NAD+ is the cellular-energy coenzyme that sits at the center of the longevity market in 2026. Every mitochondrial-function biohack, every sirtuin-pathway study, every podcast about David Sinclair eventually points back to boosting NAD+. That's driven a research-peptide market full of wildly varying prices: the same 500mg vial sells anywhere from $35 to $120 depending on vendor.
This guide covers what you should actually pay per milligram, which vial size matches a realistic subcutaneous protocol, how to verify a COA that confirms you're getting NAD+ (disodium salt) rather than NADH or nicotinamide, and the red flags that signal a vendor to avoid. NAD+ is one of the cheapest peptides to manufacture if you know what you're doing — which makes unusually high prices as much of a red flag as unusually low ones.
This is not a ranked vendor list — for that, see our Best NAD+ Vendors comparison. This guide teaches you how to evaluate any vendor yourself.
Why NAD+ Is Worth Buying Carefully
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme present in every cell you own. It's the substrate for sirtuin enzymes (SIRT1-7), PARP DNA repair proteins, and CD38. NAD+ levels decline roughly 50% between age 20 and age 60, and that decline is linked to the mitochondrial dysfunction, inflammatory drift, and metabolic slowdown that characterize aging.
Three delivery methods dominate the research-peptide market:
- Subcutaneous injection — 50-100 mg/day, most common among self-experimenters
- Intramuscular injection — higher doses (100-250 mg), better for people with thin subcutaneous tissue
- Intravenous infusion — 500-1000mg over 2-4 hours, typically done in clinics at $300-1000/session
Unlike BPC-157 or TB-500, NAD+ isn't a synthesized peptide — it's a dinucleotide that's also a bulk pharmaceutical ingredient. It's made at scale by chemistry companies for research and pharmaceutical supply chains. This is good news for pricing but creates a verification problem: how do you know what's in the vial is pharmaceutical-grade NAD+ versus a cheaper precursor?
That question is the entire buying calculus.
Understanding NAD+ Pricing
NAD+ is sold as a white or off-white lyophilized powder in sealed vials. Three factors move price: vial size (bigger = much cheaper per mg), purity grade (research vs pharmaceutical), and whether the vendor invests in independent COAs.
Current Market Pricing (2026)
| Vial Size | Typical Price Range | Price Per mg | Best For |
|---|---|---|---|
| 100 mg | $20-40 | $0.20-0.40/mg | Trial vial, sublingual |
| 500 mg | $35-110 | $0.07-0.22/mg | Standard subcutaneous protocol |
| 750 mg | $60-140 | $0.08-0.19/mg | Short-term IM or daily dosing |
| 1000 mg (1g) | $70-180 | $0.07-0.18/mg | Best value for sustained protocols |
| IV kit (500mg + bag) | $100-250 | varies | Clinic infusions |
The pattern is clear: 500mg and 1000mg vials cost nearly the same per mg, but the 1g offers a buffer for IM dosing or multi-person households. The 100mg vial only makes sense if you're doing sublingual trial dosing or testing tolerance before committing.
Cheapest single-vial option: Ascension Peptides's 50% off drops the 1.0g vial to $75.00 ($0.07/mg effective) — the lowest effective price we track for buying one vial. Get the code →
Cost Per Week at Common Doses
| Daily Dose | Vial Duration (500mg) | Vial Duration (1g) | Monthly Cost (1g vial) |
|---|---|---|---|
| 50 mg/day (starter) | 10 days | 20 days | $7-27/month |
| 100 mg/day (standard) | 5 days | 10 days | $14-54/month |
| 250 mg/day (loading) | 2 days | 4 days | $35-135/month |
For current vendor-specific pricing with exact $/mg breakdowns, see our Best NAD+ Vendors comparison.
What to Look For: COA, Purity, Storage
NAD+ is chemically distinct from most research peptides. It's a dinucleotide (adenine + nicotinamide linked by a ribose-phosphate-phosphate-ribose backbone) with a molecular weight of 663.43 Da for the free acid, or 707.40 Da for the disodium salt commonly used in injections. Knowing which form you're getting matters.
What a COA (Certificate of Analysis) Should Include
Identity Confirmation
- Mass spectrometry confirming 663.43 Da (free acid) or 707.40 Da (disodium salt)
- UV-Vis spectrum showing the characteristic 260nm peak of NAD+
- Confirmation this is the oxidized form (NAD+), not NADH — these are biologically distinct
Purity Testing
- HPLC purity — look for 98%+ purity
- Chromatogram should show a single dominant peak with minimal NADH, AMP, or ADP-ribose degradation products
Contamination Testing
- Endotoxin levels (this is injected)
- Residual solvent analysis
- Heavy metals screening
Salt Form Verification
- The disodium salt is water-soluble and the injection standard
- Free-acid NAD+ requires pH adjustment to dissolve and is less common in research vendors
How to Verify a COA Is Legitimate
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Check the testing lab — Janoshik Analytical, MZ Biolabs, and Colmaric Analyticals are the standard for research-grade product. In-house testing is a red flag.
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Verify on the lab's website — Janoshik COAs have a task number that can be looked up at janoshik.com.
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Check the date — NAD+ is oxygen-sensitive and degrades over time. A COA older than 6 months may not represent current batch quality.
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Match the batch — The batch/lot number on the COA must match the label on your vial.
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Check for the salt form — If the COA doesn't specify disodium NAD+ or free acid NAD+, ask. This affects reconstitution volume and injection comfort.
