What should you check before buying research tirzepatide?
If you are comparing research-grade tirzepatide between suppliers, most pages will give you a purity number and a buy button. That is not enough to decide. Two vials with the same "99%" can be very different things, and two prices that look close can be far apart once you work out the cost per milligram and add shipping.
This guide is a checklist for comparing any supplier: what a quote should include, how to compare prices properly, what purity is worth asking for, and the signs that something is off.
The short answer
Before getting a tirzepatide quote, check five things: that the vial states how many milligrams it holds and comes lyophilized, the price per milligram with shipping added, the COA for the batch you will receive (not a sample), that the purity comes with its chromatogram, and that the supplier sells it clearly as research material and not for personal use. If any of the five is unclear, ask before you pay.
What should a tirzepatide quote include?
A serious quote is more than a price. It should tell you, in writing:
- Milligrams per vial. 5 mg, 10 mg, 20 mg. Without this you cannot compare anything.
- Form. Lyophilized powder in a sealed vial. Research tirzepatide ships dry; if you are offered a ready-made solution, ask why.
- Total price. Product, shipping and any payment fee. No new charge should show up at the end.
- Batch number. The one on the vial you will receive, so you can match it with its documentation.
- Shipping time and tracking. How many days it takes and whether you get a tracking number.
- Stated use. That it is sold as research use only (RUO) material. A supplier selling it with personal-use instructions is selling something else.
If you ask for all of this and the answer is just "it's 99%, the best on the market," you already know what the service will be like after you pay.
How do you compare prices between suppliers?
Divide the price by the milligrams. It is the only way to compare vials of different sizes. Then add shipping, because on small orders it changes the math a lot.
Using our own prices as an example:
| Vial | Price | Price per mg | With $180 shipping |
|---|---|---|---|
| Tirzepatide 5 mg | $480 MXN | $96 per mg | $132 per mg |
| Tirzepatide 10 mg | $690 MXN | $69 per mg | $87 per mg |
Notice two things. The 10 mg vial costs almost 30% less per milligram than the 5 mg one. And on a single-vial order, shipping raises the real cost by 26 to 38%. At Égida shipping is free above $2,000 MXN, so if you are ordering several vials it pays to put them in one order.
For a market reference: another Mexican store that publishes its prices sells a 10 mg vial for $950 MXN (price published October 2026), or $95 per mg, and lowers the price per milligram on larger vials. That is why the label price is not enough. If you are comparing, do the same math for every supplier: price divided by milligrams, plus shipping, plus payment fees.
Current prices for 5 mg and 10 mg tirzepatide are on its page, with the button to add it to your cart.
What HPLC purity should tirzepatide have?
In the research market you will almost always see "≥98%" or "≥99%" by HPLC. The number itself matters less than it seems. What matters is that it is backed up.
That percentage measures how much of what the instrument detected belongs to the main peak. It does not tell you how much peptide is in the vial, and it does not confirm the molecule is tirzepatide. A vial can test "99%" and still hold fewer milligrams than the label says, because the powder also contains salts and water. We explain it in what HPLC purity means.
So rather than asking for a high number, ask for three things:
- The batch chromatogram, not just the figure. It is the chart the percentage comes from.
- Identity by mass spectrometry. Tirzepatide has a molecular mass of about 4,813 daltons. The report should show a measured value close to that.
- The name of the lab that ran the analysis, and the date.
A "99.9%" with no chromatogram is worth less than a "98.5%" with its chart, its mass and its lab.
What should the batch COA include?
The Certificate of Analysis (COA) is the document that brings all of the above together. To be useful, it has to be for the exact batch you will receive. A generic "tirzepatide" COA proves nothing about your vial.
At a minimum it should show: compound name, batch number, analysis date, HPLC purity with chromatogram, mass by mass spectrometry, and who ran the tests. When the vial arrives, the printed batch number has to match the one on the document. To go through it line by line, the guide to reading a COA explains each part, and how to verify a supplier covers what to ask before you pay.
Signs that something is off
- Tirzepatide drops, patches, pills or pens. Research tirzepatide is sold as lyophilized powder in a vial. These are personal-use formats, and they appear alongside vials in the 2026 health alert explained below.
- Personal-use instructions. If the page tells you how much to take or promises results in people, it is not a research supplier.
- A price far below everyone else. Making tirzepatide costs money. A price that does not line up with anyone else usually has a reason.
- A COA with no batch number, or the same document for every batch.
- Payment only through untraceable methods, and no real email or contact details.
If you are looking for the medication
This page is for people buying laboratory material. If you are looking for tirzepatide for yourself, what you want is the prescription medication, which is sold in pharmacies on a doctor's orders.
In February 2026 Cofepris, Mexico's health regulator, issued an alert about tirzepatide products sold without health registration online, on social media and in apps, as drops, patches, pens and vials, and Profeco repeated it in March. It asked people not to buy them and to see a health professional. Égida's vials are research material, are not intended for human consumption, and are not sold for personal use. The full framework is on our compliance page.
Shipping and receiving
Égida ships from Guadalajara to anywhere in Mexico in 24 to 72 business hours, with a tracking number and plain packaging that does not show what is inside. We do not ship outside Mexico. Details are on the shipping page, and how it works step by step in discreet shipping in Mexico.
When the vial arrives, check that the powder looks dry, that the seal is intact, and that the printed batch number is legible; write it down. If you will store it before opening it, how to store peptides covers it, and the reconstitution calculator helps with concentration when the time comes.
If you are still getting to know the molecule, start with what tirzepatide is. And if you are comparing it with the triple agonist, see retatrutide vs tirzepatide or the 10 mg retatrutide page. If you are quoting it too, what to check before buying research retatrutide does the same per-milligram math.
Sources
- Profeco. Profeco y Cofepris alertan por comercialización ilegal de productos con tirzepatida. March 2026, reproduced by Salud y Fármacos.
- PubChem. Tirzepatide (molecular mass). PubChem