S4 is often discussed in cutting contexts due to its ability to preserve strength.
Mechanism
- Partial androgen receptor agonist
- Less anabolic than others, but still active
What Users Report
- Strength retention during caloric deficits
- “Harder” appearance
- Increased vascularity in some
The Notorious Issue
Vision disturbances:
- Yellow tint
- Night-vision difficulty
- Brightness adjustment issues
This is not subtle for those affected.
Bottom Line
S4 can be effective — but its side-effect profile is non-negotiable.
If you used S4, did vision sides show up — or never at all?