How to Read a Nattokinase Certificate of Analysis (COA)

For professional buyers, practitioners and consumers evaluating nattokinase, a product specification tells you what an ingredient is supposed to meet. A Certificate of Analysis can provide information about the results reported for a particular production lot.

Understanding the difference is important.

What Is a Certificate of Analysis?

A Certificate of Analysis, commonly abbreviated COA, is a document associated with a material, ingredient or finished-product lot that reports specifications and analytical results.

The exact format varies among manufacturers, suppliers and testing laboratories.

A COA may identify:

• product or ingredient name

• lot or batch number

• manufacturing or testing date

• specifications

• analytical results

• analytical methods

• microbiological results

• applicable contaminant testing

• approval or release information

Not every COA contains the same tests.

The appropriate testing program depends on the ingredient, product and applicable quality requirements.

Specification vs Test Result

One of the most important parts of reading a COA is distinguishing between a specification and an actual result.

A specification establishes the requirement or acceptable range.

A result reports what was measured for the particular sample or lot.

For example, a nattokinase ingredient could have an activity specification expressed in Fibrinolytic Units.

The COA should make it possible to distinguish the required specification from the reported analytical result when that activity was tested.

Check the Lot Number

A COA is most useful when it can be connected to a specific production lot.

Look for a:

Lot Number

or

Batch Number

That identifier helps establish which material the analytical results represent.

For professional purchasing and quality review, lot traceability is an important part of evaluating documentation.

Check Ingredient Identity

A COA should clearly identify the material being evaluated.

For nattokinase, this may include the ingredient name and other identifying information used by the manufacturer or supplier.

Identity is different from potency.

Before asking how active an enzyme preparation is, you first want appropriate assurance that the material is what it is represented to be.

Find the Enzyme Activity Specification

For nattokinase, enzyme activity is commonly expressed in FU — Fibrinolytic Units.

A bulk ingredient might, for example, carry a specification expressed as:

FU per gram

The specification describes the activity level the ingredient is required to meet under the applicable analytical methodology.

This is different from merely reporting the ingredient's weight in milligrams.

FU vs Milligrams

Milligrams and FU measure different characteristics.

Milligrams (mg) = weight

Fibrinolytic Units (FU) = measured fibrinolytic enzyme activity under the applicable assay

A COA reporting enzyme activity therefore provides information that cannot necessarily be determined from ingredient weight alone.

Two enzyme preparations can have the same weight but different activity specifications.

Look for the Actual Activity Result

If nattokinase activity was tested, look for the reported analytical result.

A COA may present information in columns such as:

Test

Specification

Result

Method

The exact terminology and layout vary.

The key question is:

Does the reported result meet the established specification?

Do not confuse the target specification with the actual test result.

Look at the Analytical Method

When available, review the analytical method associated with the result.

Enzyme activity values are meaningful in the context of the methodology used to determine them.

Professional buyers should therefore consider not only the number reported but also how the measurement was obtained.

Microbiological Testing

Depending on the ingredient and testing program, a COA may include microbiological specifications and results.

Examples can include testing or limits relating to:

• total aerobic microbial count

• yeast and mold

• specified microorganisms

The exact panel and acceptance criteria depend on the material and applicable quality program.

Do not assume that every COA includes the same microbiological tests.

Contaminant and Purity Testing

Depending on the ingredient, supplier and quality program, documentation may also address contaminants or other quality parameters.

Examples may include:

• heavy metals

• residual solvents, when applicable

• moisture

• other ingredient-specific specifications

Again, the presence of a particular test should not be assumed simply because a document is called a COA.

Review what was actually tested.

Supplier COA vs Independent Testing

Another useful question is:

Who performed the analysis?

Testing may be conducted by a manufacturer, ingredient supplier or independent laboratory, depending on the quality program.

A supplier-generated COA and independent third-party laboratory testing are not necessarily the same thing.

When evaluating documentation, identify the source of the reported result whenever possible.

Why COAs Matter for Enzymes

Enzymes present an important distinction between quantity and activity.

Knowing that a preparation contains a particular number of milligrams does not necessarily establish its enzymatic activity.

For nattokinase, FU provides an activity measurement.

A properly documented activity result can therefore provide information that ingredient weight alone cannot.

What a COA Does Not Prove

A COA is an analytical quality document.

It does not automatically establish that a product:

• produces a particular clinical outcome

• prevents disease

• treats disease

• is clinically superior to another product

Likewise, a high FU result should not automatically be described as proof of superior overall product quality.

Activity is one component of product evaluation.

Questions Professional Buyers Can Ask

When evaluating nattokinase documentation, useful questions include:

1. What is the exact ingredient identity?

2. What lot does this COA represent?

3. What is the stated activity specification?

4. What was the reported activity result?

5. What analytical method was used?

6. Who performed the testing?

7. What microbiological specifications were evaluated?

8. What contaminant testing was performed?

9. Does the documentation correspond to the lot being purchased?

10. Is additional testing documentation available?

These questions can help distinguish meaningful analytical documentation from a simple marketing potency statement.

The Bottom Line

A nattokinase COA should be read as an analytical document, not simply as a potency advertisement.

Pay particular attention to:

Identity

Lot number

Specification

Actual result

Analytical method

Microbiological testing

Applicable contaminant testing

Source of testing

For nattokinase specifically, understanding the relationship between milligrams and FU makes the activity portion of a COA considerably easier to interpret.

Continue Learning

To understand enzyme weight versus activity, read:

Enzyme Potency Explained: Milligrams vs Activity Units

To understand FU specifically, read:

What Does FU Mean in Nattokinase?

Disclaimer

This information is provided for educational purposes and is not intended to diagnose, treat, cure, or prevent any disease.