PDRN vs TB-500
Side-by-side comparison of PDRN and TB-500: mechanism, half-life, dose range, safety profile, and vendor pricing.
Price snapshot
PDRN
TB-500
PDRN
PDRN (Polydeoxyribonucleotide) is a biotechnological compound derived from salmon sperm DNA (Oncorhynchus mykiss) through extraction, purification, and fractionation. It consists of polynucleotide chains with molecular…
Lowest listed price: $34.95 across 1 listing
Full PDRN profileTB-500
TB-500 is the name the market and the FDA use for a short synthetic fragment of thymosin beta-4: the seven-amino-acid, N-acetylated actin-binding sequence Ac-LKKTETQ (residues 17 to 23). Thymosin beta-4 itself is a…
Lowest listed price: $29.00 across 8 listings
Full TB-500 profileSide-by-side comparison
| Attribute | PDRN | TB-500 |
|---|---|---|
| Category | Skin & Hair | Injury, Repair & Recovery |
| Research Stage | Phase 4 | Preclinical |
| Mechanism of Action | PDRN exerts effects through two primary mechanisms: (1) Adenosine A2A receptor agonism — PDRN is hydrolyzed to deoxyadenosine fragments that activate A2A receptors on fibroblasts, endothelial cells, and macrophages. A2A activation stimulates VEGF production… | Actin Sequestration and Cytoskeletal Dynamics The primary molecular function of thymosin beta-4 (and the synthetic peptide sold as TB-500) is binding to monomeric G-actin in a 1:1 complex, preventing its polymerization into F-actin filaments (PMID: 1627561).… |
| Half-Life | Short (oligonucleotides degraded rapidly; tissue effects persist longer) | Plasma half-life is short - full-length thymosin beta-4 clears on the order of hours, while the short LKKTETQ actin-binding fragment clears within minutes. Tissue-level regenerative effects persist substantially longer than plasma exposure. |
| Typical Dose Range | — | 2000-5000 mcg (2-5 mg) subcutaneous 2x weekly loading; 2000 mcg (2 mg) weekly maintenance |
| Dosing Frequency | weekly | 2x per week during loading; 1x per week maintenance |
| Administration | Subcutaneous, Intradermal, Topical | Subcutaneous, Intramuscular |
| Side Effects | — | Generally well-tolerated. Occasional mild headache, nausea, or lethargy. Localized irritation at injection site. Rare: flu-like symptoms, temporary fatigue during initial use. |
| Molecular Weight | No single value - PDRN is a heterogeneous mixture of deoxyribonucleotide polymers (chain lengths ~50-2000 bp, roughly 50-1500 kDa) rather than one defined molecule [PMID:19860658]. | 889 Da (Ac-LKKTETQ); full-length thymosin beta-4 4963 Da |
| Common Vial Sizes | — | 2mg, 5mg, 10mg |
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PDRN: potential benefits
- Wound healing acceleration - enhanced angiogenesis, fibroblast proliferation, and collagen synthesis
- Diabetic foot ulcer healing - supported by a randomized, double-blind, placebo-controlled trial (complete healing 37.3% vs 18.9% for placebo) [PMID:24483158]
- Skin rejuvenation - clinical studies suggest improved texture and elasticity, though a 2024 systematic review found the aesthetic evidence base inconsistent [PMID:39198280]
- Hair loss - preliminary evidence only; a small uncontrolled study in female pattern hair loss reported improved hair count and thickness (not established for androgenetic alopecia) [PMID:25524027]
- Anti-inflammatory tissue remodeling - reduction of pro-inflammatory cytokines via adenosine A2A receptor signaling
- Aesthetic skin treatments - widely used in South Korean and European clinical practice
TB-500: potential benefits
- Accelerated dermal wound healing through enhanced keratinocyte and fibroblast migration, collagen deposition, and angiogenesis, including in diabetic and aged models (PMID: 12581423)
- Cardioprotection and tissue repair after myocardial infarction via ILK/Akt survival signaling in preclinical models (PMID: 17600280)
- Anti-inflammatory effects via NF-kB suppression and reduced pro-inflammatory cytokines (preclinical)
- Corneal wound healing and dry eye symptom improvement in topical ophthalmic (RGN-259) Phase 2 trials (PMID: 25826322)
- Enhanced hair follicle stem cell migration associated with hair growth (preclinical)
- Musculoskeletal recovery through collagen deposition and matrix remodeling (preclinical and equine data)
- Endothelial cell migration and vascular regeneration in ischemic tissues (preclinical)
Frequently asked
What's the difference between PDRN and TB-500?
PDRN is a skin & hair that pdrn exerts effects through two primary mechanisms: (1) adenosine a2a receptor agonism — pdrn is hydrolyzed to deoxyadenosine fragments that activate a2a receptors on fibroblasts,…. TB-500 is a injury, repair & recovery that actin sequestration and cytoskeletal dynamics the primary molecular function of thymosin beta-4 (and the synthetic peptide sold as tb-500) is binding to monomeric g-actin in a 1:1…. The two differ in mechanism, half-life (Short (oligonucleotides degraded rapidly; tissue effects persist longer) vs Plasma half-life is short - full-length thymosin beta-4 clears on the order of hours, while the short LKKTETQ actin-binding fragment clears within minutes. Tissue-level regenerative effects persist substantially longer than plasma exposure.), and typical dose range.
Which has the longer half-life, PDRN or TB-500?
PDRN has a half-life of Short (oligonucleotides degraded rapidly; tissue effects persist longer). TB-500 has a half-life of Plasma half-life is short - full-length thymosin beta-4 clears on the order of hours, while the short LKKTETQ actin-binding fragment clears within minutes. Tissue-level regenerative effects persist substantially longer than plasma exposure.. Longer half-lives generally mean less frequent dosing but slower on/off kinetics.
Which is cheaper, PDRN or TB-500?
Lowest listed price on BodyHackGuide: PDRN from $34.95, TB-500 from $29.00. Prices are pulled from the vendor listings tracked on BHG and change frequently. See the compare tables on each compound page for the current set of offers.
Can you stack PDRN and TB-500?
Stacking depends on mechanism overlap, safety profile, and goals. PDRN and TB-500 should only be stacked after reviewing each compound's individual protocol page, side effect profile, and any published interaction data. Use the BodyHackGuide stack builder for a structured review before combining research compounds.
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Research use only. BodyHackGuide is a research and price-comparison reference. The compounds discussed on this page are not approved by the FDA for human consumption and are sold strictly for laboratory research. Prices shown are pulled from vendor listings tracked on BHG and are subject to change. We earn an affiliate commission on some outbound clicks, and every vendor is ranked on the same public, reproducible methodology. See editorial standards and affiliate disclosure.