Ingredient application lab · For brands
Test the active before you commit.
Before a new active goes into your product, CSL formulation chemists test it in your base: whether it delivers what the supplier claims, the level it needs, whether it stays stable and compatible, and which grade gives the best result for the cost.
Guires Cosmetic Science Lab
Choose the right active with Guires CSL
Guires CSL helps brands choose between competing actives with side-by-side application testing in your own base formula, so the ingredient you pick delivers the claim, stays stable and fits your cost and market rules.
Start your project with Guires CSLWhat's included
The work, in detail.
Supplier claims checked in your base
The active tested in a base like your product, so you see performance in your formula rather than only in the supplier’s data.
Use level set for performance and cost
Dose-response across levels to find the lowest level that delivers, keeping cost and irritation risk down.
Grades and suppliers compared
Two or more grades or suppliers of the same active compared side by side for performance, stability and price.
Stability and compatibility
The active checked for stability in your base and for compatibility with the rest of your formula and pack.
Prototype ready to develop
A working prototype with the chosen active, ready to move into full product development with CSL.
Deliverables
What you receive.
How it runs
Step by step.
- BriefYour product, the active and the claim you want
- PlanBases, levels and grades to compare
- TestingFormulation, stability, compatibility and efficacy
- DecisionReport and recommendation
- DevelopmentOptional move into full product development
Questions
Asked before we start.
Can you test an active the supplier has only just launched?
Yes. Send the supplier’s sample and documentation; CSL checks performance in your base and the regulatory status in your markets.
Will the supplier see our results?
No. Results belong to you and are not shared with suppliers unless you ask.
Does this replace product development?
No. It answers the ingredient question first, so product development starts with the right active at the right level.
Also on this service
Explore further.
Start a project
Create your next product with CSL.
Our formulation chemists, testing scientists and regulatory specialists work alongside your team, from the first brief to a market-ready product. Bring a brief, a benchmark or just an idea: a scientist will reply within one working day with next steps and an indicative scope.