MASS (S4)
$149.00
Ships from Australia | Discreet packaging
13 in stock
| Bulk Discount | Number of Items | Discount |
|---|---|---|
| Bulk Discount | 2 | 5% $141.55 |
| Bulk Discount | 3 | 10% $134.10 |
| Bulk Discount | 4 | 15% $126.65 |
| Bulk Discount | 5 | 20% $119.20 |
MASS (S4) – Potent SARM for Strength, Lean Muscle & Fat Loss
MASS (S4), also known as Andarine, is a highly potent Selective Androgen Receptor Modulator (SARM) designed to promote lean muscle retention, fat reduction, and enhanced vascularity. It functions as a partial agonist of androgen receptors, allowing it to provide muscle-building benefits without the negative side effects associated with traditional anabolic steroids.
Unlike testosterone and steroids, MASS (S4) does not exhibit androgenic activity in non-skeletal muscles, meaning it has minimal impact on the prostate, hairline, or other hormone-sensitive tissues. Its powerful anabolic properties make it an excellent choice for cutting, recomposition, and strength enhancement.
How MASS (S4) Works
MASS (S4) is a research compound studied for its selective interaction with androgen receptors in muscle and bone tissue. This targeted activity has made it a popular focus in research involving lean muscle support, strength, and physique refinement, particularly during cutting and recomposition protocols.
Key Benefits of MASS (S4)
Lean Muscle Retention – Prevents muscle loss while in a caloric deficit.Fat Burning Support – Enhances metabolic rate and promotes fat elimination.Strength & Vascularity – Increases power output and produces a harder, more defined look.Minimal Side Effects – Unlike traditional steroids, does not impact non-skeletal muscle tissues.Orally Active – Convenient dosing with no injections required.
Why Choose MASS (S4)?
MASS (S4) is often chosen in research settings for its reputation in supporting lean muscle retention, improved definition, and a harder overall physique. Its balanced profile makes it a strong option for those exploring compounds linked to body recomposition and performance-focused outcomes.
Take your research to the next level with MASS (S4) – a versatile compound for lean muscle support, strength, and physique refinement.
Recommended Combinations
- For Endurance & Performance → Stack with MELT (SR-9011) at 20mg/day to boost stamina and energy.
- For Cutting & Fat Loss → MASS (S4) + MELT (SR-9011) (20mg/day) = A highly effective cutting stack.
- As Part of a Steroid Cycle → MASS (S4) enhances strength and lean muscle mass when stacked with an anabolic steroid cycle.
- As a Standalone Compound → MASS (S4) at 50mg/day can increase strength and lean muscle rapidly with noticeable improvements in 1-2 weeks.
- For Lean Gains & Fat Loss → Combine MASS (S4) + SHRED (GW-0742) + GAIN (LGD-4033) for lean muscle and fat loss simultaneously.
Dosage Instructions
- Concentration: 50mg/mL
- Volume: 30mL
- Suggested Dosage: 50mg (1mL) per day for 6-8 weeks.
- Each bottle lasts: 30 days at 1mL per day.
Storage Instructions
- Store in a cool, dark place, such as a cupboard or pantry, to maintain potency.
Ingredients / Purity Report
- Active Ingredient: MASS (S4) – (2S)-3-(4-acetamido-phenoxy)-2-hydroxy-2-methyl-N-(4-nitro-3-trifluoromethyl-phenyl)-propionamide
- Other Ingredients: Food-grade propylene glycol, ethyl alcohol, and peppermint oil.
- Purity Analysis: Contact sales@auslabs.email for the latest HPLC purity report.
Medical References
- Schragl, K. M., Enev, V. S., Gaertner, P., Forsdahl, G., & Gmeiner, G. Novel pathway for the synthesis of arylpropionamide-derived selective androgen receptor modulator (SARM) metabolites of andarine and ostarine. Tetrahedron Letters, vol. 54, no. 18, pp. 2239–2242.
- PubMed (2016). Investigation of the selective androgen receptor modulators S1, S4, and S22 and their metabolites in equine plasma using high-resolution mass spectrometry. PubMed
- De Rijke (2017). Selective androgen receptor modulators: in vitro and in vivo metabolism and analysis. PubMed
Disclaimer
No statements made on this page have been evaluated the Therapeutic Goods Administration (TGA). This product is not intended to diagnose, treat, cure, or prevent any disease or illness. MASS (S4) is strictly for research purposes only. Please refer to the TERMS OF USE for more information.




