your cycle, it pairs seamlessly with any anabolic steroids, although its necessity may vary from person to person. Some individuals prefer to keep it on hand, using it as needed to optimize their results.


Post Cycle Therapy Use

There’s considerable ambiguity in the bodybuilding community when it comes to the use of Proviron during post-cycle therapy. In the past, during an era when Selective Estrogen Receptor Modulators (SERMs) weren’t readily accessible and individuals sought assistance in this regard, Proviron was a common choice. However, given the wide array of ancillary drugs and supplements available today, the necessity for Proviron in post-cycle therapy has diminished significantly.
Proviron is not as potent a suppressor as some other steroids, but it still exerts a slight suppressive effect. Consequently, its inclusion in post-cycle treatment could potentially be counterproductive. Nowadays, there are numerous superior alternatives to Proviron readily accessible, making its use less advisable.


What to Consider Prior to Using Proviron

Certain medications may not be appropriate for individuals with specific medical conditions. In some cases, medication should only be administered under specific circumstances as advised by a healthcare professional. Prior to commencing Proviron treatment, it is imperative to inform your physician of any existing medical conditions, including but not limited to liver or kidney issues, hypertension, epilepsy, migraines, diabetes, or cancer. Additionally, disclosing any other medications you are currently taking is essential to ensure a tailored and safe prescription for Proviron based on your individual needs.


Please be aware that none of the information provided here should be considered as medical advice. If you are considering starting a new medication regimen, it is essential to consult with your healthcare provider first.

Usage and Dosage

The appropriate Proviron dosage depends on an individual’s experience and goals. Typically, a physician recommends the dosage based on specific needs. However, the following dosage is recommended if not directed otherwise by a healthcare provider:
For potency issues and declining physical activity, a Proviron course lasting four to six weeks or an extended treatment over several months is recommended. The treatment can be repeated as needed. The usual advised dosage is one 25 mg tablet three times daily initially, reducing to once or twice daily as the treatment progresses.
For the development of secondary male sex characteristics, the recommended Proviron dosage is one 25 mg tablet three to four times daily for several months, with a maintenance dose of one 25 mg tablet twice or thrice daily.
In cases of oligozoospermia, a Proviron tablet of 25 mg twice or thrice daily is recommended for a spermatogenesis cycle, with the possibility of repeating the treatment as required.
Before commencing treatment with Proviron, it is imperative to thoroughly review the manufacturer’s accompanying information leaflet found inside the packaging. This booklet provides comprehensive details about Proviron tablets. It is essential to adhere precisely to the prescribed dosage as directed by your healthcare provider. Your physician may adjust the daily pill count as needed. The correct dosage will be determined and advised by a certified healthcare professional. Proviron can be taken either before or after meals, and it should be swallowed whole with a sip of water, avoiding any chewing of the tablet. Maintaining a consistent daily dosing schedule is advantageous, as it assists in ensuring adherence to the regimen. If you happen to forget a dose, take it as soon as you remember, but refrain from doubling up on doses to compensate for a missed one.


Proviron possesses notable characteristics that define its functionality.

Elevates Free Testosterone Levels:
Proviron exhibits a robust binding affinity for Sex-Hormone-Binding-Globulin (SHBG), establishing itself as one of the most potent anabolic steroids in this regard. This property increases the presence of free testosterone circulating in the body. For individuals using anabolic steroids, this is advantageous as a significant portion of these compounds remains in a free state, enhancing their potency.
Balances Estrogen Levels:
Additionally, Proviron can interact with the aromatase enzyme responsible for converting testosterone into estrogen. By binding to the aromatase enzyme, Proviron inhibits its activity and safeguards against estrogen-related side effects. Depending on an individual’s cycle, Proviron can effectively address anti-estrogen requirements.
Enhances Anabolic Steroids:
Mesterolone, the active ingredient in Proviron, exhibits a strong affinity for the androgen receptor. This property enhances the functionality of other steroids and promotes metabolic activity through direct lipolysis. It results in muscle hardening and a desirable aesthetic appearance, akin to what fitness models aspire to achieve. It can be particularly beneficial when used in combination with primarily “wet” compounds like Testosterone.
Male Infertility Treatment:
Proviron differs from other anabolic steroids in its impact on fertility. It does not suppress gonadotrophs like some steroids do. Instead, it increases sperm production due to its powerful androgenic properties, improving sperm quality and quantity. However, excessive use of Proviron can lead to gonadotropin suppression and a significant reduction in sperm production.
Libido Enhancement:
Unlike many anabolic compounds notorious for decreasing libido and causing discomfort, Proviron has the opposite effect. It boosts libido and promotes a sense of well-being due to its derivation from DHT, a male sex hormone known for increasing sex drive.
Proviron serves to enhance the development, growth, and proper functioning of androgen-dependent target organs. When addressing prepubertal hypogonadism, it encourages the emergence of secondary male sexual characteristics. For all young patients, comprehensive laboratory and clinical assessments are indispensable prerequisites prior to initiating treatment. Proviron tablets may be employed in scenarios where gonadal function has diminished post-puberty, serving as a substitute therapy.

Side Effects

Despite having a high safety rating among anabolic steroids, Proviron can still potentially cause various side effects in some users. While the likelihood of these side effects occurring is low, they should be acknowledged. Proviron is not recommended for use by females, both therapeutically and for performance purposes, due to a high risk of virilization. The potential side effects of Proviron can be categorized as follows:
Androgenic Effects:
These may include accelerated hair loss in individuals predisposed to male pattern baldness and acne. However, these effects are largely influenced by genetic factors, and not everyone will experience them.
Cardiovascular Strain:
Proviron can have a negative impact on cholesterol levels, particularly in individuals with pre-existing high cholesterol. Caution is advised, and careful monitoring of intake levels is crucial for those using this steroid.
Testosterone Suppression:

While Proviron does suppress natural testosterone production to some extent, the degree of suppression is minimal and generally inconsequential at dosages of 150 mg or less per day. However, exceeding this dosage can lead to a more noticeable suppression of natural testosterone production.


An overdose of Proviron can lead to a range of distressing symptoms, including confusion, depression, unconsciousness, dilated pupils, muscle stiffness, disorientation, hypotension, vomiting, heart failure, and respiratory depression. To ensure your safety, it is imperative to adhere to the prescribed dosage and refrain from making any modifications without seeking guidance from a healthcare provider.

2 reviews for Proviron 25 (Mesterolone)

  1. Clarence

    Impressive gains in a short time.

  2. Franky Smalls

    Proviron has been a MUST in all my stacks for years. The last site I ordered from couldn’t keep it in stock for some reason, so Im happy I found a solid source. The site could use some work but I think they’re pretty new. Call me a critic.

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