Epitalon (Ala-Glu-Asp-Gly) is a synthetic tetrapeptide studied for telomerase activation and telomere elongation — with in vitro data showing it surpassed the Hayflick limit in human fibroblasts, and in vivo data showing 12.3% maximum lifespan extension in mice. At only 4 amino acids and ~390.3 Da, it is simultaneously the cheapest peptide to produce in the buying guides cluster and one of the hardest to verify with standard analytical methods.
This article applies 7 verification checks to Epitalon using data from Peptigrity's independent lab tests, community reviews, and reviewed peptide shops. Peptigrity does not sell peptides or recommend vendors.
What Is Epitalon and What Does the Research Actually Show?
Epitalon is a synthetic tetrapeptide (Ala-Glu-Asp-Gly, MW ~390.3 Da, CAS 307297-39-8) derived from Epithalamin — a bovine pineal gland extract — developed by Prof. Vladimir Khavinson at the St. Petersburg Institute of Bioregulation and Gerontology, with the strongest evidence for telomerase reactivation and telomere elongation in both cell culture and animal models.
The foundational study: Khavinson et al. (2003) added Epitalon to human fetal fibroblasts that lacked detectable telomerase activity. The result — telomerase catalytic subunit expression was reactivated, enzyme activity increased, and telomere lengthening occurred, extending the cells' proliferative capacity from termination at the 34th passage to over 44 passages — surpassing the Hayflick limit. In vivo, long-term Epitalon administration in SHR mice increased maximum lifespan by 12.3%, reduced spontaneous tumour incidence, and decreased chromosomal aberrations. In Drosophila melanogaster, Epitalon extended lifespan by 11–16% at very low concentrations.
Human clinical data exists: Epitalon significantly increased telomere lengths in blood cells of patients aged 60–80, restored melatonin secretion in aged humans and monkeys, and produced positive clinical effects in 90% of retinitis pigmentosa patients in a small trial.
Additional mechanisms beyond telomerase: melatonin synthesis restoration via pineal gland modulation, antioxidant enzyme activation (SOD, glutathione peroxidase, glutathione-S-transferase), IL-2 mRNA activation for immune function, and MMP-9 inhibition (anti-metastatic).
An evidence caveat Peptigrity considers important: most Epitalon research originates from one institute led by one researcher (Khavinson). Independent replication outside Russia was limited until recently. A 2025 study (Araj et al., PMC12411320) confirmed telomere elongation via telomerase upregulation in both breast cancer cell lines and normal fibroblasts — the first substantial independent confirmation. The evidence is promising but concentrated. Treat with appropriate scientific caution.
Regulatory status: Epitalon is NOT FDA-approved, not on Category 2, and not WADA-prohibited.
What Makes a Tetrapeptide the Hardest to Verify?
Epitalon is the smallest peptide in the buying guides cluster at only 4 amino acids — trivially cheap to synthesise, but paradoxically one of the hardest to verify because its low molecular weight reduces the specificity of standard MS identity confirmation.
For context: BPC-157 = 15 AA (~1,419 Da), ipamorelin = 5 AA (~711 Da), semaglutide = 31 AA (~4,113 Da). Epitalon = 4 AA (~390.3 Da) — roughly one-tenth the mass of semaglutide.
3 verification problems specific to tetrapeptides:
Trivially cheap to synthesise. Any peptide synthesis house can produce Ala-Glu-Asp-Gly. Barrier to entry for vendors is nearly zero. More vendors offering it creates a wider quality range — and some cut corners on purification because margins are tight on a 4-amino-acid chain.
MS identity is less specific at low MW. Many tetrapeptides and small molecules exist near ~390 Da. A MW match at ~390 Da is a weaker identity signal than a match at ~4,813 Da (tirzepatide). HPLC retention time comparison becomes essential — it provides the chromatographic fingerprint that MS alone cannot for short-sequence peptides.
Single-residue substitution is harder to detect. At only 4 amino acids, one wrong residue changes 25% of the sequence. The difference between Asp and Glu is only ~14 Da — detectable by high-resolution MS but potentially missed by standard instruments. HPLC catches this substitution by retention time shift.
The practical consequence: for Epitalon, HPLC and MS combined provide substantially more confidence than either method alone. This is the strongest case in the entire buying guides cluster for requiring both analytical methods on the CoA.
7 Things to Check Before Ordering Epitalon
The same 7 checks apply — with Epitalon, the combined use of HPLC and MS together provides more confidence than either method alone, because the tetrapeptide's low MW reduces the specificity of MS-only identity confirmation.
1. Third-Party HPLC Purity (≥98%)
HPLC is critical for Epitalon — it provides retention time confirmation that MS alone cannot offer for a tetrapeptide near ~390 Da. A clean single peak at the expected retention time is the strongest identity signal for this compound. Cross-reference on peptigrity.com/lab-tests — filter by "Epitalon" or "Epithalon." The study "Peptide Impurities in Commercial Synthetic Peptides" (PMC2238048) demonstrated that contamination at 1% produced measurable biological effects — for a tetrapeptide where impurities may include trivially similar small molecules, this threshold matters.
2. Mass Spectrometry Identity (~390.3 Da)
MS confirms MW is consistent with Ala-Glu-Asp-Gly. However, this is a weaker identity signal than for larger peptides — many small molecules exist near 390 Da. High-resolution MS is recommended to differentiate from single-residue substitution variants (Asp→Glu = ~14 Da shift). HPLC + MS combined provides stronger confidence than either alone. See Mass Spectrometry for Peptides: Verifying Identity & Molecular Weight for the methodology.
3. CoA From a Named, Verifiable Lab
Verify through the lab's portal: Janoshik (Task #), Chromate (QR code + Job Number), Freedom Diagnostics (online system). For Epitalon: confirm both HPLC purity and MW match expected values. Amino acid sequence confirmation on the CoA is an extra quality signal worth requesting for tetrapeptides. See Red Flags in Peptide Certificates of Analysis for the fraud detection checklist.
4. Independent Data on Peptigrity
Search peptigrity.com/lab-tests for the vendor + Epitalon. Check the shop's profile on peptigrity.com/shops — trust score, ✓ Lab Verified badge, and test count. Independent community-submitted data carries more weight than vendor-published CoAs — especially for a tetrapeptide where production is trivially easy.
5. Community Reviews
Read reviews on the vendor's Peptigrity page. Each includes 5 sub-ratings: Quality, Delivery, Pricing, Customer Service, and Product Accuracy. Longevity-focused buyers represent a specific community — look for vendor consistency across multiple compounds in the longevity category.
6. Vial Presentation and Storage
Lyophilised Epitalon should be a white to off-white powder. Not lipidated — highly stable in lyophilised form with a standard storage profile. Most RUO vendors ship at ambient temperature. For 2–5 day domestic transit of lyophilised powder, this is acceptable. Store at −20°C on arrival. After reconstitution: 2–8°C, use within 28 days. Epitalon is commonly sold in larger vial sizes (10, 20, 50 mg) reflecting higher dosing protocols used in research.
7. Pricing Reality Check
Research-grade Epitalon pricing (March 2026):
10 mg vial: $20–50.
20 mg vial: $35–80.
50 mg vial: $70–150.
Epitalon is one of the cheapest peptides per mg — a 4-amino-acid chain is the simplest synthesis in the cluster. Below $10 for 10 mg is suspicious even so — purification and analytical verification still cost money. An inverse pricing signal: Epitalon should cost less than longer, more complex peptides (BPC-157, ipamorelin, semaglutide) from the same vendor. If it costs more, the vendor may not understand synthesis economics. See Peptide Purity Standards: What Percentage Is Actually Acceptable? for the quality-price framework.
Epitalon on Peptigrity's Lab Test Database
Filter by Epitalon at peptigrity.com/lab-tests to compare independent purity data across vendors before ordering.
Community-submitted data from third-party laboratories represents real products from real buyers. Epitalon's low synthesis cost means more vendors offer it — making independent verification through Peptigrity even more important for distinguishing quality vendors from low-effort producers. Use the data before ordering. Browse the Epitalon peptide guide for the compound profile alongside lab data.
Frequently Asked Questions
What purity should research-grade Epitalon have?
≥98% HPLC from a third-party lab. For a tetrapeptide, HPLC retention time confirmation is as important as MS identity — both methods combined provide the strongest verification. Cross-reference on peptigrity.com/lab-tests.
How much does research-grade Epitalon cost?
$20–50 for 10 mg, $35–80 for 20 mg, $70–150 for 50 mg. One of the cheapest peptides per mg. Below $10 for 10 mg is suspicious. Should cost less than longer peptides like BPC-157 or ipamorelin at the same vendor. Compare across vendors on peptigrity.com/shops.
Is Epitalon the same as Epithalon?
Yes — Epitalon, Epithalon, and Epithalone are all names for the same tetrapeptide (Ala-Glu-Asp-Gly, MW ~390.3 Da, CAS 307297-39-8). Vendors use different spellings interchangeably.
Is the telomere research on Epitalon reliable?
Most research originates from one institute in Russia (St. Petersburg Institute of Bioregulation and Gerontology) led by Prof. Khavinson. A 2025 study from outside Russia (Araj et al., PMC12411320) independently confirmed telomere elongation via telomerase upregulation in multiple cell lines — the first substantial independent replication. The evidence is promising but concentrated in a small number of research groups. Treat with appropriate scientific caution.
Is Epitalon FDA-approved?
No. Epitalon is not approved by the FDA or any Western regulatory authority for human use. Not on Category 2. Not WADA-prohibited. Available only as a research compound from RUO vendors.
For the complete buyer verification framework, see How to Verify Peptide Quality Before You Buy and What to Look for in a Peptide Shop: A Buyer's Checklist. Browse all peptide shops ranked by trust score.
This article is for educational and informational purposes only and does not constitute medical advice. Epitalon is a research compound not approved by the FDA for human use. Most research originates from a single institute in Russia with limited independent replication. Research-grade peptides have no mandatory manufacturing standards. Always consult a qualified healthcare provider before using any peptide or research compound. Peptigrity is an independent review platform and does not sell, endorse, or recommend specific products or vendors.
