What is reflux?

Reflux disease is a common condition, where the stomach contents passes back up into the oesophagus.

How does Peptest work?

Peptest is an accurate, painless and inexpensive test that tells you quickly and conclusively if you have reflux disease.

Medical Professionals

Discover the medical experts using and researching Peptest and how we can work with you in your medical setting.

Order Peptest Online

Peptest reflux diagnostic kits are available in a choice of two or three sample tubes.

Latest research

Peptest is a unique testing kit developed by UK-based RD Biomed that measures a patient’s saliva/sputum for levels of pepsin, an enzyme found only in the stomach.

Read the latest research from scientists and medical researchers using Peptest.

What people are saying…

Using Peptest, the high levels of pepsin in my saliva confirmed I was refluxing but also the levels involved and when it was happening.

Muriela (patient)

After taking Peptest, my results showed very high levels of pepsin, especially after my midday and evening meals.

Ian (patient)

Within 48 hours I received my results showing that I had high levels of pepsin present in my saliva.

Garry (patient)

I’ve been using Peptest for over a year now. It’s a completely non-invasive test that just involves spitting into a tube.

Mr Mark Watson (Surgeon)


...say Peptest instructions are easy to follow


....consider Peptest to be good value


....would consider using Peptest again


... are satisfied with their diagnosis

* According to customer research

Peptest Logo


Peptest™ is a single use in-vitro diagnostic device not for ingestion. It conforms to the European Directive 98/79/EC on in-vitro Diagnostic Medical Devices; this is shown by the CE mark of conformity.

Peptest™ kits are manufactured in the UK by RDBiomed Limited – a private limited company registered in England and Wales with number 06979218.

RDBiomed Limited
Daisy Building (2nd Floor)
Castle Hill Hospital
Castle Road
HU16 5JQ, UK

VAT Number: GB 990 1918 96