Epithalon Price: $25.00 Buys 9.64 mg, Not 10 mg

There is one listing and one size, so every row below is the same material on different terms. The last column is the only one that transfers to another storefront, because two vial prices are not comparable unless the vials hold the same mass.

A 10 mg vial holds ten milligrams, so the division is a decimal point moved one place, with none of the half cent rounding the $59.99 and $47.50 vials on this catalogue produce. The former list of $69.99 worked out at $7.00. Inverted, a dollar buys 200 mcg at list and 400 mcg with the code, which is the check to run on any listing quoting a bottle price with no mass beside it.

The tier rows are the honest comparison and not a win. Ten vials at the 10 percent tier is $4.50 a milligram, costs $450.00 to reach, and is 80 percent more per milligram than one vial bought with the code. Whether the code applies on top of a tier is undocumented, so do not build an order around it.

Every figure above counts ten milligrams because ten is the number printed on the vial. The certificate counts 9.64.

Nine cents a milligram, or 3.6 percent, and the direction is what makes it interesting. Kovera Labs certified net content at 9.64 mg against a written specification of 10 mg plus or minus 10 percent, and marked it a pass because 9.64 sits inside a band running from 9.00 to 11.00 mg. The vial is not short-measure in any regulatory sense. It is 0.36 mg under the number on its own cap, which at the code rate is 90 cents of material that is not in the bottle.

The purity row shows how little the second adjustment moves. Purity and net content answer different questions: 99.312% of 9.64 mg is 9.57 mg of Epithalon and about 0.07 mg of everything else, worth two cents a milligram. On a vial certified at 95 percent that correction would cost real money, which is why purity is worth reading next to the fill weight rather than instead of it.

One certificate exists for this compound, not two, and that limits how far the 9.64 mg travels. Selank and Semax each carry two published assays, so their spread can be measured. Here there is one data point, and one data point describes one batch and predicts nothing about the next.

The specification is not decoration. Ten percent either side of 10 mg means two vials can both pass and differ by 2 mg, and the price per milligram moves with them while the price per vial does not.

Fifty one cents a milligram separates the two ends of a specification that passes at both ends. That is 20 percent of the discounted price and larger than most of the gaps vendor comparison pages are built on, so anyone ranking storefronts on a two cent difference in headline rate is measuring something smaller than the tolerance of the vials being ranked.

Which is the argument for reading the batch number rather than the listing. If your batch carries no measured fill weight, the honest position is that you paid $2.50 per labelled milligram and do not know what you paid per actual milligram, anywhere between $2.27 and $2.78.

An underfill reads badly until you look at the vial sitting next to it.

Three vials from one storefront, three fill weights, one under the label. Our Selank price breakdown and Semax price breakdown run the same division from the other side of that gap.

Two readings of the Epithalon figure are available and only one survives. The first is that this vendor shorts its Epithalon customers, which does not fit a catalogue overfilling two neighbouring products by 12 and 23 percent. The second is that fill weight varies batch to batch and this one landed low, which fits everything on the table. What is worth crediting is not the number but the publication of it: printing 9.64 mg where 10 mg would have gone unchallenged is evidence about document handling that a purity figure of 99.312% cannot supply, because nobody publishes a bad purity result.

It also sets the expectation honestly. On labelled milligrams Epithalon sits between Selank and Semax; on assayed milligrams it is the dearest of the three, and the ordering flips purely on how much powder landed in each bottle.

The vial arrives dry and has no concentration until a volume is chosen for it. That choice sets the mg/mL and the smallest quantity a barrel can resolve, and it does not change the price by a cent. On this batch it does mean that any concentration written on the cap from the label figure is 3.6 percent optimistic.

At 2 mL the label arithmetic is as clean as this compound gets. One unit on a U-100 barrel is 0.01 mL, which at 5 mg/mL holds 50 mcg, so 10 units draws 500 mcg and the whole vial is 200 units of volume. Divide $25.00 by those 200 units and each unit of solution cost 12.5 cents.

The certificate then puts 9.64 mg into the same 2 mL: 4.82 mg/mL, 48.2 mcg a unit, and 482 mcg in the 10 units you believed held 500. The correction is arithmetic rather than chemistry, which is to divide the net content on your own batch certificate by your diluent volume instead of dividing the label figure. Reaching 500 mcg would take 10.37 units, and a U-100 barrel resolves one unit, so on this batch that round number is not drawable at that concentration. Our syringe measurement guide covers what a barrel can resolve, and the Epitalon reconstitution calculator will run any volume you enter. These are laboratory handling figures for research material and nothing else.

A rate per milligram prices powder. Four things it does not price move the real cost further than any discount here.

• Regulatory standing. Epitalon, which is how FDA and PubChem spell the molecule the market calls Epithalon, sits on FDA's list of bulk drug substances nominated for compounding but withdrawn. It was nominated, placed in category 2 under the interim policies, then withdrawn, and it appears in none of the three current 503A category lists as updated on 14 May 2026. It has no FDA approval for anything, and reading anywhere that it is category 2 today is reading a stale fact.
• The immunogenicity question. FDA writes that compounded drugs containing epitalon may pose risk for immunogenicity for certain routes of administration due to the potential for aggregation and peptide-related impurities. Aggregation and impurities are measurable, which is why the endotoxin and sterility lines on a certificate are worth more than the purity line most listings lead with.
• What the endotoxin line says. The report marks an endotoxin safety screen PASS against a limit of 0.5 EU/mL, printing no measured value and naming no method, so nothing on its face says whether the compendial bacterial endotoxins test at USP Chapter 85 was run or something faster. The Semax certificate from the same laboratory prints a number.
• What the compound is claimed to do. Epithalon is marketed on telomere and longevity claims resting largely on work from one research group, mostly in cell culture, rodents and Drosophila, much of it in Russian-language journals with limited independent replication. Reporting that those claims exist is not the same as their being established, and nothing in the literature establishes an effect on human lifespan. A certificate of analysis does not settle that question and $2.50 a milligram does not price it.

One smaller effect is large on a vial this size. Solution left in the vial shoulder and the needle hub cannot be recovered, and 0.05 mL out of 2 mL is 2.5 percent, moving the assayed rate from $2.59 to $2.66. Freight divides by ten milligrams rather than scaling with them, so it lands hard on one vial and softly on ten, and the $250 free carriage line moves further away because the code halves the number it measures. Our NAD+ price page runs that arithmetic on a gram vial.