

Drug Class: Androgen; Dihydrotestosterone Derivative
Active Substance: Mesterolone
Strength: 25 mg/tablet
Amount: 30 Tablets
Active Life: 12-24 Hours
Average Dose: 25-75 mg/day
Liver Toxicity: Low
Aromatization Rate: No
Anabolic Rate: 30%
Androgenic Rate: 150%
Manufacturer: Kalpa Pharmaceuticals
Proviroxyl is Kalpa Pharmaceuticals' high-quality version of Mesterolone, more widely recognized under the brand name Proviron. Each tablet contains 25 mg of Mesterolone, a powerful oral androgen that does not aromatize into estrogen, making it a vital compound for bodybuilders during cutting cycles or post-cycle therapy (PCT).
Mesterolone is primarily used to restore natural testosterone levels, increase libido, and enhance the effects of other steroids by improving free testosterone availability. It also provides a mild hardening effect, especially when used alongside injectable compounds like Masteroxyl 100 or Duraxyl 100.
For improved physique hardening and estrogen control, Proviroxyl can be stacked with orals like Stanoxyl 10 or injectables like Sustaxyl 350. Advanced users may include it in bridge phases or low-dose maintenance cycles.
To learn more about Mesterolone's clinical background, refer to this PubMed article on androgenic compounds.
Kalpa Pharmaceuticals is known for GMP-grade steroid manufacturing, and their Proviroxyl tablets are lab-verified and quality-controlled. When sourcing from a trusted Kalpa supplier, you ensure consistent dosing and real results.
Proviroxyl is used to enhance testosterone activity, reduce estrogenic effects, and support libido during or after steroid cycles.
It has low liver toxicity, making it suitable for long-term support during cycles.
Yes, it is often stacked with cutting steroids like Masteron or Winstrol for enhanced hardness and estrogen control.
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Drug Class: Anabolic Steroid
Active Substance: Oxandrolone
Strength: 10 mg/tablet
Amount: 50 Tablets
Active Life: 9 Hours
Average Dose: 10–40 mg/day
Liver Toxicity: Mild
Aromatization Rate: None
Anabolic Rate: 322%
Androgenic Rate: 24%
Manufacturer: Kalpa Pharmaceuticals
Drug Class: Androgen; Anabolic Steroid
Active Substance: Oxymetholone
Strength: 50 mg/tablet
Amount: 50 Tablets
Active Life: 8 Hours
Average Dose: 50–100 mg/day
Liver Toxicity: Yes
Aromatization: No (but estrogenic activity present)
Anabolic Rate: 320%
Androgenic Rate: 45%
Manufacturer: Kalpa Pharmaceuticals
Drug Class: Androgen; Anabolic Steroid
Active Substance: Fluoxymesterone
Strength: 10 mg/tablet
Amount: 50 Tablets
Active Life: 6–9 Hours
Average Dose: 10–30 mg/day
Liver Toxicity: High
Aromatization Rate: Low
Anabolic Rate: 1900%
Androgenic Rate: 850%
Manufacturer: Kalpa Pharmaceuticals
Drug Class: Anabolic Androgenic Steroid (AAS)
Active Substance: Stanozolol
Strength: 50 mg/tablet
Amount: 20 Tablets
Active Life: 8–9 hours
Average Dose: 25–50 mg/day
Liver Toxicity: High
Aromatization Rate: None
Anabolic Rate: 320%
Androgenic Rate: 30%
Manufacturer: Kalpa Pharmaceuticals
Drug Class: Anabolic Androgenic Steroid (AAS)
Active Substance: 4-Chlorodehydromethyltestosterone
Strength: 10 mg/tablet
Amount: 100 Tablets
Active Life: 16 hours
Average Dose: 30–50 mg/day
Liver Toxicity: Moderate to High
Aromatization Rate: None
Anabolic Rate: 100%
Androgenic Rate: Low
Manufacturer: Kalpa Pharmaceuticals
Jan 28, 2022 (06:08)
I used the proviron threw out my winter bulker. I just love this proviron it just makes you feel great on cycle. From libido, to the hardness, to not converting to estrogen, to the anabolic well being feeling that we all love.... its just great! I was running at 50mg because i was dosing based on my previous dosing of ugl proviron. Droped to 25mg and it was all i needed. I made the drop when i started having some prostate issuse. So i upped my prostate support, and lowered my proviron dose and all was well. And to be honest the only differences i noticed were positive ones. Like not peeing all night. People always rave about proviron and i do too, but it is a dht steroid and can give you issues that dht steroids bring. Like in my case prostate problems. Start w a lower dose.