How Much Do Research Peptides Cost? A Price per mg Guide
Research peptide prices look simple until you try to compare them. One vendor lists a 5 mg vial, another a 10 mg vial, a third sells a ten-vial kit, and all three are running a different sale. The listed price tells you almost nothing on its own.
The number that actually compares is cost per mg. This guide covers how to work it out, what moves it between vendors, and how sales and coupon codes change what you pay at checkout.
Why the listed price is the wrong number to compare
Vendors sell the same compound in different vial sizes, single vials and multi-vial kits, and occasionally as part of a blend. A lower listed price often just means less material. Comparing listed prices across different sizes compares packaging, not price.
How to work out cost per mg
Divide the price by the total milligrams in the listing.
- A 10 mg vial listed at $60 works out to $6.00 per mg.
- A 5 mg vial listed at $35 works out to $7.00 per mg. The cheaper vial is the more expensive material.
- A kit of ten 10 mg vials listed at $450 is 100 mg in total, so $4.50 per mg.
These figures are illustrations of the method, not current prices. For kits, count the milligrams across every vial in the kit, not just one.
What moves the price per mg between vendors
- Vial size and kit pricing. Larger vials and multi-vial kits usually lower the price per mg, but not at every vendor.
- Testing coverage. Vendors that publish full third-party testing across purity, identity, heavy metals, endotoxins and sterility often price higher. See the 7/7 testing standard for what that covers.
- Sales. Sitewide sales come and go weekly, which is why the cheapest vendor for a compound changes over time.
- Payment discounts. Some vendors take a further percentage off for Zelle or ACH payment.
- Shipping thresholds. Free shipping over a set order total can change which vendor is cheapest for a small order.
How sales and coupon codes stack
When a vendor runs a sale and a coupon code also applies, checkout applies them one after the other. The code comes off the already reduced price, so the two percentages never simply add together.
- Start with a $100 order.
- A 45% sale brings it to $55.00.
- A 15% code then takes 15% off $55.00, bringing it to $46.75.
Vendor promotions often advertise the two percentages added together as a single headline number. Checkout does not work that way, so we always list the sale and the code as separate numbers on every deal.
Where to see current cost per mg
The price table on MyPeptidePrice.com calculates cost per mg for every tracked listing, from vendor pricing that updates as vendors change it. Where a vendor supports it, the price after code SAMMYC is shown alongside the listed price.
Frequently asked questions
Is there a normal price per mg for a research peptide?
Not a single one. Price per mg varies widely between compounds, so the useful comparison is the same compound, in the same form, across vendors. The live price table does that comparison for every tracked vendor.
Is a bigger vial always cheaper per mg?
Usually, but not always. Larger vials and multi-vial kits tend to lower the price per mg, but some vendors price their smaller sizes more aggressively. Work out the price per mg for each size rather than assuming.
Do coupon codes stack with vendor sales?
At many vendors, yes. When they do, the code is applied to the already reduced price, not added to the sale percentage. Each deal on MyPeptidePrice.com lists the sale and the code as separate numbers so you can see exactly what applies.
Why does the same compound cost more at one vendor than another?
Testing coverage, batch size, kit pricing, shipping thresholds and payment discounts all move the final price per mg. A higher listed price can still be the cheaper option once those are counted.
Does MyPeptidePrice.com sell peptides?
No. MyPeptidePrice.com is an independent price comparison site. It does not sell, ship or process payments for any product. All compounds referenced are sold by third-party vendors for laboratory research use only.