 
 
 
 
 
 
CLASSIFICATION: SELECTIVE ANDROGEN RECEPTOR MODULATOR 
 ACTIVE SUBSTANCE: MASTORIN
 FORM: 100 PILLS x 10 MG
 ACTIVE HALF-LIFE: ~ 12 HOURS
 DOSAGE: MEN 10-20 MG/DAY
 ACNE: N/A
 WATER RETENTION: N/A
 HIGH BLOOD PRESSURE (HBP): N/A
 HEPATOTOXICITY: N/A
 AROMATIZATION: N/A
 MANUFACTURER: DRAGON PHARMA
LABORATORY TESTED: VIEW LAB RESULTS
DragonPharma.Net is a verified distributor of Dragon Pharma SARMs. We offer authentic S 23 (Mastorin) 10 mg tablets with fast USA domestic (2–5 days) and international (7–21 days) shipping. Backed by lab-tested purity, this SARM is ideal for advanced users targeting extreme definition and strength.
S 23, also known as Mastorin, is a selective androgen receptor modulator (SARM) designed to bind with high affinity to androgen receptors in muscle and bone. It's particularly known for promoting muscle hardness, vascularity, and fat loss—making it a popular choice during cutting phases or pre-contest preparation. Compared to other SARMs like Ostarine (MK 2866) or Ligandrol (LGD 4033), S 23 is significantly more suppressive and potent.
Most users cycle S 23 at 10–20 mg/day for 6 to 8 weeks. Due to its half-life (~12 hours), split dosing may help maintain more stable blood levels. It is commonly stacked with other SARMs such as Cardarine (GW501516) for enhanced endurance and fat loss synergy. Because of its powerful binding affinity, this compound is best suited for experienced users.
S 23 is non-aromatizing, so there is no water retention or gynecomastia risk. However, its strong androgenic nature means virilization in women is highly likely—this compound is not recommended for female use.
Following a cycle of S 23, post-cycle therapy is essential. We recommend starting Clomid (50 mg/day) or Nolvadex (20 mg/day) for 4 weeks to restore natural testosterone production. Visit our Post-Cycle Therapy category for additional hormonal recovery options.
| Week | S 23 | Optional Add-ons | 
|---|---|---|
| 1–4 | 10–20 mg/day | GW501516 (10–20 mg/day) | 
| 5–8 | 10–20 mg/day | Continue support or add LIV 52 | 
| 9–12 | PCT | Clomid / Nolvadex | 
S 23 is a selective androgen receptor modulator (SARM) used during cutting cycles to promote lean muscle growth, strength, and fat loss without water retention.
Typical doses range from 10 to 20 mg per day for 6–8 weeks. Beginners should start at 10 mg/day to assess tolerance.
Yes, S 23 is suppressive and requires PCT using Clomid or Nolvadex to restore testosterone production.
S 23 is not recommended for women due to its strong androgenic properties and high risk of virilization.
You can buy lab-tested Dragon Pharma S 23 from our trusted store with fast USA domestic or international shipping.
S 23 (Mastorin) by Dragon Pharma is one of the most potent SARMs for cutting, strength enhancement, and body recomposition. It offers dry gains without estrogenic side effects but requires post-cycle support due to its suppressive nature. Use responsibly and consult with a professional before beginning your cycle.
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CLASSIFICATION: GROWTH HORMONE SECTRETAGOGUE 
 ACTIVE SUBSTANCE: IBUTAMERON
 FORM: 100 PILLS x 25 MG
 ACTIVE HALF-LIFE: ~ 24 HOURS
 DOSAGE: MEN 20-30 MG/DAY
 ACNE: RARE
 WATER RETENTION: MILD
 HIGH BLOOD PRESSURE (HBP): N/A
 HEPATOTOXICITY: N/A
 AROMATIZATION: N/A
 MANUFACTURER: DRAGON PHARMA
LABORATORY TESTED: VIEW LAB RESULTS
 
CLASSIFICATION: SELECTIVE ANDROGEN RECEPTOR MODULATOR
 ACTIVE SUBSTANCE: LIGANDROL
 FORM: 100 PILLS x 15 MG
 ACTIVE HALF-LIFE: 24–36 HOURS
 DOSAGE: 5–10 MG/DAY
 ACNE: LOW
 WATER RETENTION: NO
 HIGH BLOOD PRESSURE (HBP): RARE
 HEPATOTOXICITY: LOW
 AROMATIZATION: NO
 MANUFACTURER: DRAGON PHARMA
LABORATORY TESTED: VIEW LAB RESULTS
 
CLASSIFICATION: SELECTIVE ANDROGEN RECEPTOR MODULATOR
 ACTIVE SUBSTANCE: OSTARINE
 FORM: 100 PILLS x 25 MG
 ACTIVE HALF-LIFE: ~ 24 HOURS
 DOSAGE: MEN - 20-30 MG/DAY
 ACNE: RARE
 WATER RETENTION: NONE
 HIGH BLOOD PRESSURE (HBP): NO
 HEPATOTOXICITY: NO
 AROMATIZATION: NO
 MANUFACTURER: DRAGON PHARMA
LABORATORY TESTED: VIEW LAB RESULTS
 
CLASSIFICATION: SELECTIVE ANDROGEN RECEPTOR MODULATOR 
 ACTIVE SUBSTANCE: YK 11
 FORM: 100 PILLS x 10 MG
 ACTIVE HALF-LIFE: 6-10 HOURS
 DOSAGE: MEN 10-20 MG/DAY
 ACNE: POSSIBLE
 WATER RETENTION: NONE
 HIGH BLOOD PRESSURE (HBP): UNLIKELY
 HEPATOTOXICITY: LOW
 AROMATIZATION: NO
 MANUFACTURER: DRAGON PHARMA
LABORATORY TESTED: VIEW LAB RESULTS
 
CLASSIFICATION: PPAR RECEPTOR AGONIST
 ACTIVE SUBSTANCE: CARDARINE
 FORM: 100 PILLS x 20 MG
 ACTIVE HALF-LIFE: ~16–24 HOURS
 DOSAGE: 10–20 MG/DAY
 ACNE: NO
 WATER RETENTION: NO
 HIGH BLOOD PRESSURE (HBP): NO
 HEPATOTOXICITY: LOW
 AROMATIZATION: NO
 MANUFACTURER: DRAGON PHARMA
LABORATORY TESTED: VIEW LAB RESULTS
October 16, 2024
With S 23, my physique changed quickly, and my energy levels remained high. I achieved consistent muscle gains and improved my overall focus during training.