For Researchers - Search Now For Contributors - Join Now


iSpecimen sources a broad range of biofluids, from both healthy patients and those with medical conditions, across thousands of different analytes with corresponding test results. In addition to biofluids, we source solid tissue and viable cells.

Biofluids are available fresh or frozen and with or without additives, such as EDTA, Lithium Heparin, and Sodium Citrate. Some examples of the types of biofluids we provide include:

  • Whole Blood
  • Plasma
  • Serum
  • Buffy Coats
  • Urine
  • Stool
  • CSF
  • Liquid Cytology
  • Swabs
  • Saliva
  • Sputum

Cover Thumbnail Biofluids

Get the Details

Learn how iSpecimen makes it easy to procure remnant, banked, and prospectively collected biofluids for research.

Download Data Sheet

a test tube icon tilted

high quality biofluid specimens

Through the iSpecimen Marketplace, we match qualifying samples and associated data from our diverse network of hospitals, labs, biobanks, blood centers, and other clinical organizations to biomedical researchers’ specimen requests. 



  • Standard Research Samples
  • Clinical Remnants
  • Banked
  • Prospective Collections
  • Custom Collections

  • Cancer
  • Autoimmune
  • Gastrointestinal
  • Central Nervous System
  • And many more…



We offer a range of services for custom and prospective collections, including site selection and training, custom kitting, and compliance management. For a full list of custom collection services, download our data sheet.

three test tubes for specimen procurement and processing

recent biospecimen projects and collections


  • Thyroid Disease – serum: 200 patients total, 1.5ml each, frozen, from patients with treated

and untreated Grave’s Disease, Hashimoto’s, and thyroid disease other than Grave’s. Anti-

TSHR < 1.75 IU/L (100 pts), 1.75-8.75 IU/L (50 pts), and 8.75-40 IU/L (50 pts). Data to include

DOS (Jan 2017 or later), dx, tx status, basic demographics, test method and result.

  • AML – fresh whole peripheral blood EDTA or sodium heparin. 20 donors, 15ml each. Absolute

wbc ≥20,000, blasts ≥10%, known HIV and HCV status.

  • Prostate Ca – remnant serum: 200 donors, 1ml each.
Test Tube icon with cells

biospecimen collection and custom Study Design

We work with iSpecimen Partner sites to collect, process, and ship biological specimens. Most biospecimens are shipped to iSpecimen and go through our QA process before being sent to researchers. We also offer additional processing services, such as DNA extraction.

When you require a custom collection of biofluid samples, iSpecimen Concierges are here to help. They can also help with study design, site selection, and compliance management, in addition to specimen collection, processing, and shipping.

The iSpecimen Marketplace

Search for Samples and Data Today

Create a login in seconds, for free, with no obligation. Gain immediate access to our real-time sample inventory today.

Already signed up?  Login to search our updated inventory.

Sign Up to Search the Marketplace