Xeno Labs Masteron – 100mg/10ml
✓ Extreme Muscle Hardness – Get granite-hard, dense muscle definition
✓ Zero Water Retention – Stay completely dry and shredded
✓ Anti-Estrogenic Properties – Acts as mild AI while hardening physique
✓ Perfect for Contest Prep – The #1 compound for final weeks before stage
✓ Enhanced Vascularity – Roadmap veins and paper-thin skin
Original price was: $69.90.$64.90Current price is: $64.90.
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Why You Should Buy Xeno Labs Masteron – 100mg/10ml at Steroiduck?
What It Does
Masteron 100 contains Drostanolone Propionate at 100mg per ml – a pure DHT derivative famous for producing extreme muscle hardness and definition without any water retention. Originally developed for breast cancer treatment, Masteron became the go-to compound for competitive bodybuilders seeking contest-ready conditioning and hardness.
When you inject Masteron, it doesn’t build new muscle mass – instead, it dramatically enhances the appearance of existing muscle by removing subcutaneous water, increasing density, and creating a harder, more defined look. The compound also has anti-estrogenic properties, helping control estrogen while on cycle.
The propionate ester has a 2-3 day half-life, meaning you inject every other day or daily for stable blood levels. Within 1-2 weeks, you’ll notice increased muscle hardness, enhanced definition, visible veins appearing, and a drier, tighter physique. Masteron doesn’t produce dramatic changes – it refines and perfects.
Extreme Muscle Hardness and Density
Masteron’s #1 effect – it makes muscles incredibly hard, dense, and granite-like. The hardening effect is unmatched by other compounds. Your muscles feel fuller and harder simultaneously. This makes Masteron essential for final contest prep weeks when maximum hardness is critical.
Completely Dry – Zero Water Retention
Masteron cannot aromatize to estrogen – it’s chemically impossible. You get absolutely zero water retention. Every ounce of weight you see is muscle tissue. Your physique stays dry, hard, and defined throughout. This makes it perfect for cutting when you want to eliminate every bit of water under the skin.
Anti-Estrogenic Effects
Masteron acts as a mild aromatase inhibitor, helping control estrogen from other compounds in your stack. Many users reduce or eliminate AI when running Masteron. It provides protection against gyno and water retention from aromatizing compounds like testosterone.
Enhanced Muscle Definition and Separation
Masteron enhances muscle definition and separation better than almost any compound. You see individual muscle striations, clear separation between muscle groups, and enhanced detail. The conditioning effect makes you look significantly leaner even at the same body fat percentage.
Increased Vascularity
Prominent veins appear across shoulders, arms, chest, and abs. The dry effect combined with increased hardness makes vascularity pop dramatically. The vascular look stays visible throughout your cycle and into PCT.
Maintains Strength While Cutting
Unlike many cutting compounds, Masteron helps maintain strength even in calorie deficit. Many users report feeling strong and full in the gym despite eating low calories. This helps preserve muscle tissue during aggressive cuts.
Mild Androgenic Benefits
As a pure DHT derivative, Masteron provides mild androgenic benefits – increased aggression in gym, enhanced libido, improved mood and confidence. These psychological benefits help during difficult cutting phases.
No Liver Toxicity
Masteron is completely non-toxic to liver. You can run it for extended periods without organ damage concerns. This makes it safe for long contest prep cycles.
FDA DISCLAIMER: This product isn’t intended to diagnose, treat, cure, or prevent any disease. Drostanolone Propionate is a controlled substance and should only be used under proper medical supervision for legitimate medical purposes.
Recommended Dosage for Male:
300-600mg per week split into frequent injections. Beginners start with 300-400mg weekly. Intermediate users run 400-500mg weekly. Advanced users and competitors go to 500-600mg weekly.
Recommended Dosage for Female:
50-100mg per week for women who choose to use it. Start at 50mg weekly and monitor closely for virilization. Masteron has moderate to high virilization risk due to DHT nature. Many women prefer less androgenic options.
Injection Frequency:
Every other day or daily injections required due to 2-3 day half-life. Example: For 400mg weekly, inject 100mg every other day (3.5x weekly) or 57mg daily. Most users prefer EOD protocol: Monday/Wednesday/Friday/Sunday rotation.
When to Inject:
Inject into muscle (glutes, thighs, delts, or even ventro glutes) using 1-1.5 inch needle. Rotate injection sites frequently due to injection frequency. Masteron propionate is very smooth with minimal PIP.
Cycle Duration:
8-12 weeks for optimal results. Most users run 10-12 weeks. Contest prep: Start 10-12 weeks out and run through show day. The short ester allows quick start and quick clearance post-cycle.
Stacking:
Always stack with testosterone base for best results. Classic cutting stack: 400mg Masteron weekly + 350-500mg Testosterone Propionate weekly + 50mg Anavar daily for extreme conditioning. Contest prep stack: 500mg Masteron + 350mg Testosterone + 350mg Trenbolone weekly for maximum hardness. Beginner cut: 300mg Masteron + 400mg Testosterone Enanthate weekly.
Post Cycle Therapy (PCT):
Required after cycle ends. Wait 3-4 days after last injection (propionate clears quickly), then start PCT: Nolvadex 40/40/20/20mg daily + Clomid 50/50/25/25mg daily for 4 weeks.
Most Common:
- Moderate testosterone suppression (similar to all steroids)
- Hair loss/shedding in those genetically predisposed (it's pure DHT)
- Increased aggression (usually manageable)
- Mild acne or oily skin
- Possible prostate enlargement with extended use
- Negative cholesterol impact (HDL decreases)
Serious Side Effects:
- Significant hair loss for those with male pattern baldness genetics
- Prostate issues in older users or those predisposed
- Cardiovascular strain from negative lipid changes
- Complete testosterone suppression
- High virilization risk for women
How to Manage:
Get blood work at week 6 checking testosterone, estradiol (should be controlled), cholesterol, and PSA (prostate). Use finasteride or dutasteride DOES NOT WORK with Masteron since it's already DHT - can't reduce it further. Accept hair loss risk if genetically predisposed. Do cardio 4x weekly. Take fish oil 4-6g daily for lipid support. Monitor prostate health.
Active Ingredient: Drostanolone Propionate (2α-methyl-DHT propionate ester)
Dosage Strength: 100 mg per 1 milliliter
Quantity: 10ml vial (1000mg total per vial)
Form: Injectable oil-based solution in sterile multi-dose vial
Intended Use:
Primary medical use: Originally developed for breast cancer treatment in women.
Primary bodybuilding use: Contest preparation, cutting cycles, muscle hardening, eliminating water retention, enhancing definition.
Classification: Pure DHT (dihydrotestosterone) derivative with 2α-methyl group, short-acting propionate ester
Mechanism of Action: Drostanolone is DHT with 2α-methyl group added for oral activity and anabolic enhancement. As pure DHT derivative, it cannot aromatize to estrogen (no aromatase enzyme substrate). Provides moderate anabolic effects with strong androgenic effects. Acts as weak competitive aromatase inhibitor. Enhances protein synthesis moderately. Primary benefit is cosmetic enhancement of existing muscle rather than building new tissue.
Half-Life: 2-3 days (short-acting propionate ester)
Detection Time: 3 weeks after last injection in drug testing
Bioavailability: High (oil-based intramuscular injection)
Anabolic/Androgenic Ratio: 62:25 (moderate anabolic, low androgenic on paper - feels more androgenic in practice)
Aromatization: None - Cannot convert to estrogen (chemically impossible)
DHT Conversion: Is already pure DHT derivative (no conversion needed)
Hepatotoxicity: None for injectable version (not C17-alpha alkylated)
Effects on Cholesterol: Moderate to significant negative impact. Reduces HDL by 25-40%. Increases LDL moderately.
Molecular Formula: C23H36O3
Molecular Weight: 360.53 g/mol
Administration: Deep intramuscular injection into glutes, thighs, deltoids, or ventro glutes. Use 1-1.5 inch needle. Inject every other day or daily for stable levels.
Storage: Store at room temperature (68-77°F or 20-25°C) away from light. Do not refrigerate. Do not freeze. Keep out of reach of children.
Also Known As: Masteron, Mast, Drostanolone, Drolban, Masterid
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