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99% purity raw powder Proviron /Mesterolone CAS 1424-00-6 to build body

99% purity raw powder Proviron /Mesterolone CAS 1424-00-6 to build body

  • 99% purity raw powder Proviron /Mesterolone CAS 1424-00-6 to build body
  • 99% purity raw powder Proviron /Mesterolone CAS 1424-00-6 to build body
99% purity raw powder Proviron /Mesterolone CAS 1424-00-6 to build body
Product Details:
Place of Origin: China
Brand Name: Top Pharm
Certification: IOS 901
Model Number: 1424-00-6
Payment & Shipping Terms:
Minimum Order Quantity: 10g
Price: Negotiable
Packaging Details: As your requirments
Delivery Time: 3-6 working days
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Supply Ability: bulk stock
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Detailed Product Description
Appearance: White Loose Lyophilized Powder. Purity: 99%
Spec: 10g CAS: 1424-00-6
MF: C20H32O2 MW: 304.47
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Proviron (Mesterolone)


Alias: Proviron
CAS No: 1424-00-6
Einecs No: 215-836-3
MF: C20H32O2
Purity: 99%
Appearance: white crystalloid powder,soluble in acetone, ethanol, ethyl ether, ethyl acetate, insoluble in water.

Proviron (mesterolone) is an interesting anabolic steroid, though it is not of much value to bodybuilding. It seems that the most common reason for many to consider including it in a steroid stack is for anti-estrogenic activity. In the days before anti-aromatases and the use of SERMs (selective estrogen receptor modulators) such as Clomid and Nolvadex, there was some merit to this.


Proviron was popularized years ago as an anti-estrogen because it is has a high affinity to bind to the aromatase enzyme, so anabolic steroid (AS) users could use it to serve as their AI (aromatase inhibitor) replacement. Bodybuilders were using it during post cycle therapy (PCT); unfortunately, studies have shown proviron does suppress LH (luteinizing hormone) – in some cases. As a result, high proviron dosage can prevent the pituitary gland from recovering after a steroid cycle. Some users insist proviron does not suppress the HPTA when used in PCT or during a bridge; however, this is up for debate. As a side note, some studies support long term use of proviron at high dosages without serious suppression. The science supports proviron use for PCT but not in every case.

Now that we have aromasin, arimidex, and letrozole, proviron has become obsolete when it comes to anti-estrogen usage. We know that the true aromatase inhibitors (AI) are safe to use during post cycle therapy, and will not suppress your HPTA. Though, proviron shouldn't either.

In this respect, it doesn't mean proviron does not have its uses on cycle when using an aromatizing compound such as dianabol, testosterone, nandrolones, or equipoise. In fact, a user can expect to have a harder look, more vascularity, and less puffiness when stacking proviron with a wet compound.

Another benefit of proviron is that it binds very well to SHBG (sex hormone binding globulin), which is the hormone responsible for reducing free testosterone circulating in the body. This is probably the reason why some use proviron during PCT.

Those that compete will appreciate proviron's hardening properties. Since proviron is 5-alpha reduced and not capable of forming estrogen, it will help give a drier look.


1. What is Proviron? How does it work? 

Proviron is a brand name for an androgen called This is an oral drug that is not considered to be an anabolic steroid due to its low anabolic effects in the body. Actually, it’s deemed to possess zero androgenic effects. Proviron was developed in 1934 by Schering making it among the oldest manufactured and marketed steroids for therapeutic use. The drug has been on the market with different brand names, but Proviron has remained dominant over the years. On the other hand, Proviron is still one of the most misunderstood steroids. You can buy the drug from various stores or order online on our website.

Proviron (1424-00-6) is a unique steroid that shares various potent similarities to  to some degree. In terms of its performance, Proviron cannot be used to promote massive muscle mass buildups, but it makes an essential supplement in bodybuilding training. That said, Proviron is mostly used in cutting cycles by many bodybuilders and athletes. In the therapeutic world, Proviron is among the most used steroid in modern medicine. However, Mesterolone since its development has never been approved for human consumption by the United States of America FDA.

The primary Proviron use in the medical world is to treat androgenic deficiencies which mostly affects the old. The drug is also used as a fertility aid and pre-pubescent for men. This alone makes the Proviron a very useful steroid that provides positive effects in the human body. Although the drug is considered to be an old medication, it has stood the test of time, and over the years it has been a safe, and tolerable for many patients. Bodybuilders and other athletes also utilize the drug’s abilities to help them gain hard muscles and improve testosterone hormone levels. Testosterone hormone plays a vital role in helping athletes and bodybuilders in enhancing their performance.

Proviron is dihydrotestosterone derived anabolic steroid, and it is structurally altered DTH hormone with addition of methyl group with carbon on one position. This enables the hormone to survive the oral ingestion since it is protected from hepatic breakdown. Proviron is among the few oral anabolic steroids which are not C17-alpha alkylated, but in its place, it carries methyl group. Oral Primobolan is another well-known steroid with the same methyl group. Proviron has an androgenic rating of about 30 to 40 and anabolic rating ranging from 100-150. The evaluations were carried out in comparison with testosterone. Even though Proviron has a higher anabolic score than testosterone, it portrays shallow anabolic properties.

The most well-known Proviron benefit is its capability to act as anti-estrogen through its action as an aromatase inhibitor. The drug’s aromatase inhibitor strength can be compared to that of Arimidex, but it’s slightly lower. Proviron also has a high affinity for Sex Hormone Binding Globulin (SHBG), which is a protein that binds comfortably to the anabolic steroids in your bloodstream as well as rendering them inactive once they bound. 

Therefore, taking Proviron with other anabolic steroids enhances its activities and enables you to enjoy maximum results. The drug provides a pathway and an enabling environment through the mechanism mentioned above leaving more unbound and free testosterone to execute its duties. For better results, it’s advisable for all users to undergo a medical checkup and involve a doctor in the whole process. No matter how the drug is effective, sometimes it might not work well with some people due to their health condition or complexity of the body systems.

99% purity raw powder Proviron /Mesterolone CAS 1424-00-6 to build body 0

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