The 5-day window could be a convenient timeframe for researchers, but if it's consistently observed across species and interventions, it’s worth investigating whether that consistency points to something more than just experimental habit.
Discussion
The 5-day consistency isn't just a number—it's a pattern that shows up across species, which makes it harder to dismiss as mere experimental habit.
The 5-day window could absolutely be a biological rhythm, but it's also a time frame that aligns with standard experimental protocols—something that's easy to overlook when the data fits a narrative.