{"id":71497,"date":"2026-05-20T10:20:00","date_gmt":"2026-05-20T10:20:00","guid":{"rendered":"https:\/\/medsbase.com\/thymalin\/"},"modified":"2026-05-21T07:14:09","modified_gmt":"2026-05-21T07:14:09","slug":"thymalin","status":"publish","type":"product","link":"https:\/\/medsbase.com\/nl\/thymalin\/","title":{"rendered":"Thymalin (Khavinson Thymic Polypeptide Bioregulator)"},"content":{"rendered":"<p><!-- medsbase-tldr-answer --><\/p>\n<div style=\"background: #fff8e1; border-left: 4px solid #f5a623; padding: 18px 22px; margin: 18px 0; border-radius: 4px;\">\n<h3 style=\"margin: 0 0 8px 0; font-size: 16px; color: #1a4a6b;\">Quick Answer \u2014 What is Thymalin?<\/h3>\n<p style=\"margin: 0;\"><strong>Thymalin<\/strong> is a polypeptide preparation extracted from calf or porcine thymus tissue, developed by <strong>Khavinson<\/strong> and colleagues at the St. Petersburg Institute of Bioregulation and Gerontology beginning in the 1970s. Unlike single-peptide research compounds, Thymalin is a <strong>multi-component peptide complex<\/strong> (typical MW range 1\u201310 kDa across the mixture) consisting of short oligopeptide bioregulators that originate in thymic stromal cells. The most cited active components are tetrapeptide EW (Glu-Trp) and other Khavinson-class short peptide bioregulators. Thymalin is used in published Russian and Eastern European research as a thymus-axis immune-modulator that promotes T-cell maturation, restores age-related thymic involution markers, and modulates neuroendocrine-immune crosstalk. For laboratory research use only. <em>Polypeptide bioregulator preparation \u2014 not a single-sequence peptide.<\/em><\/p>\n<\/div>\n<div class=\"medsbase-trust-strip\" style=\"background: #f4f8fb; border: 1px solid #d8e3eb; padding: 12px 16px; margin: 16px 0; border-radius: 4px; font-size: 14px;\"><strong>Wat u krijgt bij MedsBase:<\/strong> Lyophilized \u226599% HPLC-verified Thymalin preparation \u00b7 COA available on request \u00b7 Discreet temperature-stable packaging \u00b7 Worldwide research-supply courier \u00b7 1,400+ verified <a href=\"https:\/\/medsbase.com\/nl\/reviews\/\">klantbeoordelingen<\/a><\/div>\n<p class=\"medsbase-reship-line\" style=\"font-size: 14px; color: #444; margin: 8px 0 18px;\">\ud83d\udce6 Elke bestelling is gedekt door onze <a href=\"https:\/\/medsbase.com\/nl\/medsbase-re-shipment-assurance-policy\/\"><strong>Reshipment Assurance Policy<\/strong><\/a> \u2014 als uw pakket niet binnen 20 werkdagen arriveert, sturen wij het opnieuw.<\/p>\n<table class=\"medsbase-spec-table\" style=\"width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14px;\">\n<thead>\n<tr style=\"background: #2c7cb0; color: #fff;\">\n<th style=\"padding: 8px 12px;\">Specificatie<\/th>\n<th style=\"padding: 8px 12px;\">Detail<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Compound Class<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">Polypeptide bioregulator preparation (multi-component thymic peptide mixture); Khavinson-class peptide bioregulator<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Source<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">Tissue-extracted from calf or porcine thymus; purified by acid extraction + chromatographic fractionation<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>CAS-nummer<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">Multi-component preparation \u2014 no single canonical CAS; identification by HPLC fingerprint and bioactivity assay<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0; width: 30%;\"><strong>Molecuulformule<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">Multi-component thymic polypeptide bioregulator (Khavinson preparation) \u2014 heterogeneous low-molecular-weight peptide pool from calf thymus ultrafiltrate, &lt; 10 kDa. No single molecular formula due to multi-peptide composition; activity assigned to the short-peptide fraction.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Active Components<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">Mixture of short oligopeptides (di- through hexapeptides predominantly), MW range ~200\u201310,000 Da. Best-characterised components include thymic dipeptide EW (Glu-Trp) and other Khavinson short-peptide bioregulators.<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Werkingsmechanisme<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">Multi-component thymus-axis immune modulation. Published research attributes effects to: (1) promotion of T-cell precursor maturation in thymic cortex and medulla; (2) restoration of age-related thymic involution markers (improved TREC count, increased thymic-output naive T-cell production); (3) modulation of cytokine balance (IL-2, IFN-\u03b3 upregulation in lymphocyte cultures); (4) crosstalk with hypothalamic-pituitary axis via the Khavinson-peptide bioregulator network.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Form \/ Purity<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">Lyophilized white-to-pale-yellow amorphous powder; \u226599% HPLC purity (multi-component preparation; HPLC profile-fingerprint COA available)<\/td>\n<\/tr>\n<tr style=\"background: #f9f9f9;\">\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Opslag<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">Lyophilized: 2\u20138 \u00b0C short-term, \u221220 \u00b0C long-term. Reconstituted: 2\u20138 \u00b0C, use within 30 days. Avoid freeze-thaw.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\"><strong>Onderzoeksgebruik<\/strong><\/td>\n<td style=\"padding: 8px 12px; border-bottom: 1px solid #e0e0e0;\">For laboratory research use only. Not for human or veterinary diagnostic or therapeutic use. Thymalin has clinical-use approval in Russia and several CIS countries but is not approved by FDA \/ EMA \/ MHRA. Not on the WADA Prohibited List.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><!-- \/medsbase-tldr-answer --><\/p>\n<h2>Mechanism of Action \u2014 Thymic-Axis Bioregulator<\/h2>\n<p>Thymalin is the canonical Khavinson-class <strong>peptide bioregulator<\/strong> derived from thymic tissue. The Khavinson bioregulator concept (developed at the St. Petersburg Institute of Bioregulation and Gerontology from the 1970s) posits that tissue-specific short peptides act as inter-organ signalling molecules that maintain age-appropriate tissue function \u2014 and that age-related decline reflects loss of these peptide bioregulator signals from the source tissue. Thymalin is the original member of this class and is used in published Russian research as the canonical thymus-axis bioregulator.<\/p>\n<p>Mechanism of action across published research:<\/p>\n<ul>\n<li><strong>T-cell precursor maturation<\/strong> \u2014 promotes differentiation of CD4-CD8- thymocyte precursors through CD4+CD8+ double-positive stage and into mature CD4+ or CD8+ T-cell exit populations<\/li>\n<li><strong>Thymic involution reversal<\/strong> \u2014 published rodent and human-subject research reports improvement in age-related thymic-involution markers (increased thymic-output TREC count, improved naive-T-cell ratio)<\/li>\n<li><strong>Cytokine modulation<\/strong> \u2014 published in-vitro lymphocyte culture work reports upregulation of IL-2 and IFN-\u03b3 production<\/li>\n<li><strong>Neuroendocrine-immune crosstalk<\/strong> \u2014 Khavinson-class peptides are proposed to modulate hypothalamic-pituitary-immune integration<\/li>\n<li><strong>Anti-ageing \/ longevity research<\/strong> \u2014 multi-decade Russian-research cohort follow-up has reported reduced age-adjusted mortality in elderly populations receiving repeated Thymalin courses (controversial \u2014 not replicated in Western trials)<\/li>\n<\/ul>\n<h2>Gepubliceerde onderzoeksapplicaties<\/h2>\n<ul>\n<li><strong>Khavinson bioregulator pharmacology<\/strong> \u2014 canonical thymic-axis research compound<\/li>\n<li><strong>Thymic involution research<\/strong> \u2014 age-related T-cell production decline<\/li>\n<li><strong>Immune-system aging research<\/strong> \u2014 naive-T-cell production, TREC count<\/li>\n<li><strong>Cytokine-network modulation<\/strong> \u2014 IL-2, IFN-\u03b3 research<\/li>\n<li><strong>Comparative thymic-peptide research<\/strong> \u2014 compared with <a href=\"https:\/\/medsbase.com\/nl\/epitalon\/\">Epitalon<\/a> (pineal-axis bioregulator) and other Khavinson short peptides<\/li>\n<\/ul>\n<p>For broader context, see <a href=\"https:\/\/medsbase.com\/nl\/epitalon\/\">Epitalon<\/a> (Khavinson pineal tetrapeptide), <a href=\"https:\/\/medsbase.com\/nl\/pinealon\/\">Pinealon<\/a> (Khavinson tripeptide), <a href=\"https:\/\/medsbase.com\/nl\/thymosin-alpha-1\/\">Thymosin Alpha-1<\/a> (single-sequence thymic immune peptide \u2014 direct comparison), and the full <a href=\"https:\/\/medsbase.com\/nl\/peptides\/\">peptide research catalog<\/a>.<\/p>\n<h2>Available Strengths<\/h2>\n<table style=\"width: 100%; border-collapse: collapse; margin: 16px 0;\">\n<thead>\n<tr style=\"background: #2c7cb0; color: #fff;\">\n<th style=\"padding: 10px;\">Vulsterkte<\/th>\n<th style=\"padding: 10px;\">Verpakkingsgroottes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\"><strong>10 mg<\/strong> \u2014 research-protocol standard; mirrors clinical-use vial format from Russian Thymalin preparations<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">10 of 20 flesjes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>How It Compares \u2014 Thymalin vs Thymosin Alpha-1<\/h2>\n<p>Both are thymic-derived immune peptides, but they differ fundamentally in molecular nature. <a href=\"https:\/\/medsbase.com\/nl\/thymosin-alpha-1\/\">Thymosin Alpha-1<\/a> is a defined single-sequence 28-amino-acid peptide (CAS 62304-98-7, MW 3108) with characterised mechanism (PRR-pathway and T-cell-axis modulation). Thymalin is a multi-component polypeptide preparation derived from whole thymic tissue extract \u2014 containing multiple short oligopeptides whose individual identities and proportions vary slightly between batches. Researchers studying defined-mechanism single-peptide pharmacology use Thymosin Alpha-1; those studying broader Khavinson-bioregulator-class thymic-extract effects use Thymalin.<\/p>\n<div style=\"background: #f4f8fb; border-left: 4px solid #2c7cb0; padding: 14px 18px; margin: 18px 0;\"><strong class=\"mb-bac-water-callout\">\ud83d\udca7 Need BAC water?<\/strong> Reconstituting any lyophilized vial requires sterile bacteriostatic water. Pair this product with our <a href=\"\/nl\/bac-water\/\"><strong>BAC Water (Bacteriostatisch Water)<\/strong><\/a> \u2014 30 mL multi-dose vial, 0.9% benzyl-alcohol-preserved, USP-grade.<\/div>\n<h2>Opslag en Reconstituering<\/h2>\n<p>Lyophilized 2\u20138 \u00b0C short-term, \u221220 \u00b0C long-term. Reconstitute in bacteriostatic water (1.0 mL per 10 mg vial \u2192 10 mg\/mL). Swirl gently. Store reconstituted at 2\u20138 \u00b0C, use within 30 days.<\/p>\n<h2>FAQ<\/h2>\n<h3>Is Thymalin a single peptide or a mixture?<\/h3>\n<p>Thymalin is a multi-component polypeptide preparation \u2014 a mixture of short oligopeptides (mostly di-, tri-, tetra- and hexapeptides) extracted from thymic tissue. It is not a single-sequence peptide. The HPLC fingerprint is reproducible batch-to-batch but the preparation is characterised by mixture composition rather than single CAS \/ sequence.<\/p>\n<h3>How is Thymalin different from Thymosin Alpha-1?<\/h3>\n<p>Thymalin is a multi-component thymic extract; <a href=\"https:\/\/medsbase.com\/nl\/thymosin-alpha-1\/\">Thymosin Alpha-1<\/a> is a defined single-sequence 28-aa peptide. They are mechanistically related (both modulate thymic-axis immune function) but molecularly distinct.<\/p>\n<h3>What dose ranges are used in research?<\/h3>\n<p>Russian-clinical protocols use 5\u201320 mg\/d IM for 5-10 day courses. In-vitro lymphocyte-culture studies use micromolar peptide-mixture concentrations.<\/p>\n<div class=\"medsbase-trust-strip\" style=\"background: #f4f8fb; border: 1px solid #d8e3eb; padding: 12px 16px; margin: 20px 0 8px; border-radius: 4px; font-size: 14px;\"><strong>Why order research compounds from MedsBase:<\/strong> Lyophilized HPLC \u226599% peptides &amp; compounds \u00b7 COA available on request \u00b7 Discreet temperature-stable packaging \u00b7 Worldwide courier \u00b7 <a href=\"https:\/\/medsbase.com\/nl\/medsbase-re-shipment-assurance-policy\/\">Reshipment Assurance<\/a> on every order \u00b7 1,400+ verified <a href=\"https:\/\/medsbase.com\/nl\/reviews\/\">klantbeoordelingen<\/a><\/div>\n<p><!-- medsbase-related-alts-v1 --><\/p>\n<h2>Other Khavinson \/ Immune Bioregulator Research Peptides<\/h2>\n<ul>\n<li><a href=\"\/nl\/thymosin-alpha-1\/\"><strong>Thymosin Alpha-1<\/strong><\/a> \u2014 Defined single-sequence 28-aa thymic peptide \u2014 direct comparison<\/li>\n<li><a href=\"\/nl\/epitalon\/\"><strong>Epitalon<\/strong><\/a> \u2014 Khavinson pineal-axis tetrapeptide<\/li>\n<li><a href=\"\/nl\/pinealon\/\"><strong>Pinealon<\/strong><\/a> \u2014 Khavinson tripeptide bioregulator<\/li>\n<li><a href=\"\/nl\/selank\/\"><strong>Selank<\/strong><\/a> \u2014 Russian-developed anxiolytic \/ immune-modulating peptide<\/li>\n<li><a href=\"\/nl\/semax\/\"><strong>Semax<\/strong><\/a> \u2014 Russian-developed nootropic peptide<\/li>\n<li><a href=\"\/nl\/bac-water\/\"><strong>BAC Water (Bacteriostatisch Water)<\/strong><\/a> \u2014 Required for reconstituting any lyophilized vial \u2014 sterile, 0.9% benzyl-alcohol-preserved diluent<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>\u2705 Multi-component thymic polypeptide preparation (Khavinson bioregulator class)<br \/>\n\u2705 Mixture of short oligopeptides (di- through hexapeptides) \u2014 not a single sequence<br \/>\n\u2705 Thymic-axis T-cell maturation + age-related thymic involution research<br \/>\n\u2705 Published Russian-research immune-modulator (St. Petersburg Gerontology Institute)<br \/>\n\u2705 Lyophilized HPLC \u226599% with batch-fingerprint COA<\/p>\n<p><strong>Thymalin<\/strong> contains multi-component thymic-derived polypeptide bioregulator preparation.<\/p>","protected":false},"featured_media":71527,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[5426],"product_tag":[6545,6543,6494,6542,6544,6546],"class_list":{"0":"post-71497","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-peptides","7":"product_tag-immune-research-peptide","8":"product_tag-khavinson-peptide","9":"product_tag-research-peptide","10":"product_tag-thymalin","11":"product_tag-thymic-bioregulator","12":"product_tag-thymic-involution","14":"first","15":"instock","16":"shipping-taxable","17":"purchasable","18":"product-type-variable","19":"has-default-attributes"},"acf":[],"_links":{"self":[{"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/product\/71497","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/comments?post=71497"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/media\/71527"}],"wp:attachment":[{"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/media?parent=71497"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/product_brand?post=71497"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/product_cat?post=71497"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/medsbase.com\/nl\/wp-json\/wp\/v2\/product_tag?post=71497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}