DSIP vs NAD+
Comprehensive side-by-side comparison of mechanisms, dosing, side effects, and research
Also: Delta Sleep Inducing Peptide, Delta Sleep-Inducing Peptide
DSIP, or delta sleep-inducing peptide, is a small naturally occurring nonapeptide (sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) first isolated in the 1970s from the blood of sleeping rabbits. As the name suggests, it was named for its ability to promote delta-wave (deep, slow-wave) sleep in animals. Despite five decades of study it has no regulatory approval and the human evidence for it as a sleep aid is weak and inconsistent.
Also: Nicotinamide Adenine Dinucleotide, NAD
NAD+ is not a peptide at all, it is a coenzyme every cell uses to move electrons around during energy production. It gets grouped with peptides because it is sold in the same places and injected the same way. Levels fall with age, which is the entire basis of the longevity interest, but the leap from that observation to injecting it is longer than most sellers admit.
Key Comparison Insights
- Both peptides belong to the Anti-Aging category, suggesting similar primary applications.
Detailed Comparison
| Attribute | DSIP | NAD+ |
|---|---|---|
| Category | Anti-Aging | Anti-Aging |
| FDA Status | Not FDA Approved | Not FDA Approved |
| Clinical Status | Pre I II III IV FDA | Pre I II III IV FDA |
| Mechanism of Action | How DSIP actually works is still not nailed down, which is unusual for a peptide this old. It does not have one clear receptor of its own. Instead it seems to act as a modulator, influencing slow-wave sleep, neurotransmitter levels, circadian rhythm, hormone release (including growth hormone), and stress responses. One striking animal finding: injecting antibodies against DSIP into the brain blocked the normal rise in slow-wave sleep and growth hormone, hinting that the body's own DSIP plays a real regulatory role. Some reports also suggest it can act on opioid-related pathways, which is why it has been studied in addiction withdrawal. Treat these mechanisms as plausible but not fully proven. | NAD+ is a required cofactor in the reactions that turn food into ATP, and it is consumed as a substrate by two families of enzymes tied to ageing: sirtuins, which regulate DNA repair and metabolic signalling, and PARPs, which repair DNA damage. Because NAD+ is used up by these processes, sustained DNA damage or metabolic stress can deplete it. The theory is that restoring NAD+ restores the function of everything downstream. The unresolved problem is delivery: NAD+ is a large charged molecule that does not readily cross cell membranes, which is why most serious research uses precursors like nicotinamide riboside or NMN that cells can actually take up and convert internally. |
| Common Dosing | 100-250 mcg before bed Once daily, 30 min before sleep | 50-100 mg subcutaneous, 2-3x weekly Two to three times weekly, or per clinic protocol for IV |
| Administration | Subcutaneous, intramuscular, or intranasal | Subcutaneous injection or slow IV infusion. Fast infusion is the main cause of the flushing and chest tightness people report. |
| Typical Duration | 2-4 weeks typical | Ongoing use is common. No controlled long-term injectable data exists. |
| Best Time to Take | 30-60 minutes before bed | Morning |
Possible Side Effects May vary by individual |
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| Research Summary | The early animal work was genuinely interesting: DSIP reliably increased delta sleep in rabbits, rats, and mice, and seemed tied to growth hormone release during sleep. The human data is far less convincing. A few small studies reported longer or better sleep after intravenous DSIP in chronic insomniacs, with no daytime grogginess. But a double-blind, placebo-controlled study published in Neuropsychobiology (1992) concluded that short-term DSIP treatment of chronic insomnia is unlikely to be of major therapeutic benefit, since objective gains were weak and patients did not feel their sleep was better. Separate older reports claimed high success rates relieving opiate and alcohol withdrawal symptoms, but these were small, uncontrolled, and never replicated to modern standards. Bottom line: real history, real animal data, but no solid randomized evidence that it works as a sleep drug in people. | The decline of NAD+ with age is well documented, and precursor supplementation reliably raises blood NAD+ levels in human trials. What those trials have not clearly shown is that raising NAD+ produces the functional benefits people are hoping for. Human studies on nicotinamide riboside and NMN show good safety and consistent biomarker changes, with inconsistent effects on measurable outcomes like muscle function, insulin sensitivity or fatigue. Direct injected or infused NAD+ has far thinner evidence than the precursors do: most of what exists is small, uncontrolled, or observational, and the widely reported subjective effects of IV NAD+ have not been separated from placebo in good trials. Anyone telling you injected NAD+ has strong human evidence is describing the precursor literature and attaching it to a different product. |
Frequently Asked Questions: DSIP vs NAD+
What is the difference between DSIP and NAD+?
DSIP is a anti-aging peptide that dsip, or delta sleep-inducing peptide, is a small naturally occurring nonapeptide (sequence trp-ala-gly-gly-asp-ala-ser-gly-glu) first isolated in the 1970s from the blood of sleeping rabbits. as the name suggests, it was named for its ability to promote delta-wave (deep, slow-wave) sleep in animals. despite five decades of study it has no regulatory approval and the human evidence for it as a sleep aid is weak and inconsistent. NAD+ is a anti-aging peptide that nad+ is not a peptide at all, it is a coenzyme every cell uses to move electrons around during energy production. it gets grouped with peptides because it is sold in the same places and injected the same way. levels fall with age, which is the entire basis of the longevity interest, but the leap from that observation to injecting it is longer than most sellers admit. The main differences lie in their mechanisms of action and clinical applications.
Which is better, DSIP or NAD+?
Neither is universally "better" - the choice depends on your specific goals. DSIP is typically used for anti-aging purposes, while NAD+ is used for anti-aging. Always consult with a healthcare provider to determine which may be appropriate for your situation.
Can DSIP and NAD+ be used together?
Some peptide protocols combine multiple compounds for synergistic effects. However, using DSIP and NAD+ together should only be considered under medical supervision, as both compounds have their own side effect profiles and potential interactions. Research on their combined use may be limited.