NEA Diagnostics

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Longevity

NAD+

Nicotinamide adenine dinucleotide

Sold in large milligram vials where fill accuracy is the headline metric. Cellular and longevity research.

C

Okay

Catalog average across 167 samples

95.2%

Average purity

90.8%

Average of label dose

167

Samples tested

6

Vendors ranked

Grade distribution

How the ranked vendors fall across the grade scale.

A

2

B

3

C

1

D

0

E

0

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NAD+ vendor ranking

6 vendors

RankVendorPurityOf labelGrade

01IQONUnited States99.5%100.1%A Great 02Qing Li PeptideChina98.4%99%A Great 03Astro PeptidesUnited States97.7%96.2%B Good 04Peptide SciencesUnited States97.2%99%B Good 05Amino AmigosUnited States97.1%95.1%B Good 06Peptide CraftersUnited States96.6%96.8%C Okay

Published certificates

99.84% purity, 100.3% of label, 13 Jul 2026

A

99.75% purity, 100.7% of label, 08 Jun 2026

A

99.75% purity, 100.7% of label, 04 May 2026

A

96% purity, 88.2% of label, 23 Jun 2026