What is S4X (Andarine) by Helixx Labs?
Helixx Labs S4X contains Andarine (S4), a powerful selective androgen receptor modulator (SARM) developed to support lean muscle retention, strength enhancement, and fat loss without the side effects commonly associated with anabolic steroids.
Originally investigated for muscle-wasting diseases and osteoporosis, Andarine has gained popularity in the fitness and bodybuilding world due to its ability to promote muscle hardness, reduce body fat, and improve vascularity — making it especially effective for recomposition and cutting cycles.
Benefits of Andarine (S4)
- Enhances lean muscle retention during calorie deficits
- Improves muscle definition, hardness, and vascularity
- Accelerates fat loss while preserving strength
- Non-methylated and non-aromatizing (no estrogenic side effects)
- Rapid visual changes within the first 2–3 weeks
Product Details
- Compound: Andarine (S4)
- Brand: Helixx Labs – S4X
- Form: Oral capsules or liquid (depending on format)
- Standard Dose: 25–50 mg/day
- Cycle Length: 6–8 weeks
Recommended Usage
- Beginner Dose: 25 mg/day (split AM/PM)
- Standard Dose: 50 mg/day (25 mg AM, 25 mg PM)
- Cycle Duration: 6–8 weeks
- Note: Temporary vision side effects (yellow tint or light sensitivity) may occur at higher doses but are reversible
8-Week S4X Recomp Cycle Example
| Week | S4X (mg/day) | Optional Stack | Notes |
| 1–2 | 25 | Cardarine 10–20 mg | Start with low dose to assess tolerance |
| 3–6 | 50 | Ostarine 10–20 mg | Peak recomp/fat loss effects |
| 7–8 | 50 | SR9009 20 mg/day (optional) | Begin PCT planning |
Post Cycle Therapy (Recommended)
- Start: Immediately after last dose
- Clomid: 50/50/25/25 mg (Weeks 9–12)
- Or: Nolvadex 40/40/20/20 mg
Common Questions About S4X
Can women use Andarine?
Yes, but at lower doses (12.5–25 mg/day). It’s often favored for its cosmetic effects — hardening, lean muscle retention, and fat
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UPDATED November 18th, 2025
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