Human Serum Samples

Human Serum for Research

Our human serum samples are sourced from IRB-consented donors and processed within 24 hours of collection to support consistent, high-quality research use. We offer both healthy-donor and patient serum samples, matched to your study criteria and available in standard or custom volumes. Browse our full range of human serum products in our catalog to get started.

What Is Human Serum?

Human serum is the clear, liquid fraction of blood that remains after the blood has clotted and the clot (including cells and clotting factors such as fibrinogen) has been removed. Serum contains proteins, electrolytes, antibodies, antigens, hormones, and metabolites, but — unlike plasma — it contains no fibrinogen or other clotting factors. This makes serum a preferred matrix for many biomarker, antibody, and diagnostic assays.

Serum vs. Plasma

The key difference is how the sample is processed: serum is collected after blood is allowed to clot (no anticoagulant), while plasma is collected with an anticoagulant (EDTA, heparin, or citrate) so the sample stays liquid and retains clotting factors. Serum is typically chosen for serology and many immunoassays; plasma is chosen when clotting factors or the fastest processing are required. For help choosing, see our guide to choosing between serum and plasma.

Off-the-Clot vs. AB Serum

Off-the-clot serum is produced by allowing blood to clot naturally and separating the serum, preserving native analyte levels for research. Human AB serum is pooled serum from type-AB donors (lacking anti-A and anti-B antibodies), commonly used as a cell-culture supplement. Sanguine can supply single-donor off-the-clot serum as well as defined pooled human serum (pooled human sera) to match your protocol.

Normal Human Serum (NHS)

Normal human serum — also called healthy human serum or NHS — is serum from screened donors with no diagnosed condition relevant to your study. It is the standard control matrix and assay diluent for immunoassay development, and the baseline arm in any case-control design. Available as:

• Single-donor normal human serum — preserves individual variation, and the right choice when you need donor-level demographic or genotype linkage
• Pooled normal human serum — averages out individual variation for a consistent, reproducible matrix across a study
• Demographically matched controls — age- and sex-matched to a disease cohort, which is usually the correct comparator rather than convenience controls

Pooled Human Serum Specifications

Pooled human sera are prepared to defined specifications so that results are reproducible across a programme:

• Pool size — specified donor count per lot; larger pools give tighter analyte consistency
• Blood type — AB pools for cell culture, or mixed/type-specific pools on request
• Filtration — 0.2 µm sterile-filtered on request
• Heat inactivation — available where complement activity must be removed
• Lot reservation — reserve a single lot for the duration of a study to eliminate lot-to-lot variability as a variable

Volumes and Formats

• Aliquots from 1 mL upward, specified to your assay layout
• Fresh or frozen human serum; frozen shipped on dry ice
• Custom aliquot counts to minimise freeze-thaw cycles
• Bulk serum volumes available for assay manufacturing and validation programmes

Product Features

• Human serum samples collected from healthy (normal) donors and patient serum donors
• Single-donor off-the-clot serum and pooled serum available
• Fresh or frozen human serum available in standard or custom volumes
• Serum samples for research use only (RUO)
• Processed within 24 hours of collection
• Collected under IRB-approved, HIPAA-compliant protocols

Donor Metadata

• Age, sex assigned at birth, and ethnicity
• Physician- or specialist-confirmed diagnosis (healthy or disease-state)
• Donor-reported allergy, medication, and infectious disease history
• Infectious disease marker testing results

Applications

• Biomarker discovery and validation
• Serum cytokine and protein profiling
• Serology and antibody detection assays
• Immunoassay and diagnostic assay development
• Control and calibrator matrix preparation
• Cell culture supplementation (AB serum)
• Controls for therapeutic candidate screening and validation

Disease-State Serum Samples

Looking for disease state serum? Sanguine supplies confirmed disease-state serum specimens across 100+ conditions, including:

• Systemic Sclerosis Serum
• Interstitial Lung Disease Serum
• Anemia Serum
• Acromegaly Serum
• MPS II Hunter Syndrome Serum

For other specimen types from the same donor pool, see our human plasma, human whole blood, and human PBMCs.

Compliance and Quality Assurance

• IRB-approved and HIPAA-compliant collection protocols
• Electronic informed consent with 21 CFR Part 11-compliant e-signatures
• Documentation support available for regulatory review

Patient Serum Samples for Research

Access patient serum samples and healthy donor serum samples for research with custom donor criteria, documentation support, and flexible ordering options.

Ordering and Customization

Purchase human serum samples from Sanguine in standard or custom volumes. For international orders or documentation requirements, please email learnmore@sanguinebio.com to ensure compatibility with your country’s regulations.

Frequently Asked Questions About Buying Human Serum

Where can I buy human serum for research?

Browse the in-stock human serum samples above or request a quote. Sanguine is a human serum supplier and vendor offering off-the-clot and AB serum from healthy and disease-state donors.

Do you supply normal human serum for use as a control?

Yes — normal (healthy) human serum is available as single-donor or pooled material, and can be demographically matched to a disease cohort for case-control work.

Do you supply disease-state and patient serum specimens?

Yes — human serum specimens are available across 100+ confirmed conditions plus healthy controls.

Is off-the-clot and AB serum available?

Yes — single-donor off-the-clot serum and pooled human AB serum are available in fresh or frozen formats.

Can I reserve a single pooled lot for my whole study?

Yes. Lot reservation is available, which removes lot-to-lot variability as a confounder across a long programme.

What is the smallest volume you supply?

Aliquots start at 1 mL and are specified to your assay layout. Tell us your per-assay volume and replicate count and we will confirm what is achievable.

How much does human serum cost?

Human serum pricing depends on donor type (healthy or disease-state), format (off-the-clot or AB), and fresh vs. frozen. Request a quote for current human serum pricing and volume discounts.