Semaglutide cost and how to buy

Semaglutide cost per vial and per mg

The table lists the current price of each semaglutide strength in our catalog, with the cost per mg in the last column. Each row is one research vial.

To turn any other vial price into semaglutide cost per mg, divide the price by the milligrams on the label. That single step puts a small vial and a large one, or two catalogs, on the same footing.

Here is an example with numbers that are not our sizes or prices. A 4 mg vial priced at 100 costs 25 per mg, and a 10 mg vial priced at 200 costs 20 per mg. The larger vial costs twice as much up front and 20% less per mg.

Keep two limits in mind. Per-mg math assumes the vial holds what its label says, so it is only as reliable as the lot's test results. And a lower cost per mg saves money only if the study uses the whole vial.

Semaglutide cost for a whole study

Cost per mg is half the answer. The other half is how the vial sizes fit the total the study needs. Here are two study totals, using the same example numbers (4 mg vials at 100 each, 10 mg vials at 200 each):

At 12 mg, the smaller vial is cheaper for the study even though it costs more per mg. At 18 mg, the larger vial wins by 100. Run both columns for your own total before you pick a strength, using the prices in the table above.

What drives semaglutide cost

The first two rows deserve the most attention. A price that looks low is worth less if the lot behind it has no matching certificate. The form row is about identity: a vial labeled only "semaglutide" should come with documents that say which substance was measured.

How to buy semaglutide for a research study

1. Choose the strength. The semaglutide for sale page lists each vial size with its price and stock status.
2. Work out the total. Add up the milligrams the study plan needs, divide by the vial size and round up to whole vials. Compare the total cost for each size, not just the cost per mg.
3. Read the documentation. Check our lab results page, which lists lab documents by lot when they are available, and ask for the certificate for the lot you will receive. Match the lot number on the certificate to the one on the vial label.
4. Add the supplies. Bacteriostatic water and other lab supplies are separate items. Add what the study needs from the supplies page.
5. Check delivery and returns. Read the shipping page and the returns page before you check out.
6. Confirm research use. Every order is for laboratory research only, under our research use policy.
7. Check the order on arrival. Count the vials, confirm each strength, and match every lot number to its certificate. Record the arrival date with the lot number in your lab records.

Questions about an order, a lot or a certificate can go through our contact page before you buy semaglutide.

Checking a semaglutide vendor

Start with identity, because a product name alone proves nothing. PubChem lists semaglutide under CAS number 910463-68-2.¹² The Ozempic label gives the formula C187H291N45O59 and a molecular weight of 4113.58 g/mol, and PubChem's computed weight is 4114 g/mol.⁵¹³ Identity results on a certificate should fit these values. If they do not, the vendor should explain why.

Then look at the testing itself. A useful certificate names the lab, the test date and the method, and it gives a measured result for each test. Purity and amount answer different questions. A high purity percentage says nothing about how many milligrams went into the vial, so look for a measured amount as well.

Before ordering, a vendor should be able to answer five questions:

• Which lot will ship, and where is its certificate?
• Which form of semaglutide did the lab measure?
• Which lab ran the tests, and on what date?
• Which tests were run, and which were left out?
• How will the order be packed and shipped?

Finally, check the seller's record. FDA posts its warning letters on its website, and the regulatory section below cites three sent to sellers of research-labeled semaglutide. The same checks apply to us.

Regulatory status

Semaglutide is the active ingredient in Ozempic, Rybelsus and Wegovy, and every FDA-approved semaglutide product is prescription only.⁶⁷⁸⁹ Research-labeled semaglutide is not covered by those approvals: in warning letters, FDA has told sellers that no approved application was in effect for their products.²¹⁰ Letters sent in February 2024, December 2024 and February 2025 found that research-labeled semaglutide sold online was intended as a drug for human use, despite its labels, and was an unapproved new drug.¹⁴²¹⁰

FDA's GLP-1 safety page says the agency has warned companies that illegally sold semaglutide falsely labeled for research purposes or not for human consumption.¹ It adds that unapproved versions of GLP-1 drugs do not undergo FDA review for safety, effectiveness and quality before they are marketed.¹ D2C Peptides sells semaglutide vials for laboratory research only. For background on the compound, read What is semaglutide?.