S-4 (Andarine)

S-4, also known as Andarine, is a powerful Selective Androgen Receptor Modulator (SARM) developed to address conditions such as muscle wasting, osteoporosis, and age-related muscle loss. Among the SARMs family, S-4 is widely recognized for its ability to support lean muscle preservation, fat loss, and strength improvement.

For researchers, S-4 is especially valuable due to its cutting and recomposition potential, making it a top choice for studies focused on fat reduction while maintaining lean tissue.

What is S-4 (Andarine)?

S-4 (Andarine) is a non-steroidal oral SARM that binds selectively to androgen receptors in muscle and bone tissue. Unlike anabolic steroids, it does not convert to estrogen or DHT, which means fewer hormonal side effects.

It was initially developed by GTX Inc. for therapeutic use in muscle wasting diseases and osteoporosis, and has since gained strong interest in scientific and athletic research.

Key Features

• Compound Name: S-4 (Andarine)

• Category: Selective Androgen Receptor Modulator (SARM)

• Form: Oral (capsules, tablets, or liquid solution)

• Half-Life: ~4–6 hours (multiple daily dosing often required)

• Legality: For research use only (not FDA-approved for human use)

Benefits of S-4 (Andarine) in Research

• 💪 Muscle Preservation: Helps maintain lean mass during calorie restriction.

• 🔥 Fat Reduction: Popular in studies on fat loss and body recomposition.

• ⚡ Strength Gains: Increases strength and endurance levels.

• 🦴 Bone Health: Supports bone density and reduces risk of fractures.

• 🧬 Selective Targeting: Minimal impact on prostate and other organs.

• 🚫 Non-Steroidal Alternative: Provides anabolic effects without steroid-related side effects.

Potential Research Applications

• Treatment of muscle wasting disorders

• Support in osteoporosis studies

• Research into age-related muscle decline

• Studies on body recomposition (muscle retention + fat loss)

Possible Side Effects

While S-4 is generally considered safer than anabolic steroids, researchers have reported potential side effects:

• Visual disturbances (yellow/green tint or difficulty adjusting to darkness – dose related)

• Mild testosterone suppression

• Temporary fatigue or headaches

• Changes in cholesterol levels

⚠️ Side effects are typically dose-dependent and reversible after discontinuation.

Recommended Dosage (For Research Purposes Only)

• Dosage Range: 25–50 mg daily (divided into 2–3 doses due to short half-life)

• Cycle Duration: 6–8 weeks

• Stacking Options: Often stacked with Ostarine (MK-2866), LGD-4033, or RAD-140 for cutting and recomposition research.

Storage Guidelines

• Store in a cool, dry place away from sunlight.

• Keep tightly sealed to maintain purity.

• For laboratory and research purposes only.

Why Buy S-4 (Andarine) from Us?

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Purity Guarantee

Our S-4 is rigorously tested to ensure high purity and consistent results for all research applications.