No. It is a dinucleotide coenzyme built from nucleotides rather than amino acids, present in every cell. It is catalogued alongside peptides because the research audience overlaps.

There is no published work establishing an interaction between them. They are studied in different systems, and a shared position in ageing-related marketing is not evidence of a shared pathway.

Which is better studied?

NAD+ biology is enormously well characterised as basic biochemistry. That is not the same as evidence for supplementing it, and the two questions get conflated constantly.

NAD+ vs Sermorelin — a coenzyme and a releasing-hormone analogue

4 min readUpdated 2026-08-27

NAD+ is nicotinamide adenine dinucleotide, a coenzyme built from nucleotides and central to cellular redox reactions — not a peptide. Sermorelin is an analogue of growth-hormone-releasing hormone acting at the GHRH receptor. They appear together in ageing-related searches and share no mechanism, no class and no literature.

The only thing joining these two is the word "ageing" in the copy that surrounds them. It is worth stating plainly, because the pairing recurs.

What each is

Comparison
	NAD+	Sermorelin
Class	Dinucleotide coenzyme	GHRH analogue peptide
Built from	Nucleotides	Amino acids
Acts on	Cellular redox reactions	The GHRH receptor
Naturally present	In every cell, abundantly	As the native hormone it mimics

A well-understood molecule is not a well-supported product

NAD+'s role in metabolism is textbook biochemistry. The question of what happens when it is supplied exogenously is a different question with a much thinner literature, and the strength of the first is routinely offered as evidence for the second.

The compounds discussed here

NAD+Sermorelin

Not sure where to startAnswer four questions and see what the research points to →

Go deeper

NAD+ is not a peptide — what that changes

Frequently asked questions

Is NAD+ a peptide?: No. It is a dinucleotide coenzyme built from nucleotides rather than amino acids, present in every cell. It is catalogued alongside peptides because the research audience overlaps.
Do they interact?: There is no published work establishing an interaction between them. They are studied in different systems, and a shared position in ageing-related marketing is not evidence of a shared pathway.
Which is better studied?: NAD+ biology is enormously well characterised as basic biochemistry. That is not the same as evidence for supplementing it, and the two questions get conflated constantly.

References

Primary literature for the compounds above. Links open the record on PubMed.

Sermorelin: a review of its use in the diagnosis and treatment of children with idiopathic growth hormone deficiency Prakash A, et al. BioDrugs. 1999. PMID 18031173 → · summary
Continuous subcutaneous GHRH(1-29)NH2 promotes growth over 1 year in short, slowly growing children Thorner M, et al. J Clin Endocrinol Metab. 1990. PMID 2140733 → · summary