When should you test a new product? Learn how testing before, during and after formulation can reduce development risks and support regulatory compliance.

Absolutely. I’ll keep the Makrolife posts in English and make the readability a priority: short paragraphs, varied sentence openings, plenty of transition words, clear H2 structure, and a natural focus keyphrase.

When Should You Test a New Product? Before, During or After Formulation?

Developing a new product involves more than creating a good formula.

Testing also needs to happen at the right time.

Many companies wait until the formulation is finished before they contact a laboratory. That can work for some tests. However, it can also create unnecessary delays when a problem is discovered late in development.

A better approach is to treat testing as part of the product development process, rather than as the final step before launch.

So when should you actually test a new product?

The answer depends on what you need to learn.

Testing should start before the formula is finished

Testing does not always mean sending the final product to a laboratory.

Early in development, testing can help answer important questions about:

raw materials
active ingredients
contaminants
compatibility
microbiological risks
product performance
regulatory requirements

This information can influence the formulation before it becomes difficult or expensive to change.

For example, a manufacturer may discover that a planned ingredient has an impurity issue. If that happens early, the formulation can be adjusted before stability studies, packaging decisions and regulatory documentation are finalised.

That is much easier than discovering the same issue after the product has already been prepared for launch.

Stage 1: Test the raw materials

Before testing the finished product, it can be useful to understand the materials going into it.

Depending on the product, relevant checks may include:

identity
purity
microbiological quality
heavy metals
residual solvents
contaminants
active ingredient content

The exact testing programme depends on the ingredient and intended use.

A supplier’s Certificate of Analysis can provide valuable information. However, it does not automatically replace independent testing or a risk-based assessment.

Makrolife supports analytical testing across areas including food, supplements, pharmaceuticals, cosmetics, medical devices and food-contact materials. Makrolife Biotech

Why raw material testing matters

A finished product can only be as controlled as its inputs.

Suppose an ingredient specification allows a certain impurity level.

That impurity may then carry into the finished formulation.

If you identify the issue before formulation, there are more options available.

You could:

change the supplier
request a tighter specification
select a different raw material
adjust the formulation
introduce an additional purification step

Once the final product is already manufactured, those options become much more expensive.

Stage 2: Test during formulation

Testing can also take place while the formula is still being developed.

At this stage, the goal is often not regulatory approval.

Instead, testing helps answer:

Does the formulation behave as expected?

Depending on the product, this could involve:

pH
viscosity
active ingredient concentration
microbiological quality
compatibility
physical stability
preservative effectiveness
performance testing

This information can guide formulation decisions.

As a result, the laboratory becomes part of the development process rather than simply a final checkpoint.

A small formulation change can have a big effect

Changing one ingredient can affect several parts of a product.

For example, changing:

the preservative
fragrance
emulsifier
active ingredient
solvent
pH
packaging

can alter stability or microbiological behaviour.

Therefore, a formula that looks almost identical on paper may still require additional testing.

The earlier that change is identified, the easier it is to evaluate.

Stage 3: Test the prototype

Once the formulation is sufficiently developed, prototype testing becomes more meaningful.

At this point, you can start asking whether the product is likely to meet its intended specifications.

Depending on the product category, this may include:

Analytical testing

Does the product contain the expected amount of the active or relevant ingredients?

Microbiological testing

Does it meet the required microbiological quality?

Stability testing

Does the product remain within specification over time?

Safety-related testing

Are there specific risks that need to be investigated?

Performance testing

Does the product actually deliver the intended function?

The testing programme should be linked to the product’s risks and intended claims.

Stage 4: Stability testing

Stability testing should not be treated as something that happens only after every other decision has been made.

For many products, stability data can influence:

shelf life
storage conditions
packaging
formulation
product specifications

For cosmetics, for example, Makrolife provides accelerated stability and compatibility testing to support shelf-life assessment and product documentation. Makrolife Biotech

Starting stability work too late can therefore delay the entire launch.

Why stability testing takes time

Some product decisions simply cannot be accelerated indefinitely.

A stability study needs sufficient time to observe how the product changes under defined conditions.

Depending on the product, researchers may monitor:

appearance
odour
pH
viscosity
active content
microbiological quality
packaging compatibility

If a company waits until the planned launch date is approaching, there may not be enough time to generate the required data.

That is why stability testing belongs in the development timeline.

Stage 5: Test the final formulation

Once the formulation is frozen, final testing becomes important.

The objective now changes.

You are no longer asking:

“Can we improve this formula?”

Instead, you are asking:

“Does this final product meet its defined requirements?”

Depending on the product, final testing can support:

specifications
quality control
safety assessments
regulatory documentation
product release
claims

This is where the analytical data become part of the final evidence package.

Cosmetics are a good example

For cosmetics placed on the EU market, the safety assessment needs to consider the final product and relevant supporting information.

The Cosmetic Product Safety Report is required before a cosmetic product is placed on the EU market under Regulation (EC) No 1223/2009. [European Commission, Cosmetic Products, https://single-market-economy.ec.europa.eu/sectors/cosmetics/cosmetic-products_en] Makrolife Biotech

The supporting evidence can include information about the formulation, toxicology, microbiology and stability.

Consequently, testing should not be treated as a completely separate activity from regulatory preparation.

Food and supplements need a different approach

Food products and supplements have their own testing priorities.

Depending on the product, testing may focus on:

nutritional composition
active ingredients
contaminants
microbiological quality
allergens
heavy metals
pesticide residues
stability
product specifications

The exact programme depends on the product, ingredients and intended market.

Makrolife specifically provides testing and studies for food and supplements, including analyses of ingredients, purity and specifications. Makrolife Biotech

Therefore, the testing strategy should be defined around the product rather than copied from another category.

Testing too early can also be inefficient

There is an important balance.

Testing everything at every stage is not a good strategy.

An early prototype may change several times.

If you perform a full final-product testing programme on every prototype, costs can increase without generating useful long-term data.

Instead, testing should follow the development stage.

Early stage: answer development questions.

Middle stage: identify risks and optimise the formulation.

Final stage: generate evidence for specifications, safety and compliance.

That is a more efficient approach.

A risk-based testing plan works better

There is no universal testing checklist that fits every product.

A face cream, dietary supplement and medical device have completely different risk profiles.

Therefore, the testing plan should consider:

product category
intended use
ingredients
target population
exposure
manufacturing process
packaging
claims
applicable regulations
intended market

Once these factors are clear, the required tests become easier to identify.

What happens if you wait until the end?

Imagine a company develops a product for six months.

The formula is final.

The packaging is selected.

The marketing materials are ready.

Then laboratory testing identifies a stability problem.

The formula needs to change.

Now the company may need to reconsider:

packaging
stability studies
safety documentation
specifications
labels
claims
launch timing

The original delay was not caused by the laboratory.

It was caused by testing being introduced too late.

Testing should follow the product development timeline

A practical development timeline can look like this:

Concept

↓

Raw material assessment

↓

Prototype formulation

↓

Targeted testing

↓

Formula optimisation

↓

Stability and compatibility

↓

Final formulation

↓

Regulatory and safety documentation

↓

Final verification

↓

Launch

The exact sequence can change.

However, the principle remains the same:

Testing should provide information when that information can still influence a decision.

What should you test before formulation?

Before the formula is fixed, focus on information that can influence the design.

Depending on the product, that may include:

raw material purity
contaminant risks
active ingredient identity
regulatory restrictions
microbiological risks
compatibility questions

This stage is about reducing uncertainty.

What should you test during formulation?

During formulation, the questions become more specific.

You may want to know:

Is the active stable?
Does the preservative system work?
Is the formulation microbiologically controlled?
Does the pH remain suitable?
Are ingredients compatible?
Does the product maintain its intended characteristics?

These tests help the R&D team make better formulation decisions.

What should you test after formulation?

Once the formula is frozen, the focus shifts toward verification.

Depending on the product, that can include:

final product specifications
stability
microbiology
active content
contaminants
safety-related parameters
packaging compatibility
claim substantiation

At this point, the results are much more likely to become part of the final technical and regulatory documentation.

Testing and regulatory work should be connected

A common mistake is to treat laboratory testing and regulatory compliance as two separate projects.

They are closely connected.

A regulatory requirement can determine what needs to be tested.

The resulting analytical data can then support the regulatory assessment.

Makrolife combines laboratory analysis with regulatory and compliance services, including technical documentation, conformity assessments and market-access support. Makrolife Biotech

That connection can make the development process more efficient.

Your testing plan should answer four questions

Before commissioning a test, ask:

1. What decision will this test support?

If there is no clear decision, the test may not be necessary yet.

2. What stage is the product in?

A prototype does not always need the same testing as a final product.

3. What regulatory requirement applies?

The intended market and product category can change the testing requirements.

4. What happens if the result fails?

A failed test is much easier to manage when there is still time to reformulate or change the process.

The goal is not to test everything

More testing does not automatically mean better product development.

The goal is to generate relevant, reliable evidence at the right time.

That means testing should be:

risk-based

purpose-driven

appropriate to the product

and connected to the development timeline.

This approach can reduce unnecessary testing while still protecting product quality and compliance.

When should you test a new product?

The short answer is:

Before, during and after formulation.

The tests simply serve different purposes at each stage.

Before formulation

Understand the raw materials, risks and regulatory constraints.

During formulation

Use testing to guide development and identify problems early.

After formulation

Verify the final product and generate evidence for quality, safety and compliance.

Waiting until the final product is ready is often too late.

The Makrolife approach

Makrolife supports product development with analytical testing, validation, regulatory consulting and safety assessments across several industries, including healthcare, medical devices, cosmetics, food and nutrition. Makrolife Biotech

The advantage of connecting these services is straightforward:

testing can be planned around the actual product development and regulatory pathway.

Instead of asking a laboratory to test a finished product without context, companies can define what information they need at each stage.

That makes the results more useful for R&D, quality and regulatory teams.

The bottom line

Testing should not be the final hurdle before a product launch.

It should be part of the development strategy from the beginning.

Early testing can identify raw-material and formulation risks.

Testing during development can guide formulation decisions.

Final testing can verify the finished product and support regulatory documentation.

The best time to test is therefore not simply “after formulation.”

It is whenever the result can still help you make a better decision.

For a new product, that usually means starting early, testing selectively and increasing the level of verification as the formulation moves toward launch.