Single bottle of CORE SARMS S23 Mastorine, 10mg, 60 capsules
Lab Tested 10mg Pure

S-23 (SARM)

Selective Androgen Receptor Modulator

£45.00

What’s Included

  • tick-icon60 capsules per bottle
  • tick-icon10mg pure S23 per capsule
  • tick-icon2-month supply (1 cap daily)
  • tick-iconThird-party lab certificate included

Safe & Secure 3D Checkout

Lab Tested

Lab Tested

Third-party verified

Fast Shipping

Fast Shipping

3-5 business days

24/7 Support

24/7 Support

Expert guidance

Product Description

S23 SARM is one of the most potent SARMs available, known for its exceptional ability to promote lean muscle growth while simultaneously supporting fat loss. Originally developed for muscle-wasting conditions, S23 has become the choice for experienced users seeking dramatic body recomposition.

Our premium S23 SARM is manufactured to pharmaceutical standards and undergoes rigorous third-party testing. Each capsule contains 10mg of pure S23, delivering powerful anabolic effects with minimal side effects when used responsibly.

22 reviews for S-23 (SARM)

  1. Roman Kozlov

    It did something

  2. Alex Patterson

    decent decent

  3. Owen Wallace

    Good

  4. Paul Jenēn

    Fast delivery to germany in just 2.5 days

  5. Scott Marino

    vascularity on point with it

  6. Paul Jensen

    Fast delivery to germany in just 2.5 days

  7. Jared Kim

    Love it!

  8. Wesley Grant

    Bro. I just wanted to gain muscle mass, but I also lost a crap ton of fat.

  9. Ivan Petrov

    GOAT

  10. Robert Mitchell

    When I ran it, I thought it would be better to split 10mg into two doses so it would be a little bit milder. It gave some basic enhancements like strength and a drier look, but the one thing that stood out was that while in the gym, I felt super motivated, a lot more than usual. One thing that people should be aware of is the suppression, but in my opinion its not that bad if you take the compound right. Overall liked it very much, would def try it again.

  11. Mitchell B. Cooper

    Muscles became “hard”, don’t know how to explain that…

  12. Thomas Mitchell

    I took 10mg once day and it worked great

  13. Brendon Sparrow

    this one earned a spot with me

  14. George Edmund

    Good product

  15. Lorn Johnathan

    Im coming back for this one for sure

  16. Randolph Stewar

    favorite one yet..

  17. Stace Pip

    Honestly impressed, and that’s rare coming form my mouth

  18. Jaquan R.

    Great!

  19. Dewitt Devin

    Didn’t expect it to hit this well

  20. Hobson Emmerson

    When I ran it, I thought it would be better to split 10mg into two doses so it would be a lil bit milder. It gave some basic enhancements like strength and drier look, but the one thing that stood out was that while in the gym I felt super motivated, a lot more than usual. One thing that people should be avare of is the suppression but in my opinion its not that bad if you take the compound right. Overall liked it very much would def try it again.

  21. Everard Makenzie

    S23 has been intensse in the best way. My strength shot up and my workouts feel incredibly powerful

  22. Callum Blackburn

    Great results. Only thing is that my vision got a bit yellowy, but it returner back to normal once I finished it

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What are the Key Benefits of S-23 (SARM)?

Lean muscle gains

Lean muscle gains

Enhanced strength

Enhanced strength

Accelerated fat loss

Accelerated fat loss

Improved muscle hardness

Improved muscle hardness

Better vascularity

Better vascularity

Enhanced recovery

Enhanced recovery

Ingredients & Dosage

Active Ingredients

S23 SARM

10mg

Selective androgen receptor modulator

Black Pepper Fruit Extract (Piper nigrum)

5mg

Enhances absorption and bioavailability

Purity & Quality

Third-party lab tested Third-party lab tested
99.2%+ purity guaranteed 99.2%+ purity guaranteed
24-month shelf life 24-month shelf life

How Does S-23 (SARM) Work?

S23 SARM works by binding to androgen receptors with high affinity and selectivity, particularly in muscle and bone tissue. This selective binding promotes strong anabolic effects while minimizing unwanted side effects in other tissues.

The compound increases protein synthesis and nitrogen retention while simultaneously supporting fat oxidation, making it ideal for body recomposition goals. S23’s unique properties allow users to build lean muscle while losing fat, creating a harder, more defined physique.

With a half-life of 12 hours, S23 SARM provides sustained anabolic support when taken twice daily, making it highly effective for experienced users.

Key Actions

1 High-affinity androgen receptor binding
2 Promotes protein synthesis
3 Supports fat oxidation

How to Use S-23 (SARM)?

Dosage

Dosage

10mg once daily

Timing

Timing

Take with morning meal

Cycle Length

Cycle Length

6-8 weeks followed by 4-week break

Important

Important

Dietary supplement use only

Important Notes

Recommended for experienced users only. Start with lower doses to assess tolerance.

Looking for something else?

Are you looking for products that support recovery and healing? Explore other options and see Ostarine (MK-2866) available at CORE SARMS.

Frequently Asked Questions

S23 is a potent, selective androgen receptor modulator designed for advanced users seeking significant muscle growth and fat loss.

S23 is recommended for experienced users who have completed cycles with milder SARMs like Ostarine or Ligandrol first.

Users typically experience significant lean muscle gains, enhanced strength, improved muscle hardness, and accelerated fat loss.

Potential effects include testosterone suppression, mild fatigue, or temporary mood changes. Side effects vary with dose and cycle length.

S23 can be stacked with other SARMs, but due to its potency, careful consideration of dosages and cycle length is important.

S23 is a powerful Selective Androgen Receptor Modulator (SARM) designed to increase lean muscle mass, strength, and endurance while helping reduce body fat. It’s considered one of the most potent SARMs available, known for delivering visible muscle hardening and performance improvements within a short period.

S23 is commonly used to enhance muscle growth, boost strength, and improve body composition. Many advanced fitness enthusiasts and athletes use it for cutting or recomposition phases, as it helps preserve lean muscle while promoting fat loss and definition.

S23 works by binding strongly to androgen receptors in muscle and bone tissue, stimulating protein synthesis and muscle development. Unlike anabolic steroids, it acts selectively, focusing on muscle-building benefits while minimizing unwanted effects on other organs or tissues.

Most users begin to see results within 2–3 weeks, with noticeable improvements in muscle definition, strength, and endurance as the cycle progresses. Optimal results are usually achieved after 6-8 weeks of consistent use, combined with proper diet and training.

Customer Reviews

4.91 out of 5 (22 reviews)
Callum Blackburn
2026-01-24

Great results. Only thing is that my vision got a bit yellowy, but it returner back to normal once I finished it

Everard Makenzie
2026-01-23

S23 has been intensse in the best way. My strength shot up and my workouts feel incredibly powerful

Hobson Emmerson
2026-01-22

When I ran it, I thought it would be better to split 10mg into two doses so it would be a lil bit milder. It gave some basic enhancements like strength and drier look, but the one thing that stood out was that while in the gym I felt super motivated, a lot more than usual. One thing that people should be avare of is the suppression but in my opinion its not that bad if you take the compound right. Overall liked it very much would def try it again.

Write a Review


S-23 (SARM)

S-23 (SARM)

£45.00
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