Sustaxyl 350 is an injectable anabolic steroid which comes in 10 mL Vials and contains 350 mg of Testosterone Propionate, Testosterone Phenylpropionate, Testosterone Isocaproate, Testosterone Decanoate, it is an original brand product of Kalpa Pharmaceuticals. For intramuscular injections. An excellent product for bulking cycles.


Sustaxyl 350, produced by Kalpa Pharmaceuticals, offers a sophisticated blend of testosterone esters, each designed to be released at different rates, providing a steady increase in testosterone levels. This review delves into the details of Sustaxyl 350’s composition, effectiveness, and gathers feedback from actual users to help potential users make informed decisions.

Product Overview

Sustaxyl 350 combines several testosterone esters: Testosterone Propionate, Testosterone Phenylpropionate, Testosterone Isocaproate, and Testosterone Decanoate, dosed at 350 mg/ml in a 10 ml vial. This blend is engineered to sustain elevated testosterone levels, reducing the frequency of injections needed, making it highly favored by athletes and bodybuilders for both bulking and cutting cycles.

User Reviews

  • James L. (Amateur Bodybuilder) “I’ve been using Sustaxyl 350 for the past four months, and the results are remarkable. The mix of fast-acting and long-lasting esters keeps my energy and strength levels consistently high. I’ve been able to push my workouts harder and longer than ever before.”
  • Natalie D. (Fitness Enthusiast) “As someone who’s relatively new to steroids, I found Sustaxyl 350 to be very effective for my lean muscle gains. I’ve noticed significant improvements in muscle definition without the bloating that comes with some other steroids. The injection every three weeks regimen works great for me.”
  • Rick S. (Professional Athlete) “Sustaxyl 350 has been a staple in my prep for competition for over a year now. It provides the muscular endurance and recovery I need to train twice a day. It’s a game-changer for maintaining peak performance throughout the season.”


Sustaxyl 350 is designed for sustained release, which effectively maintains optimal testosterone levels. This leads to enhanced muscular endurance, rapid strength gains, and significant muscle mass increases. Users report feeling more vigorous and capable of handling intensive training sessions with reduced recovery times.

Usage Guidelines

Typically, Sustaxyl 350 is injected once a week due to its mixed ester composition, providing a steady release that maintains testosterone levels. Dosage can vary based on the user’s experience, ranging from 350 mg to 700 mg per week, with cycles lasting from 8 to 12 weeks, followed by proper post-cycle therapy.

Sustaxyl 350 Lab Test Results

Potential Side Effects

While Sustaxyl 350 is effective, it can also lead to typical testosterone-related side effects such as increased body hair, acne, mood swings, and potential fluctuations in libido. More serious health risks can involve cholesterol level changes and liver strain, thus regular monitoring and responsible usage are advised.


Sustaxyl 350 by Kalpa Pharmaceuticals is a powerful and reliable option for those seeking significant performance and physique enhancements. User testimonials highlight its effectiveness and versatility, making it a popular choice among both novice and experienced steroid users. Always ensure to use under the guidance of health professionals to optimize benefits and minimize potential risks.

Jeffrey Compo

Jeffrey Compo stands out as a leading authority in the field of injectable anabolic steroids and peptides. With a PhD in Pharmacology, Jeffrey combines his scientific expertise with practical experience to enhance athletic performance safely and effectively. As a prolific author and meticulous reviewer in the steroid community, he contributes significantly to both academic and practical understanding of performance enhancements.