While many laboratories offer cosmetic testing services, they do not all provide the same level of expertise, scope of services or technical support. Choosing the right partner is therefore about much more than comparing prices.
Understanding what to look for in a cosmetic testing laboratory helps manufacturers obtain reliable data and build a testing programme that is appropriate for their products and compliant with the European regulatory framework.
What is the role of a cosmetic testing laboratory?
A cosmetic testing laboratory generates the technical evidence needed to evaluate different aspects of a product, such as its stability, microbiological quality, preservative efficacy or the performance of specific claims.
These laboratory results contribute to the documentation supporting the Cosmetic Product Safety Report (CPSR) and help manufacturers demonstrate that products placed on the European market meet the safety expectations established by Regulation (EC) No 1223/2009.
Although the laboratory performs the testing, the manufacturer and the Responsible Person remain responsible for ensuring that sufficient evidence has been generated.
Look for cosmetic-specific experience
Not every analytical laboratory specialises in cosmetics.
Cosmetic formulations differ significantly from pharmaceuticals, food products or chemicals. Ingredients, packaging systems, preservation strategies and intended use all require sector-specific knowledge.
A laboratory with experience in cosmetic testing is more likely to recommend appropriate study designs, recognise formulation-specific challenges and understand the practical requirements of cosmetic manufacturers.
This expertise becomes particularly valuable when developing innovative formulations or products with complex packaging.
Check the range of testing services
Many manufacturers benefit from working with a laboratory that offers multiple cosmetic testing services.
For example, stability studies, microbiological testing, preservative efficacy testing and packaging compatibility assessments are often performed during the same development project.
Using a laboratory capable of coordinating several complementary studies can simplify project management and reduce administrative complexity. It also allows different laboratory evaluations to be planned more efficiently.
If additional testing is required later, an established relationship with the same laboratory often makes the process smoother.
Accreditation and quality systems
Laboratories should operate according to recognised quality management principles.
Many cosmetic laboratories perform testing within quality systems based on ISO/IEC 17025, the international standard for the competence of testing and calibration laboratories. Accreditation demonstrates that specific laboratory activities have been independently assessed for technical competence.
However, accreditation alone should not be the only selection criterion.
Some specialised cosmetic studies may be performed outside the scope of accreditation while still following scientifically robust procedures. It is therefore useful to understand which services are accredited and how the laboratory manages quality across all its activities.
Scientific guidance rather than standard packages
A good cosmetic laboratory does more than perform laboratory analyses.
Testing requirements vary according to the formulation, packaging, intended claims and microbiological risk of each product. Laboratories should therefore be able to explain why certain studies are recommended rather than simply offering identical testing packages for every cosmetic.
The ability to discuss technical options and adapt the testing programme to the characteristics of the product is often a sign of genuine cosmetic expertise.
Besides, communication is essential as laboratory testing is rarely a one-step process and manufacturers may need advice before testing begins, clarification while studies are in progress or support when interpreting the final results.
Clear communication helps prevent misunderstandings, particularly regarding sample requirements, expected timelines, reporting and any additional information the laboratory may need.
Responsive technical support is especially valuable for companies launching cosmetic products for the first time.
Consider turnaround times
Testing schedules vary depending on the laboratory and the type of study.
Routine microbiological analyses can often be completed relatively quickly, while stability studies and preservative efficacy testing naturally require much longer because they involve observation over time.
When discussing timelines, it is helpful to distinguish between the duration of the laboratory study itself and the laboratory’s availability to begin the project.
Choosing a laboratory with realistic scheduling and good project planning can help manufacturers coordinate product development more effectively.
Transparent pricing matters
Laboratory quotations should clearly explain which studies are included and what each service covers.
Because cosmetic testing programmes vary from one product to another, a single fixed price is rarely appropriate. Transparent quotations allow manufacturers to understand how the total cost is calculated and compare services more accurately.
The lowest quotation is not always the most economical choice if important studies are omitted or later need to be repeated.
Reliable laboratory data often saves considerably more time and expense than selecting the cheapest testing option.
Questions worth asking before choosing a laboratory
Before selecting a testing provider, manufacturers may wish to consider questions such as:
- Does the laboratory regularly work with cosmetic products?
- Which testing services are performed in-house?
- Are recognised standards and scientific guidelines followed?
- What quality systems support the laboratory’s work?
- Are turnaround times realistic?
- Is technical support available throughout the project?
- Are quotations clear and transparent?
The answers often provide a better indication of laboratory quality than price alone.
Choosing the right long-term partner
Many cosmetic companies continue working with the same laboratory across multiple product launches.
A laboratory that understands the manufacturer’s formulations, packaging and regulatory requirements can often provide more efficient support as the product portfolio grows.
Developing this long-term relationship also improves communication and helps testing programmes become more consistent over time.
At Certified Cosmetics, we believe that laboratory testing should be both scientifically sound and straightforward for manufacturers. Alongside a wide range of cosmetic testing services, we provide transparent pricing and technical guidance to help brands choose the most appropriate testing programme for their products. More information is available on our website.
