Human plasma

Fresh and frozen biospecimens for research use

We offer high-quality fresh and frozen human plasma from a diverse pool of healthy, consented donors. Each sample is carefully processed to support a broad range of research applications.

High-quality human plasma for your research

Customisable to your protocol

Produced from anticoagulated whole blood with your choice of anticoagulant, volume, and donor profile ensuring compatibility with your specific assay or study.

High-integrity samples

Processed promptly to preserve protein stability and biomarker integrity, supporting reliable results in research and development.

Flexible format and delivery

Available fresh or frozen, shipped in your required volume and format — with dependable delivery across Europe to meet your project timelines.

Learn why fresh blood products matter for reliable research

Explore the research applications

Uncover disease pathways

Understand the mechanisms behind diseases, including cardiovascular disorders, immune-related conditions, and infectious diseases

Discover and validate biomarkers

Identify and quantify biomarkers for early disease detection and monitoring

Support therapy and diagnostic development

Develop and refine treatments and detection assays for clinical use

Flexible formats available to meet your needs

Frozen plasma

Samples are rapidly frozen to preserve the stability of proteins and analytes, and maintained at optimal temperatures to ensure long-term stability

Fresh plasma

Our fresh plasma biospecimens are collected and processed on-demand with next-day delivery available across Europe and same-day options in select UK locations to ensure maximum sample viability

Flexible & customisable biospecimens for your research

At Research Donors, we know that every research study is unique. Whether you’re looking for specific anticoagulants, volumes, or donor profiles, our team is here to customise your order to suit your exact requirements

Choice of anticoagulant

Choose from a variety of anticoagulants, including K2EDTA, K3EDTA, sodium heparin, lithium heparin, and sodium citrate

Flexible volumes

Available in standard volumes with the option to customise

Diverse donor profiles

Choose biospecimens based on age, sex, health status, and other relevant donor characteristics to align with your research focus

What our customers say

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"We have purchased both frozen PBMCs and Human Plasma samples from multiple donors from Research Donors. They have always maintained excellent prompt communication throughout the whole process and the quality of products and cell viability has been consistently high. The customer service really excels, and the delivery service is great."
ScientistBiVictriX Therapeutics, Alderley Park, UK

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"We’ve been using Research Donors and are very happy with their services. Samples are delivered on time and we always get a very quick response from the team. They are also very flexible and willing to discuss specific requests"
R&D ScientistNGS Company, Cambridge, UK

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"In order to obtain good quality data, it is essential to work with fresh blood samples. In the past I have ordered such samples from many suppliers, and I have found Research Donors to be absolutely the best. They offer an extremely reliable overnight delivery, a very good customer service and, most importantly, a high-quality product. They are now my only supplier for human whole blood!"
Researcher in Fresh Blood Sample AnalysisEPFL, Switzerland

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"We have been using Research Donors as our supplier of frozen human PBMC cells for over a year. The cells are always delivered promptly and arrive on the date specified at the time of ordering. Further, the viability of the cells are higher than what we have observed from alternative suppliers and the numbers of viable cells always exceeds the specification. Communication is fast, friendly, and informative and the staff were very willing to adapt the product to our needs."
Senior ScientistAnuCell Biosystems, Ireland

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"We have used the Fresh Healthy Human Blood Service on several occasions and always received a helpful and efficient turnaround to our requests. The service has enabled timely access to good quality samples and facilitated effective development of our new generation products."
Scientista Life Science Company, Cardiff, UK

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"Research Donors have provided us with an excellent service. They have worked very closely with us to ensure that the products they supply are to the specifications that we require. The buffy coats that they provide are of a consistently high quality and the option of same day delivery is very valuable."
Senior ManagerAbzena, UK

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"The blood service is always precise, and people are helpful. Samples are delivered in a timely manner and the quality of blood received from Research Donors is very high and I look forward to working with them again."
Senior Research AssociateKymab, UK

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"They provided exactly what we needed, on time and to specification. Perhaps most importantly, they did what they said they would do and maintained fabulous communication throughout the ordering process. I would certainly recommend the service to others."
General ManagerComplement Genomics, UK

How to order

Browse our inventory

Access pre-collected, frozen biospecimens from our online catalogue

1. Browse our frozen stock inventory
2. Add samples to your basket
3. Submit your request & reserve the samples
4. Your local distributor will be in touch to confirm

Search stock inventory

Request a biospecimen collection

Design a custom collection based on your specific research needs

1. Specify your sample, donor & delivery criteria
2. Add to your selection to your quote
3. Submit the request from your basket
4. Your local distributor will be in touch to confirm

Start your quote

Need assistance? Contact us for help with your order

What is plasma?

Human blood plasma is the liquid component of blood remaining after the removal of blood cells, and rich in proteins, electrolytes, antibodies, and other solutes. It serves as a critical resource in medical research, biomarker discovery, diagnostic test development, and validation.

Learn more

Right donor.
Right sample.
Right time.

If you can’t see exactly what you need, our team is ready to collaborate on custom collections designed to meet your specific requirements.

Repeat donors for longitudinal studies

HLA-matched and tailored sample collections

Flexible volumes to support large-scale studies or specific applications

If you can’t see exactly what you need, our team is ready to collaborate on custom collections designed to meet your specific requirements

Let’s discuss how we can support your project

Ordering & delivery

We prioritise fast and reliable delivery to maintain sample viability

Same-day delivery options available in select UK locations