Where to buy Epitalon · research sourcing & COA
Where to buy Epitalon for research — and why a tiny four-residue peptide is the hardest kind to verify.
Epitalon (also written Epithalon or Epithalamin, sequence Ala-Glu-Asp-Gly, abbreviated AEDG) is a synthetic tetrapeptide that shows up constantly in the research-supply space, usually attached to the same '≥99% pure, third-party tested' badge every other listing carries. What that badge quietly ignores is that Epitalon is one of the harder research peptides to actually verify — not because the chemistry is exotic, but because the molecule is so short and so acidic that the ordinary analytical methods a bargain seller reuses for a thirty-residue peptide can genuinely misread it. Two of its four residues are the acidic amino acids glutamate and aspartate, it has no protecting groups and no C-terminal amide, and at only four residues it barely interacts with a standard reversed-phase HPLC column. This page is written for researchers sourcing Epitalon for laboratory use: what a real lot-matched certificate of analysis should prove, why a single parent mass cannot confirm the AEDG sequence, and where Titan's honest catalog fits. It is for in-vitro laboratory and research use only (RUO). No human-use, dosing, telomerase, pineal, sleep, longevity, anti-aging, or any other outcome is claimed anywhere on this page.
Epitalon is a four-residue acidic tetrapeptide
Epitalon is Ala-Glu-Asp-Gly — just four amino acids, two of which (glutamate and aspartate) are acidic, with a free N-terminus, a free C-terminal carboxyl, and no protecting groups or amide cap. That structure is simple to draw and surprisingly awkward to confirm. A short, highly acidic peptide behaves very differently on the instruments a seller uses than the longer, more hydrophobic peptides most 'tested' badges were designed around. So the first thing to understand about buying Epitalon is that the molecule itself changes what a meaningful certificate has to do — a badge copied from a larger SKU is not automatically valid here.
How to read a COA →So small it barely holds on the HPLC column
Standard reversed-phase HPLC — the workhorse behind almost every 'purity %' figure — separates compounds by how strongly they stick to a hydrophobic column. A tiny, acidic four-mer like Epitalon sticks weakly and elutes right near the void, close to the solvent front where salts and small polar junk also come off. On a method that was never adapted for it (ion-pairing reagent, a suitable low-organic gradient), impurities can co-elute with the peak or the compound can be poorly resolved altogether — and the reported purity number stops meaning what a buyer assumes it means. A credible Epitalon COA shows the actual chromatogram and a method suited to a short acidic peptide, not a recycled gradient.
Current-lot COA checklist →Parent mass alone cannot confirm the sequence
With only four residues, identity is easy to get wrong in a way a single mass reading will never expose. A batch that scrambled the residue order — or substituted a near-composition impurity — can share the same total mass as genuine Ala-Glu-Asp-Gly, because mass counts atoms, not order. Confirming you actually received AEDG rather than a same-mass rearrangement takes tandem MS (MS/MS) that reads the fragment ladder and pins the sequence, not just a rounded parent-ion number. A certificate that reports one mass and calls it 'identity confirmed' has confirmed a formula, not the peptide.
What COA-verified means →Why generic 'tested' badges fail on Epitalon
A one-size-fits-all 'third-party tested, 99% pure' stamp assumes a peptide where a purity number carries most of the meaning and a routine method resolves it cleanly. Epitalon breaks that assumption on two fronts at once — it under-retains on an un-adapted HPLC method, and its four-residue length makes parent mass ambiguous. A vendor that prints the same badge for Epitalon that it prints for a thirty-mer is signalling it did not stop to consider what this specific molecule needs. The right buyer response is to ask for the chromatogram, the HPLC method, and the MS/MS identity, and to walk if all that comes back is a recycled certificate with a new product name on top.
Supplier checklist →Net peptide content, not just the label weight
Short synthetic peptides ship as a lyophilized powder that is rarely 100% peptide — residual synthesis salts (trifluoroacetate or acetate), counter-ions, and bound water make up part of the vial weight. For a compact acidic peptide like Epitalon that fraction is not trivial, so a lot that is 'high purity' by chromatogram can still contain meaningfully less actual peptide per milligram than the label implies. A thorough COA states net peptide content (or the salt form and water content used to derive it) so a researcher can reason about what is actually in the vial, rather than assuming the printed milligrams are all peptide.
Reconstitution & handling →What Titan actually stocks (honest)
Titan does not stock Epitalon. Its RUO catalog is a focused set of in-house-tested research peptides — BPC-157, TB-500, retatrutide, the CJC-1295 + Ipamorelin blend, and a line of pre-mixed nasal-format peptides — not every compound the internet files under 'bioregulator' or 'longevity research.' Rather than list a tetrapeptide it does not verify in-house, Titan points researchers to the compounds it does test and releases with lot-matched sheets, and to the verification standard that applies to any research material, Epitalon included. The links below cover the honest sourcing context and the in-catalog options.
Best research peptides (in stock) →The detail, in plain terms
Epitalon sourcing, in plain terms.
Epitalon is a four-residue acidic tetrapeptide (Ala-Glu-Asp-Gly). Its short, acidic structure — not a headline purity number — decides whether the certificate in front of you actually measured what it claims. Verify the HPLC method suits a short acidic peptide and that identity was confirmed by MS/MS sequence, not a lone parent mass; treat a recycled purity percentage as decoration until the chromatogram and method back it up.
- What it is
- Ala-Glu-Asp-Gly (AEDG) — a synthetic four-residue tetrapeptide, free acid, no amide cap.
- The size catch
- Only four residues, two acidic — under-retains near the void on un-adapted reversed-phase HPLC.
- Method matters
- Needs an ion-pairing / low-organic HPLC method tuned for a short acidic peptide, with the chromatogram shown.
- Identity check
- Parent mass alone can't confirm sequence at four residues; MS/MS should pin the AEDG order.
- Also confirm
- Net peptide content, salt form (TFA/acetate), water content, and the lot number matching the unit received.
- Titan stocks
- Not a SKU — honest redirect to in-stock, in-house-tested research peptides.
Questions researchers ask
Before you order.
- Does Titan sell Epitalon?
- No — Epitalon is not a Titan catalog product. Titan's RUO line centers on in-house-tested research peptides such as BPC-157, TB-500, retatrutide, the CJC-1295 + Ipamorelin blend, and pre-mixed nasal-format peptides. Rather than list a tetrapeptide it does not verify in-house, Titan points researchers to the compounds it does test and to the COA standard that applies to any research compound, Epitalon included.
- Why is a short peptide like Epitalon harder to verify, not easier?
- It is counterintuitive, but a four-residue acidic peptide stresses the ordinary methods a seller reuses. On standard reversed-phase HPLC it barely retains and elutes near the void, close to the solvent front, so an un-adapted method can under-resolve it or let impurities co-elute with the peak — which quietly weakens the reported purity figure. And at only four residues, a single parent mass cannot distinguish genuine Ala-Glu-Asp-Gly from a same-composition rearrangement. A credible COA therefore shows a chromatogram from a method suited to a short acidic peptide plus an MS/MS identity, not a recycled badge. This is a verification point, not a claim about any effect.
- What should a real Epitalon COA show?
- A credible lot-matched certificate should confirm identity as the AEDG tetrapeptide by tandem MS (MS/MS) that reads the sequence rather than only a parent mass, resolve purity from an HPLC chromatogram run on a method appropriate for a short acidic peptide (shown, not just a number), state net peptide content along with the salt form and water content, and carry a lot number matching the code on the unit you receive. A generic 'third-party tested, 99% pure' stamp with none of that is not verification for a four-residue peptide.
- Why can an Epitalon batch read as high-purity and still be wrong?
- Two reasons specific to this molecule. First, if the purity was measured on a reversed-phase method never adapted for a tiny acidic peptide, Epitalon under-retains near the void and the reported figure may not reflect a properly resolved peak. Second, because four residues give an ambiguous parent mass, a scrambled-sequence or same-composition impurity can pass a mass-only 'identity' check. A high number on the wrong method, or a mass without a sequence, is not the same as confirmed Epitalon — which is why the method and the MS/MS matter more than the percentage.
- Is Epitalon for human use?
- No. Anything discussed here is strictly for in-vitro laboratory research. Epitalon supplied as a research chemical is not for human or animal consumption, and no telomerase, pineal, sleep, longevity, anti-aging, or any other outcome is claimed for it. Nothing on this page is a dosing schedule or a human-use protocol — it is a sourcing and verification guide only.