How to read an NAD+ nasal spray certificate of analysis
What does a certificate of analysis tell you about NAD+ nasal spray?
A certificate of analysis, or COA, reports results for the sample and tests it identifies. Match the lot number and check whether the report covers the ingredient or finished spray.
The first thing to check is the lot
Imagine opening a PDF with a laboratory logo and a big purity number. Before reading the percentage, check the sample name and lot. If the bottle has lot A24 and the report says B17, ask which document applies to your bottle. If the sample is described as NAD+ powder, the test tells you something about that powder. The finished spray has its own formulation, fill and pump.
Ask each test a specific question
| Report field | Question it can help answer |
|---|---|
| Sample name, form and lot | Was this the ingredient, bulk liquid or filled product? Which lot? |
| Identity and assay | What compound did the lab identify, and what strength did it measure? |
| Specifications, method and units | How was it tested, what counts as passing, and what units describe the result? |
| Other listed tests | Does the report cover anything else relevant, such as microbial quality or consistency across sprays? |
You may need a separate document for some of those answers. A single assay doesn't establish how the pump performs, how the formulation holds up over time, or how a person responds. For nasal spray drug applications within its scope, FDA describes quality information that goes beyond a single ingredient assay. Read FDA's nasal spray quality guidance. Learn how to read mg/mL and total milligrams. Quality testing is not approval: see how to verify US drug approval.
The screenshot worth saving
Save the sample name, lot, test name and result together. The percentage only makes sense with those other details attached.