The DSIP or the Delta sleep-inducing Peptide is a somnogeneric nonapeptide that impacts the neuromodulation. It is typically found in the brain and passes by the blood barriers quite quickly. Studies have shown that DSIP and as well as its analogs are classified as peptide neuromodulators. 

Studies have also shown that DSIP has exhibited a stress-protective action that helps decrease stress metabolic disorders for humans and animals.

It is believed that the Delta Sleep-Inducing Peptide works in such a way that it modulates the activity of GABAergic gluta and other neuronal systems too.

3. Top 2 Health Benefits Of DSIP
DSIP Is A Powerful Sleep Agent
Many other testimonials (here and here) make an important distinction: DSIP does not necessarily make you fall asleep faster, but rather it makes your sleep much deeper and makes it easier to enter deep sleep. 
DSIP May Ease Alcohol and Opiate Withdrawal
Addiction can be a terrible thing to go through, especially if one has to suffer through the withdrawal process needed to get clean. Fortunately, DSIP has already been used in experiments involving human subjects as early as the 1980s for this very purpose.


DSIP Has Other Potential Health Benefits
As I said earlier, DSIP may be one of the multi-functional peptides with respect to its positive health benefits.
We don't have enough data to definitively make claims, but here are some of the areas where the most promise lies:
May indirectly increase test*osterone levels through greater secretion of lutei*nizing hormone (LH)
Increases growth h*ormone (GH) secretion, possibly adding another mechanism through which DSIP improves sleep quality
Inhibits the release of somatostatin, which is known as a growth h*ormone-inhibiting hormone
Rat studies (here and here) suggest DSIP has anti-epileptic properties (i.e. reducing/preventing the occurrence of seizures)
One clinical pilot study in humans found DSIP reduced chronic pain associated with migraines and tinnitus
Possibly restores mitochondrial respiratory activity
In vitro studies (here and here) suggest DSIP could have antioxidant properties for decreasing cellular damage

4. Product Side Effect
Here are the most commonly reported side effects of DSIP I've come across:

• Possible build-up of tolerance over a short time period (i.e. you need more DSIP to get the same result)
• Dose-sensitivity: Too little produces no effect while too much may lead to excessive sleepiness
• Potential increase of body temperature (may alleviate hypothermia, but not enough info to say for sure)
• Some human studies suggest DSIP does not induce any significant improvements in sleep
• Injection-related side effects such as pain and redness at site of injection
• Headaches