What is human patch test?

Human patch test is performed to evaluate the potential skin reaction (mainly primary irritation) in response to a single exposure of cosmetic products. The test sample (cosmetic product) is applied to the skin test sites of the subjects via a patch at a suitable concentration for 24 hours. The evaluation of skin reaction will be observed and assessed at 30mins (or 1 hour), 24 hours and 48 hours after removal of the patch.

A group of 30 subjects will be recruited in this study, which is carried out by professional experts and supervised by qualified dermatologists. 

How is the test conducted?

The study is conducted on 30 subjects with observation and assessment at several time points after removal of the patch under professional experts and qualified dermatologists.

Can I select skin type of human subjects for the study?

Yes. We offer normal skin type or sensitive skin type. Please contact us to get more understanding of the test design. 

How long will the test take?

It takes around 1 month for a study. 

How much sample should be submitted for the test?

Please submit minimum 200g or 200mL per product for one study.