Discount
50% off
Typically 37% below market with code
37 peptides
Discount codes for 47 research peptide vendors, recorded from each vendor's own affiliate program and running up to 50% off. Every code below is an affiliate code that pays PeptideScouter a commission at no extra cost to you - see the affiliate disclosure. Each vendor's typical price shows where its peptides land against the market once its code is applied. 12 of these vendors also have a sale running today, noted under the discount. Every current sale is on the vendor sales page.
The codes below were verified on November 7, 2026. Prices refreshed daily.
"Typical price with code" compares the single vials a vendor has in stock, with their code applied, against the market for each peptide and vial size: the middle of other vendors' list prices per milligram, before any code of theirs. The figure is the vendor's middle result across those vials, so a large percentage off a high list price can still land above market. A result within 10% of the market either way reads near market, and one more than 10% above reads above market with no percentage. Each vendor's coupon page shows the comparison for their most popular peptides. A code with no fixed percent shows no figure, because its price changes with the vendor's current promotion. Kits, capsules, sprays and millilitre-dosed products are left out, as is a vial size fewer than three other vendors have in stock. The market price can differ from the median on a peptide's own page, which counts every size at list price. Prices carry a sale when the vendor lists the sale price, and an offer that only appears in the cart, such as buy one get one free, is not counted. To compare vendors on a single compound, open that peptide's page: the vendor comparison there applies each code and sorts by effective price.
Indexed prices for the same peptide commonly vary several-fold between the cheapest and most expensive vendor PeptideScouter tracks. A 10% code is small against a spread that wide, which is why the codes on this page are worth applying after choosing a vendor on price rather than before. The peptide and category pages normalize every listing to United States dollars per milligram so vial sizes, kits and multi-vial packs are directly comparable, and the code is then applied on top.
Coupon code, discount code and promo code all name the same thing: a string entered at checkout that takes a percentage off the cart. Vendors, suppliers and sources are likewise used interchangeably for these businesses across storefronts and search, and this site says vendor throughout. Codes are per vendor, not per peptide: a vendor's code applies across their catalog, so there is no separate code for an individual compound. Where a vendor publishes no code, PeptideScouter still indexes their listed prices.
Most research peptide vendors run an affiliate program that issues each partner a single code. Entering it in the coupon or promo code field at checkout takes a percentage off the cart subtotal but does not change shipping cost or delivery time. PeptideScouter's code at every vendor above is some form of SCOUTER or PEPTIDESCOUTER. The exact string differs per vendor and is listed for each one above.
The largest discount recorded on PeptideScouter is 50% at Ascension Peptides. A larger percentage off a higher list price is not the same as a lower final price, so the percentage is the weaker measure. The typical price figure is the closer one: it sets each vendor's single vials, with their code applied, against other vendors' list prices for the same peptide and vial size, per milligram of peptide.
No. A code lowers one vendor's price, but for any given peptide the lowest price often comes from a vendor with a smaller code or no code at all. The peptide pages compare every indexed vendor side by side and show the effective price with each vendor's code applied, which is the comparison that answers this question for a specific compound.
12 vendors on this page have a sale running today, and where PeptideScouter has confirmed whether that vendor's code stacks with it the entry says so. Every current sale is listed with its end date on the vendor sales page. Otherwise it varies by vendor. PeptideScouter's daily check confirms only that a code applies at its published percentage on one ordinary in-stock item. It does not test how that code interacts with a sale price. Plenty of vendors let a discount code stack on top of a sale price, while others accept one code per order and some exclude sale items from codes entirely. Where a sale price is already below what the code would take off, the sale is the better price on its own. The vendor's own checkout and terms are the authority on this, not this page.
Each code is the one issued to PeptideScouter by that vendor's own affiliate program, and most are re-verified at the vendor's own checkout every day - each vendor's coupon page shows its most recent verification date. No order is placed in the process, and vendors sometimes exclude sale items or bulk kits without notice. The prices behind these figures are refreshed daily from each vendor's catalog. If a code fails at checkout, email hello@peptidescouter.com and we will re-check it.
Yes. These are affiliate codes: the vendor pays PeptideScouter a commission on orders that use them, at no additional cost to you - the code lowers your total rather than raising it. The list above is sorted by discount size by default and can be re-sorted by any column, never by what any vendor pays us, and PeptideScouter does not rank or recommend vendors. See the affiliate disclosure for the full arrangement.