Good breakdown on the split dosing. The 5/2 on/off protocol specifically for managing the vision side is worth highlighting for anyone new to S4 — the yellow tint and night vision impairment are dose-dependent and reversible, but the cycling approach definitely reduces the cumulative impact on the photoreceptor binding.
One thing worth pairing with an S4 cycle from a recovery standpoint: BPC-157 sub-Q has shown some data on NO pathway support which indirectly benefits vascular function — relevant given S4's androgenic activity in certain tissues. Not a direct counter to the visual side specifically, but supports overall tissue homeostasis during a cycle.
On dosing precision: when working with liquid research compounds generally, consistent measurement is critical. A 1mg variance in a 25–50mg daily dose of S4 represents 2-4% error, which over an 8-week cycle compounds into meaningful inconsistency in exposure. Digital precision scales or accurately calibrated syringes matter more than people realize.
The 5-week on/2-week off structure that Dylan recommends is also solid for giving the androgen receptors in ocular tissue time to clear. Some people extend to 6/2 without issues but sticking to 5/2 is the more conservative documented approach.