PROVIRON 25 - Sigma Pharmaceuticals

Mesterolone, sold as Proviron by Bayer, is widely recognized for its unique ability to enhance androgen levels without contributing to estrogenic side effects. Due to its DHT-derived nature, mesterolone does not aromatize, making it a natural fit in lean muscle cycles. Its anti-aromatase properties also help manage estrogen when combined with other steroids. Commonly used in 6-12 week cycles, mesterolone aids in achieving a defined physique by increasing androgen-to-estrogen ratios, giving muscles a hardened, dense look without fluid buildup​.

Disclaimer: Information provided it this page is for general information only and does not substitute for professional medical advice.

For detailed information about PROVIRON 25 by Sigma Pharmaceuticals, consult with your doctor or healthcare professional.