Thymalin Dosage: How Pepti Prescribes It, in Units, mL and mg

The price is all-in, covering medication, physician review, refill management and shipping, with no separate membership fee. Pepti is cash-pay and does not bill insurance. These are the typical printed directions; your own directions are the ones on your vial. Thymalin is supplied as a vial only, in one strength.

Thymalin is a polypeptide complex, a mixture of short peptides, extracted from the thymus gland of young cattle. That sets it apart from almost every other peptide Pepti supplies: BPC-157 or thymosin alpha-1 is one defined amino acid sequence, while thymalin is a standardized extract. The group that developed it describes two dipeptides, Lys-Glu (KE) and Glu-Trp (EW), as its active components. It was developed in Leningrad from 1973 onward by Vladimir Khavinson and Vyacheslav Morozov, and has been used clinically in Russia for decades. The full reference is what is thymalin.

Pepti's directions are written in millilitres and units, because prescriptions are written in millilitres and insulin syringes are marked in units. On a U-100 insulin syringe, 1 unit is 0.01 mL, so 100 units is 1 mL and 25 units is 0.25 mL. A unit is a volume mark on the barrel, not a measure of how strong the medication is. Insulin syringe units explained goes through the standard in detail.

The milligram figure comes from the concentration on the label. Pepti's thymalin is 1 mg/mL, so:

That arithmetic is a way to read a label, not a way to set a dose. A vial labelled 5 mg is not a 5 mg dose: it is twenty 0.25 mg doses. If your label and your syringe seem to disagree, do not dose; message your care team. How long does a peptide vial last explains every number on a vial label.

Online thymalin charts quote doses in milligrams, micrograms and units interchangeably, and the numbers only line up if you know the concentration. The chart below is the conversion for a 1 mg/mL vial drawn with a U-100 insulin syringe. It is math only. It is not a menu of doses, and the only line that applies to you is the one that matches the number printed on your vial.

The rule behind every row: units divided by 100 gives millilitres, and at 1 mg/mL the millilitres and the milligrams are the same number. A chart written for a different concentration will give different milligram figures for the same units, which is the main reason not to dose from a chart, including this one.

At Pepti's typical directions, one 5 mg vial lasts four weeks:

Four weeks is why refills run every 28 days, one vial per fill. Vials are multi-dose solutions shipped ready to use, refrigerated with ice packs, with sterile syringes and alcohol prep pads. Nothing is mixed at home. Keep the vial cold and out of light, do not freeze it, and follow the beyond-use date printed on the label, which runs from first puncture. How to store peptides covers storage.

If a vial runs short before the refill, message your care team rather than adjusting anything yourself. If you miss a dose, follow your directions and do not take two doses to make up for one.

Thymalin's human literature does not supply a dose to copy, and it is worth knowing why before reading any chart online.

There are no randomized controlled trials of thymalin. Almost all of the literature comes from one research group and its collaborators, much of it in Russian-language journals, and the published abstracts in the live research do not describe the dose in a way that maps onto a subcutaneous weekday schedule. The mechanism work, on blood stem cells and cytokine output, is in cells in a dish. That is why your directions come from a physician who has reviewed your intake, not from a study table. The evidence, claim by claim, is in thymalin benefits.

Your physician sets your directions after reviewing your intake. Things that can lead to different directions, or a different product, include:

Thymalin vs thymosin alpha-1 dosing

These are the two immune peptides Pepti supplies, and they are not two doses of the same thing. Thymosin alpha-1 is a single 28-amino-acid synthetic sequence with international randomized trials; its 5 mL vial is 2 mg/mL, so the same 25-unit, Monday-through-Friday draw delivers 0.5 mg. Thymalin's 25 units deliver 0.25 mg of an extract. Same volume, different molecule, different milligrams. See thymosin alpha-1 dosage and thymosin alpha-1 vs thymalin.

Thymalin has been given to people in Russia for decades, and the published clinical reports do not describe a characteristic toxicity. That is a long clinical tradition, not a modern safety trial.

There is no established interaction list, because the trials that would produce one have not been run. Stop and contact your physician for any reaction that is severe, spreading, or involves difficulty breathing.

Thymalin has never been nominated for the FDA's 503A bulk drug substances list and appears in no category of the interim list updated 14 May 2026. It was never in Category 2, was not part of the April 2026 removals, and was not on the July 2026 Pharmacy Compounding Advisory Committee agenda. "Thymulin acetate," a different thymic peptide, sits in Category 3. So the accurate description is never nominated, never flagged, never reviewed. Thymalin is not an FDA-approved drug, and compounded medications are not FDA approved.

Thymalin cannot be bought legitimately without a prescription. As an extract rather than a single sequence, it depends even more than most peptides on the pharmacy that prepares it; vials sold "for research use only" have no pharmacy accountable for what is in them. See research peptides vs prescription peptides. The prescription route:

1. Complete a free online intake covering your history, including any autoimmune condition, immune diagnosis or immune-acting medication, and what you want help with.
2. A physician licensed in your state reviews it, usually within 24 hours.
3. If it is appropriate, a PCAB-accredited, FDA-registered US 503A compounding pharmacy prepares it to that prescription. Lot test results are published at /quality/lab-results.
4. It ships refrigerated with your directions printed on the vial.
5. Your care team stays reachable for questions and side effects.

Step by step: how to get thymalin prescribed online. Bloodwork is not required for any Pepti treatment. If your physician wants labs for your care, they'll ask through your account.