Product Description

Andarine S4

Andarine S4, also known as S-40503 or GTx-007, is a popular Selective Androgen Receptor Modulator (SARM). It was originally developed to treat conditions like muscle wasting, osteoporosis, and benign prostatic hyperplasia. Today, it is widely used in bodybuilding and fitness communities for its ability to promote lean muscle growth and fat loss with fewer androgenic side effects than traditional anabolic steroids.

What is Andarine S4?

Andarine S4 is a non-steroidal SARM that selectively binds to androgen receptors in muscle and bone tissue. Unlike steroids, it aims to provide anabolic benefits while minimizing impact on organs like the prostate, hair follicles, and sebaceous glands. It is typically available in liquid form or capsules, with a relatively short half-life of 4–6 hours.

Key reported benefits include:

• Increased lean muscle mass
• Enhanced fat oxidation and body recomposition
• Improved bone density and strength
• Better vascularity and muscle hardness

Recommended Dosage and Administration

The typical dosage for Andarine S4 ranges from 25mg to 50mg per day, often split into 2–3 doses due to its short half-life. Beginners usually start at 25mg/day, while experienced users may go up to 50mg/day. Cycles generally last 6–8 weeks, followed by a break or post-cycle therapy (PCT).

It can be taken with or without food. Many users stack Andarine with other SARMs like Ostarine (MK-2866) or Cardarine (GW-501516) for enhanced cutting or recomp effects. Women typically use lower doses (10–15mg/day) to reduce the risk of virilization.

Potential Side Effects

While considered milder than steroids, Andarine S4 is well-known for its unique side effect: vision disturbances. Users often report a yellow tint to vision, difficulty seeing at night, and reduced visual acuity. These effects are usually dose-dependent and reversible after discontinuation.

Other possible side effects include:

• Testosterone suppression (mild to moderate)
• Headaches and fatigue
• Joint dryness
• Increased aggression or mood changes
• Mild liver enzyme elevation

Important Precautions and Warnings

Andarine S4 is not FDA-approved and is sold strictly for research purposes. It is banned by WADA and most sporting organizations. Long-term safety data is limited. Regular blood work is strongly recommended to monitor hormone levels, liver function, and lipid profile.

It is contraindicated for individuals under 21, pregnant or breastfeeding women, and those with pre-existing liver, heart, or vision conditions. Proper post-cycle therapy (PCT) is advised after longer or higher-dose cycles.

Andarine S4 Pricing

A 30ml bottle (typically 25mg/ml or 50mg/ml) usually costs between $40–$80. Capsule versions (60 capsules at 25mg) range from $50–$90 depending on the brand and supplier. Research-grade products vary significantly in price and quality.

Important Disclaimer: This information is for educational purposes only and is not medical advice. Andarine S4 is an investigational compound not approved for human consumption. Misuse can lead to serious health risks, including hormonal imbalance and vision problems. It is illegal to use for performance enhancement in many countries. Always consult a qualified healthcare provider before considering any SARM or research chemical. Individual responses and risks vary significantly.