S-23 10mg

Selective Androgen Receptor Modulator (SARM) | 100 Tablets × 10mg

Product Name: S-23
CAS Number: 1010396-29-8
Molecular Formula: C₁₈H₁₃ClF₄N₂O₃
Molecular Weight: 416.76 g/mol
Purity: ≥99% (verified by HPLC & Mass Spectrometry)
Appearance: White to off-white pressed tablets
Packaging: Sold as 100 tablets × 10mg (1000mg / 1g total) in sealed pharmaceutical-grade bottle

Product Overview

S-23 is a high-affinity, non-steroidal Selective Androgen Receptor Modulator (SARM) originally developed by GTx, Inc. as part of research into male hormonal contraception and androgen-dependent conditions. Among the SARM family, S-23 is widely regarded as one of the most potent and tissue-selective compounds available for research, demonstrating strong anabolic activity in muscle and bone tissue with minimal effects on the prostate and other androgen-sensitive organs.

Each bottle contains 100 precision-pressed tablets, each containing 10mg of S-23, ensuring accurate and consistent dosing for laboratory research protocols.

Mechanism of Action

S-23 functions as a full agonist at the androgen receptor (AR), binding with extremely high affinity and selectivity. Unlike traditional anabolic steroids, S-23 produces tissue-selective effects, primarily activating androgen receptors in skeletal muscle and bone while sparing other tissues. In preclinical research models, S-23 has been observed to:

• Strongly increase lean muscle mass
• Improve bone mineral density and skeletal strength
• Reduce adipose (fat) tissue
• Suppress spermatogenesis (basis for male contraceptive research)
• Demonstrate higher binding affinity than most other known SARMs

Research Applications

• Muscle hypertrophy and anabolic pathway studies
• Bone density and osteoporosis research models
• Male hormonal contraception investigations
• Body composition and lean mass research
• Androgen receptor binding affinity studies
• Tissue-selective androgen signaling research
• Hormone replacement therapy (HRT) alternative modeling

Comparison: S-23 vs. Other SARMs

S-23 is often considered the strongest SARM in terms of pure anabolic potency and androgen receptor binding affinity. Compared to popular SARMs like Ostarine (MK-2866), Ligandrol (LGD-4033), and RAD-140 (Testolone), S-23 demonstrates:

• Higher AR binding affinity than LGD-4033 and Ostarine
• Greater anabolic-to-androgenic ratio in muscle vs. prostate tissue
• Oral bioavailability of ~96% in preclinical models
• Half-life of approximately 12 hours, supporting once or twice daily dosing protocols
• Stronger suppression profile — a key factor in male contraceptive research

Storage & Handling

Storage: Store in a cool, dry place away from direct sunlight, ideally at room temperature (15–25°C).
Shelf Life: 24 months from manufacture date when stored in the original sealed container.
Handling: Keep bottle tightly sealed. Avoid exposure to moisture and heat. Wear appropriate PPE during handling. Keep out of reach of unauthorized persons.

Product Contents

• 100 × 10mg precision-pressed S-23 tablets
• Sealed pharmaceutical-grade bottle with tamper-evident cap
• Desiccant pack for moisture control
• Batch-specific lot number and expiration date
• Certificate of Analysis (COA) available upon request

Quality Assurance

Every batch is independently third-party tested for purity, identity, content uniformity, and consistency. HPLC and Mass Spectrometry reports are available with your order. Manufactured in an ISO-certified facility under strict GMP-aligned standards to ensure tablet-to-tablet dosing accuracy and batch reliability.

Key Research Highlights

• Highest potency SARM — Often cited as the most anabolic SARM in research literature
• Non-steroidal — Does not aromatize to estrogen or convert to DHT
• Tablet format — Pre-dosed for convenience and consistency in research protocols
• Bulk value — 100-tablet bottle offers long-term supply for ongoing studies
• Well-characterized — Extensively documented in preclinical research publications