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Frequently Asked Questions

We don’t use a Purchase Order system or else Purchase Orders take a long time to issue in my organisation. Can I still start my study?

Yes. In these circumstances, we will usually issue the invoice at the beginning of the study and ask for payment within 30 days.

When will I receive my final report?

Most of our tests take 6-8 weeks from receipt of your sample to the first draft report, although please note sometimes it can be slightly shorter or longer depending on the test. We ask for your comments on the draft report within a week, and your final report will be with you after we’ve then completed our final QA checks.

Does XCellR8 offer human patch testing?

No, we don’t but many clients use our in vitro tests as an early screen in product development before they get to more expensive human trials. They can also be used to generate supporting information in a weight-of-evidence approach to safety assessment. XCellR8’s tests may give you a binary classification on the effect of an ingredient, for example, Irritant or Non Irritant, or a more detailed classification to help you rank irritation potential. Please get in touch if you’d like to find out more.

How long will my test take?

XCellR8’s tests can take as little as 4 weeks, up to a maximum of 12 weeks. We’ll always try our best to accommodate urgent requests. Please do bear in mind that the timeframe starts at the point we receive your sample and the accompanying information that we ask for in order to start a study, and finishes when we send your draft report.

What do you need from me to start a test?

Firstly, we ask you to approve our quote and send us a PO number. We’ll then ask you to fill in an information sheet about your product or ingredient which includes some information such as the lot number, expiry date, purity and storage conditions required. We’ll ask for a description of the item (its name, colour and physical state) which will need to match the sample you supply. For some tests, we’ll also ask you to supply the molecular weight. If you have a Material Safety Data Sheet (MSDS), please also send us that. And last but definitely not least, we’ll need a sample of the item(s) you want to test sent to our laboratory in Cheshire, UK. 10ml if it’s a liquid or 10g if it’s a solid.

Where do you get your human cell cultures from?

We have long standing relationships with global biotechnology companies who we buy our tissue models from. They source them from consenting donors, usually as a by-product of cosmetic surgery.