{"id":126745,"date":"2026-07-01T20:56:07","date_gmt":"2026-07-02T02:56:07","guid":{"rendered":"https:\/\/purmabiologics.com\/blog\/?p=126745"},"modified":"2026-10-07T13:01:28","modified_gmt":"2026-10-07T19:01:28","slug":"cell-culture-serum","status":"publish","type":"post","link":"https:\/\/purmabiologics.com\/blog\/cell-culture-serum\/","title":{"rendered":"Cell Culture Serum: Types, Uses, and How to Choose"},"content":{"rendered":"<p>Cell culture serum is one of the most important supplements in mammalian cell culture. Added to basal media, it supplies the growth factors, hormones, attachment factors, and transport proteins that cells need to survive, grow, and divide. But &#8220;serum&#8221; isn&#8217;t one single product \u2014 there are several types and specialized treatments, and choosing the right one has a real effect on how your cells behave. This guide breaks down the main types of cell culture serum and how to pick the one that fits your work.<\/p>\n<div class=\"purma-quick-answer\"><span class=\"qa-label\">Quick Answer<\/span><\/p>\n<p>Standard FBS is the default supplement for most cell culture work. Reach for a treated variant, dialyzed, charcoal-stripped, or lipid-depleted, only when a specific serum component would interfere with your assay.<\/p>\n<\/div>\n<div class=\"purma-product-pair\">\n<figure><img decoding=\"async\" src=\"https:\/\/purmabiologics.com\/blog\/wp-content\/uploads\/2023\/07\/Premium-FBS_W500_08242024.png\" alt=\"PurMa Fetal Bovine Serum bottle\" loading=\"lazy\"><figcaption>FBS<\/figcaption><\/figure>\n<\/div>\n<h2>What Does Serum Do in Cell Culture?<\/h2>\n<p>Serum is the liquid fraction of blood left after clotting. In culture, it provides a rich mix of components that basal media alone can&#8217;t:<\/p>\n<ul>\n<li><strong>Growth factors and hormones<\/strong>\u00a0that drive cell proliferation<\/li>\n<li><strong>Attachment and spreading factors<\/strong>\u00a0that help adherent cells anchor to surfaces<\/li>\n<li><strong>Transport proteins<\/strong>\u00a0(like albumin and transferrin) that carry hormones, lipids, and iron<\/li>\n<li><strong>Protease inhibitors, lipids, and trace minerals<\/strong>\u00a0that support cell health<\/li>\n<\/ul>\n<p>Because serum is biological, its exact composition varies from batch to batch \u2014 which is why the\u00a0<em>type<\/em>\u00a0and\u00a0<em>quality<\/em>\u00a0you choose matters.<\/p>\n<h2>The Main Types of Cell Culture Serum<\/h2>\n<p><strong>Fetal Bovine Serum (FBS)<\/strong>\u00a0is the gold standard. Collected from bovine fetuses, it&#8217;s the richest in growth factors and lowest in antibodies, making it excellent for promoting rapid growth across the widest range of cell lines. It&#8217;s the default choice for most labs. Explore<a href=\"\/product\/premium-fetal-bovine-serum-p-fbs\/\">\u00a0Fetal Bovine Serum (FBS).<\/a><\/p>\n<p><strong>Bovine Calf Serum (BCS)<\/strong>\u00a0comes from young cattle and is more economical than FBS. It contains fewer growth factors, so it suits established, less demanding cell lines where the full richness of FBS isn&#8217;t required \u2014 a cost-effective option for routine, large-scale culture. Explore\u00a0<a href=\"\/product\/bovine-calf-serum-bcs\/\">Bovine Calf Serum (BCS).<\/a><\/p>\n<p><strong>Horse Serum<\/strong>\u00a0is collected from adult or donor horses. It offers more batch-to-batch consistency than FBS and is the preferred serum for specific applications like muscle cell differentiation, certain neuronal cultures, and some immunology work. For a full comparison, see our guide on\u00a0<a href=\"\/horse-serum-vs-fbs\/\">Horse Serum vs FBS<\/a>. Explore\u00a0<a href=\"\/product\/horse-serum-hs\/\">Horse Serum.<\/a><\/p>\n<h2>Specialty (Treated) Serums<\/h2>\n<p>When a study demands a more defined environment, serum can be treated to remove specific components:<\/p>\n<p><strong>Charcoal-Stripped Serum<\/strong>\u00a0is treated with activated charcoal to remove hormones, steroids, and other lipophilic substances \u2014 the go-to for hormone- and steroid-response research such as estrogen receptor studies. Explore\u00a0<a href=\"\/product\/charcoal-stripped-fetal-bovine-serum\/\">Charcoal-Stripped FBS.<\/a><\/p>\n<p><strong>Dialyzed Serum<\/strong>\u00a0is passed through a dialysis membrane to remove small molecules \u2014 amino acids, glucose, hormones, and salts \u2014 while keeping the large proteins and growth factors. It&#8217;s used when you need a defined low-molecular-weight background, such as metabolic or amino acid studies. Explore\u00a0<a href=\"\/product\/dialyzed-fetal-bovine-serum-d-fbs\/\">Dialyzed FBS<\/a> or <a href=\"\/product\/dialyzed-fetal-horse-serum-dfhs\/\">Dialyzed Horse Serum<\/a>.<\/p>\n<p><strong>Lipid-Depleted Serum<\/strong>\u00a0has its lipids and lipoproteins removed, making it ideal for lipid metabolism and cholesterol studies where background lipids would interfere. Explore\u00a0<a href=\"\/product\/lipid-depleted-fetal-bovine-serum-ld-fbs\/\">Lipid-Depleted FBS.<\/a><\/p>\n<h2>How to Choose the Right Cell Culture Serum<\/h2>\n<div class=\"overflow-x-auto\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Your situation<\/th>\n<th scope=\"col\">Best serum<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>General growth, most cell lines<\/td>\n<td>Fetal Bovine Serum (FBS)<\/td>\n<\/tr>\n<tr>\n<td>Cost-sensitive, established lines<\/td>\n<td>Bovine Calf Serum<\/td>\n<\/tr>\n<tr>\n<td>Muscle differentiation, specific cell types<\/td>\n<td>Horse Serum<\/td>\n<\/tr>\n<tr>\n<td>Studying hormones or steroids<\/td>\n<td>Charcoal-Stripped Serum<\/td>\n<\/tr>\n<tr>\n<td>Need a defined, low-molecular-weight background<\/td>\n<td>Dialyzed Serum<\/td>\n<\/tr>\n<tr>\n<td>Studying lipids or cholesterol<\/td>\n<td>Lipid-Depleted Serum<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Beyond type, also consider\u00a0<strong>origin and traceability<\/strong>\u00a0(e.g., USA-sourced),\u00a0<a href=\"https:\/\/purmabiologics.com\/blog\/heat-inactivate-fbs\/\"><strong>heat inactivation<\/strong><\/a>\u00a0(to destroy complement),\u00a0<strong>gamma irradiation<\/strong>\u00a0(for viral safety), and\u00a0<strong>endotoxin levels<\/strong>, all of which affect performance and reproducibility.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<p><strong>What is serum used for in cell culture?<\/strong><br \/>\nSerum supplements basal media with the growth factors, hormones, attachment factors, and transport proteins that cells need to grow and stay healthy.<\/p>\n<p><strong>What is the most common cell culture serum?<\/strong><br \/>\nFetal Bovine Serum (FBS) is the most widely used, because it&#8217;s rich in growth factors and supports the broadest range of cell lines.<\/p>\n<p><strong>What&#8217;s the difference between dialyzed and charcoal-stripped serum?<\/strong><br \/>\nDialyzed serum has small molecules (like amino acids and salts) removed; charcoal-stripped serum has hormones and steroids removed. You choose based on what your experiment needs to control.<\/p>\n<h2>Choosing With Confidence<\/h2>\n<p>The right cell culture serum depends on your cell type and your experiment. For most work, FBS is the safe default; for specialized studies, a treated serum gives you the defined conditions you need. PurMa Biologics supplies research-grade serums across every category \u2014 FBS, bovine calf, horse, and treated serums \u2014 for reliable, reproducible results.<\/p>\n<p>Looking at a lower-cost option? See our guide on <a href=\"\/what-is-bovine-calf-serum\/\">what bovine calf serum is and when to use it<\/a>.<\/p>\n<p>Running hormone-sensitive models? See our guide on <a href=\"\/charcoal-stripped-fbs-organ-on-chip\/\">using charcoal stripped FBS in organ-on-a-chip development<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cell culture serum is one of the most important supplements in mammalian cell culture. Added to basal media, it supplies the growth factors, hormones, attachment factors, and transport proteins that cells need to survive, grow, and divide. But &#8220;serum&#8221; isn&#8217;t one single product \u2014 there are several types and specialized treatments, and choosing the right [&hellip;]<\/p>\n","protected":false},"author":3155,"featured_media":126746,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[856],"tags":[],"class_list":["post-126745","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","entry","has-media","owp-thumbs-layout-horizontal","owp-btn-normal","owp-tabs-layout-horizontal","has-no-thumbnails","has-product-nav"],"acf":[],"_links":{"self":[{"href":"https:\/\/purmabiologics.com\/blog\/wp-json\/wp\/v2\/posts\/126745","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/purmabiologics.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/purmabiologics.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/purmabiologics.com\/blog\/wp-json\/wp\/v2\/users\/3155"}],"replies":[{"embeddable":true,"href":"https:\/\/purmabiologics.com\/blog\/wp-json\/wp\/v2\/comments?post=126745"}],"version-history":[{"count":1,"href":"https:\/\/purmabiologics.com\/blog\/wp-json\/wp\/v2\/posts\/126745\/revisions"}],"predecessor-version":[{"id":128192,"href":"https:\/\/purmabiologics.com\/blog\/wp-json\/wp\/v2\/posts\/126745\/revisions\/128192"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/purmabiologics.com\/blog\/wp-json\/wp\/v2\/media\/126746"}],"wp:attachment":[{"href":"https:\/\/purmabiologics.com\/blog\/wp-json\/wp\/v2\/media?parent=126745"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/purmabiologics.com\/blog\/wp-json\/wp\/v2\/categories?post=126745"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/purmabiologics.com\/blog\/wp-json\/wp\/v2\/tags?post=126745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}