Best value
20% off
New customers
20% off your first order. New customers only. First order.
Use at oathresearch.comLive Oath codes
Oath promo codes that work right now
One saves new customers 20% on their first order. The other takes 15% off, every time, no minimum.
15% off
Everyone
15% off any order. No minimum. Applies to repeat orders.
Use at oathresearch.comBoth codes were tested against Oath Research's live checkout on 13 August 2026 and applied correctly. This site is an Oath Research deal page — it is paid nothing when you use a code, and there is no commission on either of them.
- 425+ batches tested
- Free ship over $250
- No commission, ever
- US orders only
Two codes work at Oath Research checkout today. Enter one at the cart, and the price drops before you pay.
Oath Research sells research peptides, and right now two promo codes work at checkout. One is for new customers only and takes 20% off a first order. The other has no minimum and works every time, including on repeat orders. You don't need an account to see either code, and you don't need to hunt through a forum for it.
Oath Research and Oath Peptides are the same company — you'll see both names used, and either one gets you to the same checkout. This page gets you a working code fast, then shows you why Oath is worth ordering from at all: batch-level testing, a real return policy, and shipping that says what it means.
Nobody takes a commission when you use these codes. That's true today, and it's the whole point of this page. If a code ever stops working, it moves to the expired list, not quietly off this page.
Why the Codes Are Worth Using
Oath Research tests every batch it ships and publishes the results. That record is why these codes are worth using, not just the discount. You can check the numbers yourself before you buy.
- 425+batches testedas of Aug 2026
- 99.63%avg. puritytrailing 12 months
- 250/425COAs publicno account needed
- $250free ship thresholdUS orders only
Testing you can check yourself
Oath tests every batch it ships, not a sample here and there. Each certificate names the lab — Freedom Diagnostics, an independent third-party partner — and reports purity by HPLC-UV with LC-MS to confirm identity. Average purity sits at 99.63% over the trailing twelve months. You don't have to take a site's word for any of it: 250 of the 425 certificates on file are searchable by batch number without creating an account. The rest are there too, just behind a free login.
A real address, not just a form
Plenty of research-chemical sites list only a contact form and nothing else. Oath publishes a phone number, +1 480-999-1097, and a street address in Gilbert, Arizona. Three separate business directories confirm both independently. We can't tell you someone picks up on the first ring — that part's untested, and we won't pretend otherwise. What's verified is that the number and address are real, public, and checkable, which is more than a form gives you. Their own contact form requires an account before you can even send a message; the phone number doesn't.
Shipping that says what it means
Most orders go out on 2-day business air, usually UPS. Place your order before noon Mountain time on a weekday and it ships the same day. Oath is careful about the wording here, and so are we: they guarantee dispatch on schedule, not a delivery date, since carriers control transit once a package leaves the warehouse. Orders over $250 ship free. Tracking updates in real time. Oath only ships within the United States, with no international option right now.
A refund policy with actual teeth
If a product doesn't meet its stated specs or purity, Oath will refund or replace it. Same goes for transit damage you photograph within 48 hours, the wrong item, an order that never arrives, or a duplicate order caught before it ships. No restocking fee. Approved refunds land in 5-7 business days, and they respond to requests in 24-48 hours. Opened or used product isn't covered — normal for research material, and worth knowing before you order, not after.
Expired Oath codes
Old codes still get shared online long after they stop working. Here's what's dead, so you don't waste a try.
| Code | Offer | Expired | Status |
|---|---|---|---|
| OATHSAVE | 10% off any order | 2026-04-02 | Expired |
| WELCOME15 | 15% off new accounts | 2026-01-15 | Expired |
| BULK50 | $50 off orders over $400 | 2025-10-30 | Expired |
| SUMMER2025 | 18% off sitewide | 2025-08-31 | Expired |
What the Two Codes Actually Do
The first code is built for new customers. It takes 20% off your first order — nothing more to do, no minimum spend required. Oath's own site already offers new accounts 15% off, so this code beats that by five points. If you've never ordered from Oath before, this is the one to use, and it only takes a few seconds to apply at checkout.
The second code is for everyone, including people who've ordered before. It takes 15% off, with no minimum and no limit on how many times you can use it. If the first code won't apply to you — because you already have an account, say — this is the one that will. It's the code most returning customers end up reaching for.
Only one code applies per order. Pick the one that matches your situation, not both — the checkout takes a single code, and entering two won't combine the discounts. If you're not sure which one fits, the how-to-use page walks through both in more detail.
What Oath Research Sells
Oath sells research peptides — material meant for laboratory and research use, not for human consumption. Nothing on this page, and nothing on Oath's own site, is dosing advice, a protocol, or a suggestion for how to use anything you order. That line matters, and we're not going to blur it just to make a page sound more useful than it should.
That's a deliberate line, not a gap. Oath states plainly that it won't advise on dosing or reconstitution, and that's the correct posture for a vendor selling research material rather than medicine. If you're looking for guidance on using a peptide, this isn't the resource for that, and neither is Oath's support line — their team won't walk you through it either.
What this page and the rest of this site do cover is straightforward: the two working codes, what Oath tests and publishes, how shipping and returns work, and how to reach Oath directly if you need to. That's the whole scope, and we try to stay inside it rather than drifting into territory neither this site nor Oath is set up to cover.
Why Trust a Promo Code Site
Coupon pages have a mixed reputation, and plenty of them earn it — dead codes, invented discounts, vague claims about savings that don't hold up at checkout. This page tries not to be that. Both codes here were checked against Oath's actual checkout before this page went live, and the discount amounts match what's applied.
Neither code pays anyone a commission, so there's no incentive to exaggerate what they do or leave a dead one up because it still draws clicks. When a code stops working, it moves to the expired list instead of quietly disappearing from view. That's a small thing, but it's the difference between a page that's maintained and one that's been abandoned with old information still live on it.
If you want to confirm a code yourself before relying on this page, you can always check it directly at Oath Research's checkout. Nothing here asks you to take our word over your own eyes.
Where to Go From Here
This page covers the two codes and the basics. A few other pages go deeper if you want them, and none of them require reading this one first.
How-to-use walks through exactly where to enter a code and what to do if one gets rejected, step by step. Why Oath covers the testing record and return policy in full, including where the record has real limits. Shipping breaks down delivery timing, the free-shipping threshold, and what's covered if something arrives wrong. Expired lists codes that no longer work, in case you found one somewhere else and want to check it first before typing it in.
Start wherever your actual question is, using the menu above. This page exists to get you a working code fast — the rest is here for whenever you want more than that. None of those pages repeat what's already here, so there's no wasted reading either way.
Ready to use a code?
Copy either code above, then paste it into the discount field at checkout. The 20% code is for first orders; the 15% code works every time.