NAD+ Precursors & Related Peptides
NAD+ Precursor / Longevity MoleculesupplementAlso known as: NMN, NR, Nicotinamide Mononucleotide, Nicotinamide Riboside, NAD+ Boosters, NADH
A class of molecules that boost cellular NAD+ levels to support energy metabolism, DNA repair, sirtuin activation, and anti-aging pathways — while not peptides themselves, they are commonly discussed alongside anti-aging peptides.
Overview
NAD+ (Nicotinamide Adenine Dinucleotide) precursors — primarily NMN (Nicotinamide Mononucleotide) and NR (Nicotinamide Riboside) — are not technically peptides but are ubiquitously discussed in the peptide and longevity communities as essential components of anti-aging protocols. NAD+ levels decline with age by approximately 50% between ages 40 and 60, contributing to mitochondrial dysfunction, impaired DNA repair, and reduced sirtuin activity. Supplementation with precursors aims to restore youthful NAD+ levels. NMN is the more direct precursor (one enzymatic step from NAD+), while NR requires two steps. Both have shown benefits in animal studies for energy metabolism, cognitive function, cardiovascular health, and overall lifespan. Human clinical trials are ongoing, with early results showing increased NAD+ blood levels and improvements in biomarkers of aging. These are often stacked with peptides like Epitalon, MOTS-c, and SS-31 in comprehensive longevity protocols.
Mechanism of Action
NAD+ precursors restore cellular NAD+ through biosynthetic pathways: (1) NMN is converted directly to NAD+ by NMNAT enzymes; (2) NR is phosphorylated to NMN by NRK enzymes, then converted to NAD+; (3) Restored NAD+ activates sirtuins (SIRT1-7), the 'longevity enzymes' that regulate gene expression, DNA repair, and metabolism; (4) Supports PARP-mediated DNA damage repair; (5) Enhances mitochondrial function by supporting electron transport chain complex I; (6) Activates CD38/NADase regulation for immune function; (7) Supports circadian rhythm regulation through SIRT1/CLOCK interactions.
Molecular Formula
NMN: C11H15N2O8P; NR: C11H15N2O5+
Molecular Weight
NMN: 334.22 g/mol; NR: 255.25 g/mol
Sequence
Not applicable — nucleotide derivatives, not amino acid sequences
Dosage Protocols
Dose Range
250mg NMN or 300mg NR – 1000mg NMN or 600mg NR
Frequency
Once daily (morning)
Route
oral
Cycle Length
Ongoing (daily supplementation)
Take in the morning to align with circadian NAD+ peaks. Sublingual NMN may improve bioavailability. Can be combined with TMG (trimethylglycine) to support methylation.
Source: Clinical trials and longevity research protocols
🧮 Personalized Dosage Calculator
💰 Estimated Pricing
Typical Supply
250-500mg capsules (NMN/NR)
Last Updated
2026-02
NMN and NR supplements. OTC: $30-80. IV NAD+ infusions: $250-1000/session. Sublingual NAD+: $50-100. Wide price range by form.
⚠️ Prices are estimates based on publicly available data and may vary significantly by vendor, location, and prescription status. This is not medical or financial advice.
Side Effects
| Effect | Severity |
|---|---|
| Mild GI discomfort | mild |
| Flushing | mild |
| Insomnia | mild |
| Headache | mild |
Pros & Cons
Addresses a fundamental driver of aging — declining NAD+ levels
Oral administration — no injections required
Extensive and growing body of human clinical trial data
Synergizes well with other anti-aging peptides (Epitalon, MOTS-c, SS-31)
Generally well-tolerated with excellent safety profile in trials up to 1250mg/day
Not technically peptides — nucleotide precursors with different pharmacology
Expensive for long-term daily supplementation
NMN regulatory status uncertain in the US following FDA challenge
Long-term human safety data still limited (most trials are short-term)
Theoretical concern about fueling NAD+-dependent enzymes in cancer cells
Research Studies
🩸 Blood Work
No specific bloodwork requirements reported for this peptide. General health panels are always recommended before starting any peptide protocol.
Legal Status
NR is available as a dietary supplement (Tru Niagen, etc.). NMN regulatory status varies — available as supplement in many countries, FDA challenged its supplement status in the US in 2022. Both available for purchase without prescription in most jurisdictions.
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