Peptides
Evidence: animal_plus_anecdotal
DSIP is a naturally occurring nonapeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) originally isolated from rabbit brain hypothalamus in 1977. It modulates GABAergic neurotransmission by potentiating GABA-activated currents in hippocampal and cerebellar neurons while blocking NMDA-activated potentiation in cortical neurons. It also interacts with opioid-associated receptors, modulates serotonin and dopamine systems (increasing serotonin levels), and promotes delta wave (slow-wave) sleep through mechanisms that remain incompletely characterized.
Standard: Research indicates 100-300 mcg administered before bedtime via subcutaneous injection or intranasal.
Maintenance: Research indicates 100 mcg nightly or every other night.
Administration: subcutaneousintramuscularintranasal
Timing: 30-60 minutes before desired sleep onset. Evening only.
Duration: 2-4 week cycles with equal rest periods to prevent tolerance.
DSIP remains a 'riddle' in neuroscience — discovered in 1977 but its exact mechanisms are still debated. A double-blind study in chronic insomniacs showed improved sleep onset and quality. The peptide is unstable and degrades rapidly, requiring careful reconstitution and storage. Community reports are mixed — some report profound sleep improvement, others notice little effect. Best suited for clients with sleep onset insomnia rather than sleep maintenance issues. Not a first-line recommendation due to limited human data.
Research-grade supplier. Limited compounding pharmacy availability. Unstable peptide — requires careful handling and storage at -20C.
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