{"id":25,"date":"2026-04-26T12:09:16","date_gmt":"2026-04-26T12:09:16","guid":{"rendered":"https:\/\/wheat-quail-856400.hostingersite.com\/?page_id=25"},"modified":"2026-11-09T11:18:31","modified_gmt":"2026-11-09T10:18:31","slug":"humanserum","status":"publish","type":"page","link":"https:\/\/seamlessbio.de\/de\/human-serum\/","title":{"rendered":"Humanserum Standard"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"25\" class=\"elementor elementor-25\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a3a4b1c e-con e-atomic-element e-flexbox-base e-default-div e-a0c43f0 \" data-id=\"a3a4b1c\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"a3a4b1c\" data-e-type=\"e-flexbox\" data-id=\"a3a4b1c\">\n    \t\t<div class=\"elementor-element elementor-element-bf680b5 elementor-widget elementor-widget-html\" data-id=\"bf680b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<!-- ============================================================\n  SEAMLESSBIO WORDPRESS \u2014 ELEMENTOR HTML WIDGET\n  PAGE: Human Serum Standard (Mixed Donors)\n  URL SLUG: \/human-serum\/  \u2190 NICHT \u00c4NDERN\n\n  YOAST SEO:\n  SEO Title:       Human Serum | Mixed Donors | EU & US Origin | SeamlessBio\n  Slug:            human-serum\n  Focus Keyword:   human serum mixed donors\n  Meta Description: Human serum from mixed donors \u2014 EU and US certified donor centres. Cost-effective grade for general cell culture, diagnostic assay development and teaching labs. Heat inactivated or gamma irradiated on request. No MOQ. 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text-transform: uppercase; padding: 16px 36px; border-radius: 50px; }\n\n\/* MOBILE *\/\n@media (max-width: 900px) {\n  .sb-hs-hero { grid-template-columns: 1fr; padding: 36px 28px; }\n  .sb-hs-hero-img { display: none; }\n  .sb-hs-hero h1 { font-size: 30px; }\n  .sb-hs-usps { grid-template-columns: repeat(2, 1fr); }\n  .sb-hs-twocol { grid-template-columns: 1fr; gap: 32px; }\n  .sb-hs-qs-grid { grid-template-columns: repeat(2, 1fr); }\n  .sb-hs-related { grid-template-columns: repeat(2, 1fr); }\n  .sb-hs-info { grid-template-columns: 1fr; }\n}\n@media (max-width: 480px) {\n  .sb-hs-hero { padding: 28px 20px; }\n  .sb-hs-hero h1 { font-size: 26px; }\n  .sb-hs-usps { grid-template-columns: 1fr; }\n  .sb-hs-qs-grid { grid-template-columns: 1fr; }\n  .sb-hs-related { grid-template-columns: 1fr; }\n  .sb-hs-cta { padding: 36px 20px; }\n  .sb-hs-cta h2 { font-size: 22px; }\n  .sb-hs-compare { font-size: 12px; }\n  .sb-hs-compare th, .sb-hs-compare td { padding: 10px 10px; }\n}\n<\/style>\n\n<div class=\"sb-hs\">\n\n  <!-- BREADCRUMB -->\n  <div class=\"sb-hs-bc\">\n    <a href=\"https:\/\/seamlessbio.de\/\">Home<\/a> \/\n    <a href=\"https:\/\/seamlessbio.de\/human-sera-plasma-and-more\/\">Human Sera &amp; Plasma<\/a> \/\n    <strong>Human Serum Standard<\/strong>\n  <\/div>\n\n  <!-- HERO -->\n  <div class=\"sb-hs-hero\">\n    <div>\n      <div class=\"sb-hs-eyebrow\">SeamlessBio \u2014 Human Sera &amp; Plasma<\/div>\n      <h1>Human Serum<\/h1>\n      <p class=\"sb-hs-hero-desc\">Mixed donors, Type AB, off-the-clot and male-only \u2013 human serum from certified EU and US donor centres. This page covers the mixed-donor grade; every other grade is one click away in the quick selection below. Heat inactivated or gamma irradiated on request. No minimum order.<\/p>\n      <div class=\"sb-hs-btns\">\n        <a class=\"sb-hs-btn-dark\" href=\"https:\/\/seamlessbio.de\/contact\/\">Request Information<\/a>\n        <a class=\"sb-hs-btn-outline\" href=\"https:\/\/seamlessbio.de\/product-category\/human-sera\/\">View in Shop<\/a>\n      <\/div>\n    <\/div>\n    <div class=\"sb-hs-hero-img\">\n      <img decoding=\"async\" src=\"https:\/\/seamlessbio.de\/wp-content\/uploads\/2026\/06\/human-serum-flasche.png\" alt=\"Human Serum Mixed Donors EU US Origin \u2014 SeamlessBio\" onerror=\"this.style.display='none'\">\n    <\/div>\n  <\/div>\n<!-- BUY BOX (SEO: links to product pages) -->\n<div class=\"sb-buy-box\" style=\"border:1px solid #cfe9e6;background:#f4fbfa;border-radius:12px;padding:22px 26px;margin:28px auto;max-width:1200px;box-sizing:border-box\">\n<h2 style=\"font-size:22px;line-height:1.3;margin:0 0 6px\">Buy human serum from our EU stock<\/h2>\n<p style=\"margin:0 0 14px\">Request a quote or a free test sample \u2013 EU stock, no minimum order, lot reservation up to 36 months.<\/p>\n<ul style=\"margin:0;padding-left:20px;columns:2 300px;column-gap:32px\">\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/human-serum-type-ab-male-eu-us-origin-sterile\/\">Human Serum Type AB Male \u2013 EU\/US origin<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/human-serum-type-ab-mixed-donors-eu-us-origin-sterile-filtered\/\">Human AB Serum, Mixed Donors \u2013 heat inactivated<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/human-serum-type-ab-male-off-the-clot-xeno-free-eu-origin\/\">Male AB Serum Off-the-Clot \u2013 xeno-free, EU origin<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/human-serum-off-the-clot-eu-us-origin-sterile-filtered\/\">Human Serum Off-the-Clot \u2013 EU\/US origin<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/human-serum-heat-inactivated-mixed-donors-eu-us-origin-sterile-filtered\/\">Heat-Inactivated Human Serum \u2013 mixed donors<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/human-serum-delipidated\/\">Delipidated Human Serum \u2013 EU donors<\/a><\/li>\n<\/ul>\n<\/div>\n\n\n  <!-- QUICK SELECTION -->\n  <div class=\"sb-hs-qs\">\n    <!-- FACTS --><div class=\"sb-hs-facts\" style=\"background:#f1faf9;border-left:4px solid #18b7b2;border-radius:10px;padding:18px 22px;margin:28px 0;line-height:1.65\"><strong>Key facts:<\/strong> SeamlessBio supplies human serum from certified donor centres in the EU and the USA. The range covers mixed-donor serum, Type AB serum, off-the-clot (OTC) serum and male-only serum, each available heat-inactivated or gamma-irradiated on request. Every lot ships with CoA, certificate of origin and donor screening results (HIV-1\/2, HBV, HCV, syphilis). Lots can be reserved for up to 36 months without prepayment, and there is no minimum order \u2013 evaluation volumes start at 100 mL.<\/div><h2>Quick selection \u2014 find the right human serum grade<\/h2>\n    <div class=\"sb-hs-qs-grid\">\n      <a class=\"sb-hs-qs-card\" href=\"https:\/\/seamlessbio.de\/human-serum-otc\/\">\n        <div class=\"sb-hs-qs-label\">Maximum growth factors, natural clotting process<\/div>\n        <div class=\"sb-hs-qs-link\">Human Serum OTC (Mixed) \u2192<\/div>\n      <\/a>\n      <a class=\"sb-hs-qs-card\" href=\"https:\/\/seamlessbio.de\/human-serum-type-ab\/\">\n        <div class=\"sb-hs-qs-label\">No anti-A\/B antibodies, immunoassay matrix<\/div>\n        <div class=\"sb-hs-qs-link\">Human Serum Type AB \u2192<\/div>\n      <\/a>\n      <a class=\"sb-hs-qs-card\" href=\"https:\/\/seamlessbio.de\/human-serum-otc-type-ab-male\/\">\n        <div class=\"sb-hs-qs-label\">CAR-T, NK cell expansion, ATMP manufacturing<\/div>\n        <div class=\"sb-hs-qs-link\">Human Serum OTC Type AB Male \u2192<\/div>\n      <\/a>\n      <a class=\"sb-hs-qs-card\" href=\"https:\/\/seamlessbio.de\/human-serum-male\/\">\n        <div class=\"sb-hs-qs-label\">Reduced hormonal variability, male donors only<\/div>\n        <div class=\"sb-hs-qs-link\">Human Serum Male \u2192<\/div>\n      <\/a>\n      <a class=\"sb-hs-qs-card\" href=\"https:\/\/seamlessbio.de\/human-serum-delipidated\/\">\n        <div class=\"sb-hs-qs-label\">Lipemia interference, IVD assay matrix<\/div>\n        <div class=\"sb-hs-qs-link\">Human Serum Delipidated \u2192<\/div>\n      <\/a>\n      <a class=\"sb-hs-qs-card\" href=\"https:\/\/seamlessbio.de\/human-plasma-apheresis-plasma\/\">\n        <div class=\"sb-hs-qs-label\">IVD calibrators, coagulation, bulk supply<\/div>\n        <div class=\"sb-hs-qs-link\">Human Plasma &amp; Apheresis \u2192<\/div>\n      <\/a>\n    <\/div>\n  <\/div>\n\n  <!-- USP CARDS -->\n  <div class=\"sb-hs-usps\">\n    <div class=\"sb-hs-usp\">\n      <div class=\"sb-hs-usp-num\">01<\/div>\n      <h3>Cost-Effective<\/h3>\n      <p>The most economical human serum grade \u2014 suited to general culture and assay work without strict donor-type requirements.<\/p>\n    <\/div>\n    <div class=\"sb-hs-usp\">\n      <div class=\"sb-hs-usp-num\">02<\/div>\n      <h3>EU &amp; US Origin<\/h3>\n      <p>Collected at certified donor centres in the EU and USA \u2014 fully documented and traceable per batch. CoA, CoO and MSDS included.<\/p>\n    <\/div>\n    <div class=\"sb-hs-usp\">\n      <div class=\"sb-hs-usp-num\">03<\/div>\n      <h3>HI or GI on Request<\/h3>\n      <p>Heat Inactivated (56\u00b0C, 30 min) or Gamma Irradiated available for complement-sensitive or higher biosafety applications.<\/p>\n    <\/div>\n    <div class=\"sb-hs-usp\">\n      <div class=\"sb-hs-usp-num\">04<\/div>\n      <h3>No Minimum Order<\/h3>\n      <p>From 100 mL evaluation volumes to bulk litres \u2014 batch reservation available, no prepayment required.<\/p>\n    <\/div>\n  <\/div>\n\n  <!-- 2-COL TEXT -->\n  <div class=\"sb-hs-twocol\">\n    <div>\n      <h2>The flexible entry point into human serum<\/h2>\n      <p>Human Serum (Mixed Donors) is the standard starting point when blood-type neutrality, off-the-clot processing, or donor-gender consistency are not required by the protocol. Collected from a broad pooled donor population at certified EU and US donation centres, this grade delivers the core physiological composition of human serum \u2014 growth factors, transport proteins, hormones, immunoglobulins and trace elements \u2014 at the most accessible price point in our range.<\/p>\n      <p>Unlike fetal bovine serum (FBS), human serum is species-matched to human cells. This eliminates the risk of xenogenic immune reactions and provides a physiological environment closer to in vivo conditions \u2014 particularly relevant for primary human cell lines, immune cell cultures, and any application where regulatory bodies are moving away from animal-derived components.<\/p>\n      <p>For applications that specifically require the absence of anti-A and anti-B antibodies, a defined hormonal background, or maximum growth factor content from off-the-clot collection, our <a href=\"https:\/\/seamlessbio.de\/human-serum-type-ab\/\">Human Serum Type AB<\/a>, <a href=\"https:\/\/seamlessbio.de\/human-serum-male\/\">Human Serum Male<\/a> and <a href=\"https:\/\/seamlessbio.de\/human-serum-otc\/\">Human Serum OTC<\/a> grades offer tighter specification. For a full comparison see our <a href=\"https:\/\/seamlessbio.de\/fbs-vs-human-serum\/\">FBS vs. Human Serum guide<\/a>.<\/p>\n    <\/div>\n    <div>\n      <h3>Typical applications<\/h3>\n      <ul class=\"sb-hs-bullets\">\n        <li>General human cell culture \u2014 primary cells, established lines (HeLa, HEK293, Jurkat)<\/li>\n        <li>Diagnostic assay development without strict matrix requirements<\/li>\n        <li>Teaching and training laboratories \u2014 cost-sensitive protocols<\/li>\n        <li>Method development and initial screening before switching to tighter-spec serum<\/li>\n        <li>Hybridoma culture and antibody production (mixed donor, non-AB)<\/li>\n        <li>Virology research \u2014 human cell line maintenance<\/li>\n        <li>Toxicology and cytotoxicity assays using human cell matrices<\/li>\n        <li>Pilot-scale process development before committing to a premium grade<\/li>\n      <\/ul>\n    <\/div>\n  <\/div>\n\n  <!-- COMPARE TABLE -->\n  <div class=\"sb-hs-compare-wrap\">\n    <h2>Human Serum Standard vs. other grades \u2014 when to upgrade<\/h2>\n    <table class=\"sb-hs-compare\">\n      <thead>\n        <tr>\n          <th>Grade<\/th>\n          <th>Processing<\/th>\n          <th>Blood Type<\/th>\n          <th>Donor Gender<\/th>\n          <th>Best For<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr class=\"sb-hs-highlight-row\">\n          <td>Human Serum Standard <em>(this product)<\/em><\/td>\n          <td>Clotted (converted)<\/td>\n          <td>Mixed<\/td>\n          <td>Mixed<\/td>\n          <td>General culture, cost-sensitive assay work, screening<\/td>\n        <\/tr>\n        <tr>\n          <td><a href=\"https:\/\/seamlessbio.de\/human-serum-otc\/\">Human Serum OTC<\/a><\/td>\n          <td>Off-the-clot<\/td>\n          <td>Mixed<\/td>\n          <td>Mixed<\/td>\n          <td>Applications needing higher growth factor content<\/td>\n        <\/tr>\n        <tr>\n          <td><a href=\"https:\/\/seamlessbio.de\/human-serum-male\/\">Human Serum Male<\/a><\/td>\n          <td>Clotted<\/td>\n          <td>Mixed<\/td>\n          <td>Male only<\/td>\n          <td>Hormone-sensitive assays, reduced cycle variability<\/td>\n        <\/tr>\n        <tr>\n          <td><a href=\"https:\/\/seamlessbio.de\/human-serum-type-ab\/\">Human Serum Type AB<\/a><\/td>\n          <td>Clotted<\/td>\n          <td>AB only<\/td>\n          <td>Mixed<\/td>\n          <td>No anti-A\/B antibodies \u2014 immunoassays, cell culture<\/td>\n        <\/tr>\n        <tr>\n          <td><a href=\"https:\/\/seamlessbio.de\/human-serum-otc-type-ab-male\/\">Human Serum OTC Type AB Male<\/a><\/td>\n          <td>Off-the-clot<\/td>\n          <td>AB only<\/td>\n          <td>Male only<\/td>\n          <td>CAR-T, NK cell, ATMP \u2014 maximum specification<\/td>\n        <\/tr>\n        <tr>\n          <td><a href=\"https:\/\/seamlessbio.de\/human-serum-delipidated\/\">Human Serum Delipidated<\/a><\/td>\n          <td>Delipidated<\/td>\n          <td>Mixed<\/td>\n          <td>Mixed<\/td>\n          <td>Lipemia interference studies, lipid-free assay matrix<\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <!-- PRODUCT INFO -->\n  <div class=\"sb-hs-info\">\n    <div class=\"sb-hs-info-card\">\n      <h3>Product information<\/h3>\n      <ul>\n        <li>Product type: Human Serum, Clotted (Converted)<\/li>\n        <li>Blood type: Mixed pool \u2014 no blood type restriction<\/li>\n        <li>Donor gender: Mixed \u2014 male and female donors<\/li>\n        <li>Origin: EU and\/or US \u2014 certified donor centres<\/li>\n        <li>Sterile filtration: 0.2 \u00b5m<\/li>\n        <li>Viral screening: HIV-1\/2, HBsAg, HCV, Syphilis \u2014 negative<\/li>\n        <li>Volumes: 100 mL \u00b7 500 mL \u00b7 bulk on request<\/li>\n        <li>Packaging: Bottle standard \u00b7 bag on request<\/li>\n        <li>Storage: \u221220\u00b0C<\/li>\n        <li>Documentation: CoA, CoO, MSDS \u2014 included<\/li>\n        <li>Minimum order: No minimum order quantity<\/li>\n      <\/ul>\n    <\/div>\n    <div class=\"sb-hs-info-card\">\n      <h3>Available on request<\/h3>\n      <ul>\n        <li>Heat Inactivated (HI) \u2014 56\u00b0C, 30 min, complement depleted<\/li>\n        <li>Gamma Irradiated (GI) \u2014 pathogen inactivation<\/li>\n        <li>Low Endotoxin specification<\/li>\n        <li>Donor age specification (e.g. 18\u201340 years)<\/li>\n        <li>Bag packaging for large volumes<\/li>\n        <li>ATMP-relevant documentation (Ph. Eur. 5.2.12)<\/li>\n        <li>Batch reservation \u2014 no prepayment, up to 36 months<\/li>\n        <li>Bulk quantities \u22651 L \u2014 quote on request<\/li>\n      <\/ul>\n    <\/div>\n  <\/div>\n\n  <!-- FAQ -->\n  <div class=\"sb-hs-faq\">\n    <!-- SB-CH-BOX --><div style=\"border:1px solid #e6e6e6;border-left:4px solid #d52b1e;background:#fafafa;border-radius:0 10px 10px 0;padding:14px 18px;margin:22px 0;font-size:15px;line-height:1.6\"><strong>Ordering from Switzerland?<\/strong> <a href=\"https:\/\/seamlessbio.ch\/humanserum\/\" style=\"color:#d52b1e;font-weight:700\">Order human serum from Swiss stock \u2192<\/a><br><span style=\"font-size:14px;color:#5b6b71\">Invoiced in CHF with Swiss VAT by Seamless Bio GmbH \u00b7 no import customs clearance<\/span><\/div>\n<h2>Frequently asked questions<\/h2>\n\n    <div class=\"sb-hs-faq-item\">\n      <h3>What is the difference between clotted (converted) serum and off-the-clot serum?<\/h3>\n      <p>Clotted (converted) serum is produced from pooled donor plasma by adding calcium chloride or thrombin to induce clotting. The clot is removed by centrifugation, leaving the serum. Off-the-clot (OTC) serum is produced from whole blood allowed to clot naturally without anticoagulants \u2014 during natural clotting, platelets degranulate and release additional growth factors (PDGF, TGF-\u03b2, EGF) into the serum. OTC serum therefore typically contains higher and more diverse growth factor concentrations. For general cell culture where maximum growth factor content is not critical, converted serum performs equivalently at lower cost. See <a href=\"https:\/\/seamlessbio.de\/human-serum-otc\/\">Human Serum OTC<\/a> for the off-the-clot equivalent.<\/p>\n    <\/div>\n\n    <div class=\"sb-hs-faq-item\">\n      <h3>Why use human serum instead of FBS for human cell culture?<\/h3>\n      <p>Fetal bovine serum contains bovine-specific growth factors, hormones and proteins that can trigger xenogenic immune responses in human cells \u2014 an effect that does not occur with human serum. Human serum also more closely replicates the in vivo biochemical environment for human cell lines, which can improve reproducibility in physiologically relevant experiments. Regulatory agencies and cell therapy guidelines are increasingly requesting justification for any animal-derived component; human serum removes this hurdle. For a full comparison see our <a href=\"https:\/\/seamlessbio.de\/fbs-vs-human-serum\/\">FBS vs. Human Serum guide<\/a>.<\/p>\n    <\/div>\n\n    <div class=\"sb-hs-faq-item\">\n      <h3>When should I choose Human Serum Standard vs. Type AB?<\/h3>\n      <p>Human Serum Standard (mixed donors) contains anti-A and anti-B alloantibodies from non-AB donors in the pool. For most general cell culture applications this is not a problem. However, if you are working with immune cells (T cells, NK cells, macrophages), conducting immunological assays, or running applications where blood-group-specific antibody reactivity could interfere, <a href=\"https:\/\/seamlessbio.de\/human-serum-type-ab\/\">Human Serum Type AB<\/a> \u2014 which lacks anti-A and anti-B antibodies entirely \u2014 is the correct choice. If unsure, contact us and we can advise based on your specific protocol.<\/p>\n    <\/div>\n\n    <div class=\"sb-hs-faq-item\">\n      <h3>Is Heat Inactivated human serum available?<\/h3>\n      <p>Yes. Heat Inactivated (HI) human serum \u2014 treated at 56\u00b0C for 30 minutes to inactivate complement proteins \u2014 is available on request for this grade. HI serum is preferred for complement-sensitive applications including hybridoma culture, mixed lymphocyte reactions, and immunological assays where complement-mediated cell lysis would confound results. Specify HI at time of order.<\/p>\n    <\/div>\n\n    <div class=\"sb-hs-faq-item\">\n      <h3>How do I adapt cells from FBS to human serum?<\/h3>\n      <p>A stepwise adaptation is recommended to avoid culture shock. Start by supplementing your medium with 5% FBS + 5% human serum for 4\u20136 days. Then reduce to 2% FBS + 8% human serum for a further passage. Finally switch to 100% human serum at the standard working concentration (typically 5\u201310%). Optimal concentration should be validated per cell line. Free test volumes are available on request \u2014 contact <a href=\"mailto:info@seamlessbio.de\">info@seamlessbio.de<\/a>.<\/p>\n    <\/div>\n\n    <div class=\"sb-hs-faq-item\">\n      <h3>What documentation is included with every lot?<\/h3>\n      <p>Every lot ships with a Certificate of Analysis (CoA), Certificate of Origin (CoO) and Material Safety Data Sheet (MSDS). The CoA includes viral screening results (HIV-1\/2, HBsAg, HCV, Syphilis \u2014 all negative), sterility confirmation, and key physicochemical parameters. Additional documentation \u2014 ATMP-relevant statements per Ph. Eur. 5.2.12, donor demographic summaries \u2014 is available on request.<\/p>\n    <\/div>\n  <div class=\"sb-hs-faq-item\"><h3>Where can I buy human serum in Europe?<\/h3><p>SeamlessBio ships human serum from EU stock to Germany, Austria, Switzerland and the rest of the EU \u2013 with no minimum order, CoA and certificate of origin. Swiss customers order via Seamless Bio GmbH with invoicing in CHF.<\/p><\/div>\n<div class=\"sb-hs-faq-item\"><h3>How long can a human serum lot be reserved?<\/h3><p>Up to 36 months, without prepayment. Test a sample first, then we store your reserved lot and ship partial quantities as you need them.<\/p><\/div>\n<div class=\"sb-hs-faq-item\"><h3>Which human serum is right for my application?<\/h3><p>Mixed donors for general cell culture and assay development; <a href=\"https:\/\/seamlessbio.de\/human-serum-type-ab\/\">Type AB<\/a> for immunoassays, PBMC and ELISpot; <a href=\"https:\/\/seamlessbio.de\/human-serum-otc\/\">off-the-clot<\/a> when you need the full growth factor profile; male-only donors for hormone-sensitive assays. For coagulation work, use <a href=\"https:\/\/seamlessbio.de\/human-plasma-apheresis-plasma\/\">human plasma<\/a>.<\/p><\/div>\n<div class=\"sb-hs-faq-item\"><h3>Is human serum better than FBS for human cells?<\/h3><p>For primary human cells, immune cells and ATMP work, usually yes: it is species-matched and free of xenogeneic proteins. For established cell lines, FBS often remains sufficient. See our comparison <a href=\"https:\/\/seamlessbio.de\/fbs-vs-human-serum\/\">FBS vs. human serum<\/a>.<\/p><\/div><div class=\"sb-hs-faq-item\"><h3>How much does human serum cost?<\/h3><p>Human serum is priced per lot and volume. The main cost drivers are the donor type (mixed, male-only or type AB), the collection method (off-the-clot or plasma-derived), heat inactivation, testing and documentation, and the volume you reserve. We quote per lot with no minimum order; reserving a lot for up to 36 months keeps your conditions stable. <a href=\"https:\/\/seamlessbio.de\/request-quote\/\">Send us your grade and volume for a quote<\/a>.<\/p><\/div><div class=\"sb-hs-faq-item\"><h3>Where can I buy human serum for research?<\/h3><p>SeamlessBio supplies mixed, male-only and type AB human serum from EU and US donors \u2013 off-the-clot or plasma-derived, heat-inactivated on request \u2013 shipped from EU stock with CoA and a free test sample.<\/p><\/div><\/div>\n\n  <!-- RELATED PRODUCTS -->\n  <div class=\"sb-hs-related-title\">Related human serum products<\/div>\n  <div class=\"sb-hs-related\">\n    <a class=\"sb-hs-related-card\" href=\"https:\/\/seamlessbio.de\/human-serum-otc\/\">\n      <strong>Human Serum OTC (Mixed)<\/strong>\n      <span>Off-the-clot \u2014 higher growth factor content for demanding cell culture protocols.<\/span>\n    <\/a>\n    <a class=\"sb-hs-related-card\" href=\"https:\/\/seamlessbio.de\/human-serum-type-ab\/\">\n      <strong>Human Serum Type AB<\/strong>\n      <span>No anti-A\/B antibodies \u2014 for immunoassays and applications requiring blood-group neutrality.<\/span>\n    <\/a>\n    <a class=\"sb-hs-related-card\" href=\"https:\/\/seamlessbio.de\/human-serum-otc-type-ab-male\/\">\n      <strong>Human Serum OTC Type AB Male<\/strong>\n      <span>Maximum specification \u2014 CAR-T, NK cell expansion and ATMP manufacturing.<\/span>\n    <\/a>\n    <a class=\"sb-hs-related-card\" href=\"https:\/\/seamlessbio.de\/human-sera-plasma-and-more\/\">\n      <strong>All Human Serum Products<\/strong>\n      <span>Full Human Sera &amp; Plasma overview \u2014 all grades and formats.<\/span>\n    <\/a>\n  <\/div>\n\n  <!-- CTA -->\n  <div class=\"sb-hs-cta\">\n    <h2>Need a test volume for your protocol?<\/h2>\n    <p>Contact our team for batch availability, documentation and a free test volume of Human Serum \u2014 no minimum order, no prepayment required.<\/p>\n    <a class=\"sb-hs-btn-teal\" href=\"https:\/\/seamlessbio.de\/contact\/\">Contact Us<\/a>\n  <\/div>\n\n<\/div>\n<script type=\"application\/ld+json\" id=\"sb-hs-faq-ld\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How much does human serum cost?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Human serum is priced per lot and volume. The main cost drivers are the donor type (mixed, male-only or type AB), the collection method (off-the-clot or plasma-derived), heat inactivation, testing and documentation, and the volume you reserve. We quote per lot with no minimum order; reserving a lot for up to 36 months keeps your conditions stable. Send us your grade and volume for a quote.\"}},{\"@type\":\"Question\",\"name\":\"Where can I buy human serum for research?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"SeamlessBio supplies mixed, male-only and type AB human serum from EU and US donors \u2013 off-the-clot or plasma-derived, heat-inactivated on request \u2013 shipped from EU stock with CoA and a free test sample.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between clotted (converted) serum and off-the-clot serum?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Clotted (converted) serum is produced from pooled donor plasma by adding calcium chloride or thrombin to induce clotting. The clot is removed by centrifugation, leaving the serum. Off-the-clot (OTC) serum is produced from whole blood allowed to clot naturally without anticoagulants \u2014 during natural clotting, platelets degranulate and release additional growth factors (PDGF, TGF-\u03b2, EGF) into the serum. OTC serum therefore typically contains higher and more diverse growth factor concentrations. For general cell culture where maximum growth factor content is not critical, converted serum performs equivalently at lower cost. See Human Serum OTC for the off-the-clot equivalent.\"}},{\"@type\":\"Question\",\"name\":\"Why use human serum instead of FBS for human cell culture?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Fetal bovine serum contains bovine-specific growth factors, hormones and proteins that can trigger xenogenic immune responses in human cells \u2014 an effect that does not occur with human serum. 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However, if you are working with immune cells (T cells, NK cells, macrophages), conducting immunological assays, or running applications where blood-group-specific antibody reactivity could interfere, Human Serum Type AB \u2014 which lacks anti-A and anti-B antibodies entirely \u2014 is the correct choice. If unsure, contact us and we can advise based on your specific protocol.\"}},{\"@type\":\"Question\",\"name\":\"Is Heat Inactivated human serum available?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Heat Inactivated (HI) human serum \u2014 treated at 56\u00b0C for 30 minutes to inactivate complement proteins \u2014 is available on request for this grade. HI serum is preferred for complement-sensitive applications including hybridoma culture, mixed lymphocyte reactions, and immunological assays where complement-mediated cell lysis would confound results. Specify HI at time of order.\"}},{\"@type\":\"Question\",\"name\":\"How do I adapt cells from FBS to human serum?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A stepwise adaptation is recommended to avoid culture shock. Start by supplementing your medium with 5% FBS + 5% human serum for 4\u20136 days. Then reduce to 2% FBS + 8% human serum for a further passage. Finally switch to 100% human serum at the standard working concentration (typically 5\u201310%). Optimal concentration should be validated per cell line. Free test volumes are available on request \u2014 contact info@seamlessbio.de.\"}},{\"@type\":\"Question\",\"name\":\"What documentation is included with every lot?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Every lot ships with a Certificate of Analysis (CoA), Certificate of Origin (CoO) and Material Safety Data Sheet (MSDS). The CoA includes viral screening results (HIV-1\/2, HBsAg, HCV, Syphilis \u2014 all negative), sterility confirmation, and key physicochemical parameters. Additional documentation \u2014 ATMP-relevant statements per Ph. Eur. 5.2.12, donor demographic summaries \u2014 is available on request.\"}},{\"@type\":\"Question\",\"name\":\"Where can I buy human serum in Europe?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"SeamlessBio ships human serum from EU stock to Germany, Austria, Switzerland and the rest of the EU \u2013 with no minimum order, CoA and certificate of origin. Swiss customers order via Seamless Bio GmbH with invoicing in CHF.\"}},{\"@type\":\"Question\",\"name\":\"How long can a human serum lot be reserved?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Up to 36 months, without prepayment. Test a sample first, then we store your reserved lot and ship partial quantities as you need them.\"}},{\"@type\":\"Question\",\"name\":\"Which human serum is right for my application?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Mixed donors for general cell culture and assay development; Type AB for immunoassays, PBMC and ELISpot; off-the-clot when you need the full growth factor profile; male-only donors for hormone-sensitive assays. For coagulation work, use human plasma.\"}},{\"@type\":\"Question\",\"name\":\"Is human serum better than FBS for human cells?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For primary human cells, immune cells and ATMP work, usually yes: it is species-matched and free of xenogeneic proteins. For established cell lines, FBS often remains sufficient. See our comparison FBS vs. human serum.\"}}]}<\/script>\t\t\t\t<\/div>\n\t\t\n<\/div>\n\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Home \/ Human Sera &amp; Plasma \/ Human Serum Standard SeamlessBio \u2014 Human Sera &amp; Plasma Human Serum Mixed donors, Type AB, off-the-clot and male-only \u2013 human serum from certified EU and US donor centres. This page covers the mixed-donor grade; every other grade is one click away in the quick selection below. Heat inactivated [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","footnotes":""},"class_list":["post-25","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Human Serum for Research &amp; Cell Culture \u2013 EU Supplier<\/title>\n<meta name=\"description\" content=\"Buy human serum for research and cell culture: type AB, off-the-clot, male-only and mixed donors from EU &amp; US, heat-inactivated on request. Full CoA, free sample.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/seamlessbio.de\/de\/humanserum\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Human Serum for Research &amp; Cell Culture \u2013 EU Supplier\" \/>\n<meta property=\"og:description\" content=\"Buy human serum for research and cell culture: type AB, off-the-clot, male-only and mixed donors from EU &amp; US, heat-inactivated on request. 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