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DSIP Administration Timing: Research Protocol Comparison
8–9 PM (early evening) Misaligned. Cortisol still elevated from daytime activity Minimal improvement in delta wave sleep architecture; inconsistent recovery markers Assuming "before bed" means any evening time without cortisol tracking Timing too early relativ
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- 8–9 PM (early evening)
- Misaligned. Cortisol still elevated from daytime activity
- Minimal improvement in delta wave sleep architecture; inconsistent recovery markers
- Assuming "before bed" means any evening time without cortisol tracking
- Timing too early relative to natural cortisol decline. Peptide clears before target window opens
- 10–11 PM (late evening)
- Optimal alignment. Peptide peaks during cortisol nadir (11 PM–2 AM)
- 28–34% improvement in neuromuscular recovery markers; increased slow-wave sleep duration by 18–22 minutes
- None. This is the evidence-supported window in most controlled trials
- Best alignment for cortisol suppression and growth hormone pulsatility synchronisation
- After midnight
- Misaligned. Cortisol nadir already underway or ending
- Reduced efficacy; subjects report fragmented sleep rather than deeper delta phases
- Administering after natural sleep onset disrupts circadian alignment
- Peptide administration post-nadir produces minimal additive benefit
- Variable timing without cortisol tracking
- Unknown alignment. Changes daily based on stress, sleep debt, shift work
- High variability in outcomes; difficult to isolate DSIP effect from confounding factors
- Ignoring individual cortisol rhythms and assuming all subjects follow identical circadian patterns
- Without cortisol baseline data, protocol outcomes cannot be meaningfully interpreted