What are the key benefits of Core Labs M-Sten?

M-STEN supports rapid increases in body weight, muscular fullness, strength output, and overall training performance. Users commonly report noticeable improvements in body weight, recovery between workouts, training intensity, and physical appearance.

How should Core Labs M-Sten be taken?

Take 1 capsule once daily, preferably with a meal. Do not exceed 1 capsule per 24-hour period. Typical usage cycle is up to 4–5 weeks, followed by a planned break or structured transition phase. Post-cycle therapy (PCT) is required after completing the cycle.

Who is Core Labs M-Sten designed for?

M-STEN is designed for experienced bodybuilders and strength athletes who are pursuing aggressive muscle-building goals. It is not suitable for beginners, women, or individuals with pre-existing medical conditions.

Is M-Sten suitable for beginners?

No. Core Labs M-STEN is a high-potency prohormone intended exclusively for experienced users. Beginners should not use this product without a solid foundation in structured supplementation and cycle management.

Can M-Sten be used during bulking?

Yes, M-STEN is primarily selected during dedicated bulking phases where the objective is maximising size, strength, and gym performance. It is best paired with a structured training programme and adequate caloric surplus.

What are the ingredients in Core Labs M-Sten?

The key ingredient is M-STEN (2,17α-dimethyl-5α-androsta-1-en-17β-ol-3-one) at 10mg per capsule. Always use on-cycle liver support such as TUDCA or Milk Thistle during the cycle, as M-STEN can be hepatotoxic.

Are there any safety considerations or side effects?

M-STEN can be hepatotoxic, so on-cycle liver support (e.g., TUDCA or Milk Thistle) is essential. Regular blood work to monitor liver enzymes, lipid profiles, and hormone levels is strongly recommended. Consult a qualified healthcare professional before starting use.

Where can I buy Core Labs M-Sten in the UK?

Core Labs M-Sten is available through Cross The Limits, an authorised UK retailer. Orders placed before 4pm are dispatched the same day, with free UK shipping on orders over £89.

Core Labs X M-STEN 60 caps

Name: Core Labs X M-STEN 60 caps
Brand: Core Labs
SKU: 12928
Price: 44.46 GBP
Availability: InStock

Core Labs M-STEN – Extreme Mass Builder

What Is Core Labs M-STEN?

Core Labs M-STEN is an advanced prohormone designed for experienced bodybuilders and strength athletes pursuing aggressive muscle-building goals. Featuring 10 mg of M-STEN (2,17α-dimethyl-5α-androsta-1-en-17β-ol-3-one) per capsule, this formula has earned a reputation among hardcore users for supporting rapid increases in body weight, muscular fullness, strength output, and overall training performance.

Unlike products focused solely on lean gains, M-STEN is often chosen during dedicated bulking phases where the primary objective is maximizing size, strength, and gym performance. Many users report noticeable increases in body weight, improved recovery between workouts, enhanced training intensity, and a fuller, denser appearance when combined with a structured nutrition and resistance training program.

To complement the active ingredient, Core Labs includes 350 mg NAC (N-Acetyl L-Cysteine) and Vitamin E (TPGS) in every serving, creating a more complete formula for advanced supplementation protocols.

How Does M-STEN Work?

M-STEN belongs to a class of highly anabolic compounds favored by experienced physique athletes seeking substantial off-season growth. Within bodybuilding communities, M-STEN is known for supporting:

Rapid increases in muscle size and body weight

Significant improvements in strength and power output

Enhanced training intensity and workout performance

Greater muscle fullness and dense muscular appearance

Improved recovery capacity between demanding sessions

Accelerated progress during dedicated mass-gaining phases

Many users describe M-STEN as one of the more potent mass-focused prohormones available, making it a popular option for individuals looking to break through stubborn plateaus and achieve new levels of muscular development.

Key Ingredients

Ingredient
Amount Per Capsule

NAC (N-Acetyl L-Cysteine)
350 mg

M-STEN
10 mg

Vitamin E (TPGS)
10 mg

Suggested Use

Take 1 capsule once daily, preferably with a meal.

Do not exceed 1 capsule per 24-hour period.

Typical usage cycle: up to 4–5 weeks, followed by a planned break or structured transition phase in line with your supplementation strategy.

DOSAGE-TIMING-FALLOW-UP:

Daily Intake: Take one capsule daily with a meal to enhance absorption.
Cycling: It is generally recommended to limit prohormones like M-STEN to short cycles
An example cycle might be:
On-Cycle Duration:4-6 weeks of continuous use.
Off-Cycle Break: At least 4-6 weeks off to allow your body to recover.

Post-Cycle Therapy (PCT)

PCT Duration n: Begin PCT immediately after the on-cycle ends and continue for 4-6 weeks.
PCT: The goal is to restore the body’s natural hormone production and mitigate any side effects from hormonal imbalances caused by the prohormone.
PCT supplements may include natural testosterone boosters, estrogen blockers, and liver support supplements. Specific compounds can consist of:
Natural Testosterone Boosters: Fenugreek, Tribulus Terrestris, D-Aspartic Acid.
Estrogen Blockers: Aromatase inhibitors to prevent the conversion of testosterone to estrogen.
Liver Support: NAC (already included in the product), Milk Thistle, or TUDCA.

On-Cycle Support (Protectives)

Liver Support: Even though NAC is included in the product, additional liver support may be beneficial.
Blood Pressure and Cholesterol Management: To support cardiovascular health, consider supplements like Omega-3 fatty acids, CoQ10, or Red Yeast Rice.
Joint Support: If experiencing joint discomfort, glucosamine and chondroitin can be beneficial.

Duration of Use

Total Duration To prevent undue stress on the body, exceeding two cycles per year. Is not recommended

Core Labs M-Sten – Warnings and Precautions

Always consult with a healthcare professional before starting any new supplement, especially one that affects hormone levels.
Regular blood work is recommended to monitor health markers such as liver enzymes, lipid profiles, and hormone levels.
Pay close attention to your body’s reactions to the supplement and discontinue use if you experience adverse effects.

Disclaimer: This product is a dietary supplement and should not be used as a substitute for a varied diet. Do not exceed the recommended daily dose. Keep out of reach of children. If you are pregnant, nursing, taking medication, or have a medical condition, consult your healthcare professional before use. This product contains Aphrodyne and may cause side effects such as increased heart rate, anxiety, or elevated blood pressure. Use with caution and discontinue use if any adverse reactions occur. Store in a cool, dry place away from direct sunlight. The Food and Drug Administration or any other governmental authority has not evaluated the statements made here. This product is not intended to diagnose, treat, cure, or prevent any disease.