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NAD+

Last reviewed: April 18, 2026 by The Peptide Catalog Team

A cellular energy molecule for DNA repair, metabolism, and anti-aging. NAD+ (Nicotinamide Adenine Dinucleotide) is a coenzyme essential for cellular energy production, DNA repair, and sirtuin activation. Levels decline significantly with age. Injectable NAD+ provides direct cellular replenishment, bypassing oral bioavailability issues. Research explores applications in anti-aging, neurodegeneration, metabolic health, and addiction recovery.

CategoryLongevity & Mitochondrial Peptides
Classlongevity
GoalLongevity
Overview

Core Benefits

Key Advantages
Cellular energy support
Essential coenzyme for ATP production in every cell.
NAD+ pool restoration
Replenishes NAD+ levels that drop 50%+ by middle age.
Sirtuin activation
Fuels SIRT1–7 enzymes for DNA repair and metabolism.
DNA repair fuel
Powers PARP enzymes that repair DNA damage.
Cognitive support
Brain energy and cognitive function support in research.
IV or injection delivery
Bypasses oral bioavailability issues for direct uptake.

These are educational summaries of commonly discussed effects in wellness/regenerative contexts, not guarantees.

NAD+ Results Timeline

Progression
1
Week 1–2
Physical Changes
Subtle improvements in energy levels
Performance & Recovery
Cellular NAD+ levels rising
Other Benefits
May notice improved mental clarity
2
Week 3–4
Physical Changes
Gradual vitality improvements
Performance & Recovery
Enhanced mitochondrial function
Other Benefits
Sirtuin activation supporting DNA repair
3
Month 2–3
Physical Changes
Improved skin quality, reduced oxidative stress signs
Performance & Recovery
Sustained energy, better exercise recovery
Other Benefits
Cumulative cellular health benefits
4
Long-term
Physical Changes
Longevity/healthspan focus
Performance & Recovery
Maintained cellular energy production
Other Benefits
Often used continuously or cycled; pairs with precursors (NMN, NR)

Timeline is illustrative and non-guaranteed. Outcomes vary and are commonly discussed alongside training, nutrition, sleep, and cycling practices.

Read the full NAD+ results timeline →

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Evidence at a glance

Two parallel grades per outcome — clinical RCT depth and real-world community adoption. See the Research Overview below for citations and detail.

OutcomeClinical EvidenceCommunity Evidence
Raising NAD+ levels (NR / NMN)StrongModerate
Cognitive / neurological outcomes (MCI, Parkinson's)ModerateModerate
Cardiovascular / vascular functionPreliminaryModerate
Mitochondrial function in skeletal muscleWeakModerate

Research overview

Outcome-by-outcome look at what the evidence actually supports for NAD+, including human vs. animal study counts and our editorial take on each.

Raising NAD+ levels in humans

Clinical:StrongCommunity:Moderate

Multiple human RCTs (Martens 2018, Dellinger 2017, Brakedal 2022) confirm that oral NR or NRPT consistently raises blood NAD+ levels by 40-100% in healthy and clinical populations. The biochemistry is well-established. The harder question — does raising NAD+ produce clinically meaningful aging or disease outcomes — is much less settled.

6 human studies · 12 animal studies

Key findings & citations
  • Martens 2018: chronic NR safely elevates NAD+ in healthy older adults.
  • Dellinger 2017 (NRPT): ~40-90% NAD+ elevation in 60-80 year olds.
  • Brakedal 2022 (NADPARK Phase 1): NR raised NAD+ in newly-diagnosed PD patients.
  • Mecomb 2024: Acute NR raises cerebral NAD+ in vivo in healthy volunteers.

Our take

NAD+ goes up. That's the part that's settled. Whether that translates to slower aging or fewer diseases is mostly still hopeful biomarker work.

Clinical outcomes in aging / disease

Clinical:ModerateCommunity:Moderate

MCI trials (Vreugdenhil 2024) show NR raises NAD+ but clinical cognitive endpoints are inconsistent. NADPARK in Parkinson's was a Phase 1 safety/biomarker trial, not an outcomes trial. Skeletal muscle / mitochondrial respiration trials in obese men (Dollerup 2019) were null. The pattern: surrogates move, hard endpoints often don't.

4 human studies · 8 animal studies

Key findings & citations
  • MCI: NAD+ rises in MCI patients on NR but cognitive endpoints inconsistent.
  • Skeletal muscle (Dollerup 2019): no improvement in mitochondrial respiration.
  • PAD vascular function (2024): some signals, single small trial.
  • Long-COVID NR trial (2025): mixed cognitive endpoints.

Our take

Solid biochemical molecule with weak hard-outcome evidence. Reasonable for users who specifically want to raise NAD+; don't expect meaningful clinical disease modification.

What NAD+ doesn't do

Claims that current evidence does not support. Worth knowing before you set expectations.

Top NAD+ Vendors

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Reconstitution Calculator

Dilution math and unit conversions. Prefilled using a common vial size for this peptide.

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Storage & Handling

Storage at a glance

Proper storage temperatures, shelf life, reconstitution best practices, and travel tips for lyophilized and reconstituted peptides.

Powder: Freezer
1+ year at -20°C
Reconstituted: Fridge
4 weeks max at 2-8°C
View Complete Storage Guide

Handling specifics

Educational overview on storage, labeling, and traceability considerations for lab environments. Consult primary literature and vendor documentation for specifics.

Powder storage (very stable)
  • Freezer (-20°C): 1+ year
  • Refrigerator (2-8°C): 1-3 months
  • Room temperature: 2-3 weeks (emergency only)
Reconstituted storage (fragile)
  • MUST refrigerate at 2-8°C
  • 4-week maximum shelf life
  • NEVER freeze after reconstitution
  • Use bacteriostatic water for multi-dose
Molecular Structure
  • Type: Coenzyme (dinucleotide)
    (Not a peptide — a small molecule cofactor.)
  • Molecular Weight: 663.4 Da
    (C₂₁H₂₇N₇O₁₄P₂)
  • Function: Electron carrier
    (NAD⁺ ↔ NADH redox cycling in metabolism.)
  • Half-life (IV): ~30-45 minutes
    (Rapidly taken up by cells after infusion.)
Molecular Structure
Nicotinamide — Ribose — Phosphate — Phosphate — Ribose — Adenine
NAD+ consists of two nucleotides joined by phosphate groups: nicotinamide mononucleotide (NMN) and adenosine monophosphate (AMP). Injectable NAD+ bypasses the need for precursor conversion.
Key takeaway: NAD+ is the rate-limiting substrate for sirtuins (SIRT1-7) and PARP enzymes critical for DNA repair. Declining NAD+ with age is linked to mitochondrial dysfunction, neurodegeneration, and metabolic disease.

FAQ

What is NAD+ and why is it important?

NAD+ (Nicotinamide Adenine Dinucleotide) is a coenzyme found in every cell of the body. It's essential for energy production (ATP synthesis), DNA repair, sirtuin activation, and hundreds of metabolic reactions. NAD+ levels naturally decline 50%+ by middle age, which is linked to aging and age-related diseases. Replenishing NAD+ is a major focus of longevity research.

How is injectable NAD+ different from oral supplements like NMN or NR?

Injectable NAD+ delivers the coenzyme directly to bloodstream and cells, bypassing digestive breakdown and liver metabolism. Oral precursors (NMN, NR, niacin) must be converted to NAD+ through multiple enzymatic steps, with variable efficiency. IV/subcutaneous NAD+ provides rapid, complete cellular uptake — though it's more expensive and requires injection.

What are the benefits of NAD+ therapy?

Research and clinical reports suggest benefits including: increased energy and reduced fatigue, improved mental clarity and focus, enhanced athletic performance and recovery, support for healthy aging, potential neuroprotection, and improved metabolic function. NAD+ activates sirtuins (SIRT1-7) which regulate DNA repair, inflammation, and longevity pathways.

Why do NAD+ levels decline with age?

Several factors cause age-related NAD+ decline: increased consumption by PARP enzymes (DNA repair), CD38 enzyme activity (which breaks down NAD+), reduced production of NAD+ precursors, and chronic inflammation. By age 50, NAD+ levels may be half of what they were at age 20. This decline correlates with mitochondrial dysfunction, cellular senescence, and age-related diseases.

What are the side effects of NAD+ injections?

IV NAD+ can cause flushing, chest tightness, nausea, and cramping during infusion — these typically resolve by slowing the drip rate. Subcutaneous injections may cause injection site reactions. Some people report temporary anxiety or restlessness. Starting with lower doses and titrating up can minimize side effects. NAD+ is generally well-tolerated when administered properly.

How long does reconstituted peptide last?

Once mixed with bacteriostatic water, peptides remain stable for up to 4 weeks when refrigerated at 2-8°C (36-46°F). Unopened powder can last 1+ year in the freezer. Get our complete Storage & Travel Guide.

Is this peptide legal to purchase?

Peptides sold "for research purposes only" are legal to purchase in the US, but are not FDA-approved for human use outside of specific medical applications. Always consult a healthcare provider before use.

New to peptides?

Take our Peptide Match tool to find the best peptide for your goals. You can also read our Complete Guide to Peptides to learn the basics.

Scientific Sources

The following peer-reviewed studies and official resources provide additional scientific context for this peptide:

NAD+ Research Articles

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NAD+ Side Effects: Flushing, Nausea, Infusion

Flushing leads. Nausea and chest pressure cluster during fast infusions. Full safety breakdown from trial and community data.

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NAD+ Results: Week-by-Week Timeline

Energy shifts within days, metabolic markers take 4-8 weeks. Full timeline for IV, SubQ, and oral routes compared.

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Disclosure: we may earn affiliate commission from qualifying purchases. Educational information only — not medical advice.