Why sleep peptides get stacked
Sleep is a real problem for a lot of the people who buy research peptides in the Philippines: BPO staff on night shifts, returning OFWs with jet lag, anyone in a hot apartment through a brownout. The market answer is a stack, usually DSIP for deep sleep, epitalon for the melatonin rhythm, Selank for the anxiety that keeps people awake, and a nightly GH peptide such as sermorelin or ipamorelin on the theory that GH pulses and slow-wave sleep go together.
Each of those claims has a piece of science behind it. None of them has a trial behind the product as sold, and no study has combined any two of them. This page separates the physiology, which is often sound, from the evidence for the vials, which is thin and in places forty years old.
The evidence, compound by compound
| Compound | Sleep claim | Best human sleep data | Verdict from that data |
|---|---|---|---|
| DSIP Stocked locally | Promotes delta (deep) sleep | Two double-blind insomnia trials, 14 and 16 patients, 1987 and 1992, IV | Conflicting; later reviewers call the sleep link unproven |
| Epitalon | Restores night-time melatonin | Elderly people with low pineal function, one Russian group, no numbers in the abstract | Unverified |
| Selank Stocked locally | Reduces anxiety without sedation | Two anxiety-disorder trials vs benzodiazepines, about 60 patients each | Anxiety effect reported; sleep not the measured outcome |
| Sermorelin and GHRH | GHRH promotes slow-wave sleep | IV GHRH in young men (1993); 16-week nightly analogue in older adults (1997) | Acute effect real; chronic trial found sleep quality unaffected |
| Ipamorelin Stocked locally | Ghrelin receptor and deep sleep | None; no ipamorelin study measured sleep | Untested |
DSIP: named for deep sleep, mechanism unknown
DSIP was isolated in 1977 from the blood of rabbits in an induced sleep state and named for its apparent effect on delta waves. Nearly fifty years on, no gene, precursor protein or receptor has been found for it. Kovalzon and Strekalova, who worked on DSIP and its analogues themselves, wrote in 2006 that the hypothesis of DSIP as a sleep factor is "extremely poorly documented and still weak", and that in their own animal work certain synthetic analogues promoted slow-wave sleep but DSIP itself did not.
The human trials are small and old. Schneider-Helmert (1987) gave 14 people with severe chronic insomnia DSIP or placebo for seven nights under double-blind conditions and reported substantially better night sleep, with efficiency reaching normal levels, and better daytime alertness. Bes and colleagues (1992) gave 16 patients IV DSIP or a glucose placebo on three afternoons and found slightly higher sleep efficiency and shorter sleep latency, but judged the effects weak, possibly due to a chance shift in the placebo group, and concluded short-term DSIP was "not likely to be of major therapeutic benefit". Both used intravenous infusion in a sleep laboratory, not subcutaneous injection at home, and no trial since has tested DSIP for sleep.
Epitalon: the melatonin rhythm claim
Epitalon's sleep angle is indirect. The pineal gland makes melatonin and sets the day-night rhythm, and Khavinson's group reports that pineal peptide preparations, including synthetic epitalon, restored night-time melatonin release and a more normal circadian rhythm in old monkeys and in elderly people with low pineal function. The 2007 abstract gives no participant numbers, doses or statistics, and no group outside the developers has replicated it. Epitalon has never been tested in a sleep laboratory, and there is no study of it in shift workers or jet lag.
Selank: anxiety, not sleep
Selank belongs in the stack because anxiety is a common cause of poor sleep. Its trials, in 62 and 60 patients with diagnosed anxiety disorders, compared it with the benzodiazepines medazepam and phenazepam and reported similar anti-anxiety effects with an anti-fatigue rather than sedative profile. Sleep was not the measured outcome in either, so Selank's place in a sleep stack rests on a chain of inference: less anxiety, therefore better sleep. That may be true for a given person; it is not something the trials measured. The cognitive stack page covers Selank's evidence in more detail.
GH peptides at night: the physiology is real, the trials are not
The strongest piece of science on this page belongs to GHRH. Natural GH release clusters in the first slow-wave sleep of the night, and the two systems are linked. Kerkhofs and colleagues (1993) gave young men intravenous GHRH at different points in the night: in early sleep it increased REM sleep, and given during the third REM period it cut wakefulness and produced an almost tenfold increase in slow-wave sleep. GHRH, in other words, is sleep-promoting in humans, especially when sleep pressure is low.
The catch is what happened when a GHRH analogue was given nightly for months. Khorram and colleagues (1997) gave 19 adults aged 55 to 71 a GHRH (1-29) analogue every night for 16 weeks and measured quality of life, including sleep, by questionnaire. GH and IGF-1 rose. Sleep quality was unaffected in both sexes. An acute IV effect in a sleep laboratory did not turn into a felt improvement over four months of nightly injections, at least by the measure used.
Ipamorelin and the ghrelin-receptor peptides have a different problem: no data. No ipamorelin trial measured sleep. The closest evidence is for ghrelin itself, which in earlier work increased slow-wave sleep in young men, but in a 2007 study of 10 young women raised GH and cortisol without changing sleep at all. Two sexes, two results, and neither tested the peptide people actually inject.
The one modern sleep-laboratory result for a GH secretagogue belongs to MK-677, which is not a peptide: 25 mg at bedtime increased stage IV sleep by about 50% and REM sleep by more than 20% in eight young men, and REM by nearly 50% in six older adults, over 7 to 14 days. It is cited here because it is the study people have in mind when they say "GH peptides improve deep sleep". It was a small crossover in 14 people, and it tested a different molecule with its own glucose and heart failure signals.
What has and has not been studied together
- No trial has combined DSIP with epitalon, Selank or a GH peptide.
- No trial has combined a GHRH analogue with a ghrelin mimetic and measured sleep, even though CJC-1295 + ipamorelin is sold for nightly use.
- No trial of any compound here enrolled shift workers or people with jet lag.
- No trial has run longer than 16 weeks, and the DSIP trials ran days.
The stack therefore combines one compound whose mechanism is unknown, one whose sleep data has no published numbers, one whose trials did not measure sleep, and one whose acute effect did not survive a four-month trial. That does not mean nothing in it works. It means the sleep it is sold for has not been measured for the products as sold. For how each compound ranks on its own, see best peptides for sleep.
Safety information that does exist
The DSIP trials reported no serious adverse events over a few nights in a few dozen people. Epitalon's and Selank's Russian reports describe no side effects but give little detail. The GH peptides raise IGF-1, with the theoretical concerns that attach to any GH-raising compound, and the 16-week GHRH analogue trial recorded a transient rise in blood lipids as its one adverse effect. Ghrelin-receptor peptides raised cortisol as well as GH in the human ghrelin studies, which is not obviously what a sleep stack wants. Per-compound detail is collected in the side effects hub.
Persistent insomnia has common, treatable causes in the Philippines, including sleep apnoea, depression and thyroid disease, and none of the compounds here is a substitute for having those looked at by a licensed physician.
Status in the Philippines
None of DSIP, epitalon, Selank, sermorelin or ipamorelin is registered with FDA Philippines, and none is approved for sleep anywhere. All circulate here as research compounds and none is a controlled substance under RA 9165.
Storage
All are lyophilised peptides: refrigerate before mixing, 2 to 8°C afterward, in the body of the fridge rather than the door. A brownout can push a household fridge out of range within hours, so keep a cooler and ice packs ready. The reconstitution calculator and the DSIP calculator handle the mixing arithmetic.
