Best value
20% off
New customers
20% off your first order. New customers only. First order.
Use at oathresearch.comSame company, new name
Oath Peptides promo codes still work today
One discount is built for a first order and beats the welcome offer Oath already advertises; the other has no minimum and works every time after that.
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
- Same address & phone
- Codes work at new site
- Free ship over $250
Two discount codes are live at Oath Research's checkout right now — one built for a first order, one with no minimum that works on any order after that. Neither pays this site a commission.
If you're searching for an Oath Peptides promo code, here's the short version: Oath Peptides is now Oath Research. It's the same company, the same warehouse, the same phone number — just a new name on the sign. The banner on their site says it plainly: "Oath Peptides Is Now Oath Research!" You'll even notice their site footer hasn't fully caught up yet; it still reads "© 2026 Oath Peptides." That mismatch is normal in the middle of a rename, not a sign anything's wrong. What matters for you is simpler: the discount codes tracked on this page work today, at the current site, oathresearch.com. This page explains the name change in plain terms, shows you where to actually shop, and keeps two active codes current so you're not stuck typing a dead one into a checkout box.
The trust case, in numbers
Oath Research's testing program is the strongest argument for ordering from them, and it's checkable rather than promotional. These are the numbers behind that argument, pulled from Oath's own published archive rather than from marketing copy.
- 425+batches testedand growing, Aug 2026
- 99.63%average puritytrailing 12 months
- 250/425certificates publicrest require login
- $250+ships freeUS orders only
One name, one business
Oath Peptides and Oath Research are the same company under two names, mid-rename. The header banner on Oath's own site announces the new name; the footer copyright line hasn't caught up yet and still reads the old one. Same address in Gilbert, Arizona. Same published phone number. If an old code or an old bookmark used the Oath Peptides name, it's pointing at the same business you'd reach today through Oath Research — just possibly at a domain, oathpeptides.com, that now appears to be offline.
Tested by batch, not by guess
More than 425 batches have gone through third-party testing as of August 2026, with an average purity of 99.63% over the trailing twelve months. Purity is measured by HPLC-UV, identity confirmed by LC-MS, and the lab behind the numbers — Freedom Diagnostics — is named directly on each certificate. That's a structure built to be checked, not just claimed: 250 of the 425 certificates are searchable without an account at oathresearch.com/lab-results, with the rest available after logging in.
A refund tied to the purity claim
If a shipment doesn't meet its stated specifications or purity, Oath's policy covers a refund or a replacement — no restocking fee, refunds processed in 5 to 7 business days once approved. The same policy covers documented shipping damage, a wrong item, non-delivery, and duplicate orders caught before they ship. Opened or used product outside those categories isn't eligible for return, which is standard for research material. Tying a refund directly to the purity number is what makes the testing claim mean something beyond a certificate nobody acts on.
Shipping that states its own limits
Orders placed before noon Mountain Standard Time on a business day ship the same day, moving by 2-day business air with real-time tracking. US orders over $250 ship free. Oath ships within the United States only. The company is specific about what it's promising — dispatch on schedule, not a guaranteed delivery date from the carrier — which is a more honest framing than a flat delivery-time promise, and it's stated that way directly rather than left to be assumed.
Expired Oath codes
Codes carrying the Oath Peptides name have circulated for well over a year, and most of what's still being shared today no longer applies at checkout. Below is a specific list of which ones are dead and roughly when each one stopped working.
| Code | Offer | Expired | Status |
|---|---|---|---|
| PEPTIDES20 | 20% off sitewide | 2026-03-05 | Expired |
| OATHPEP10 | 10% off any order | 2026-01-22 | Expired |
| VIALSAVE | $15 off orders over $150 | 2025-11-14 | Expired |
| LABVAULT12 | 12% off sitewide | 2025-08-19 | Expired |
Why the name changed on you
"Oath Peptides Is Now Oath Research!" is the exact line Oath runs across the top of its own site. That's not a rumor pieced together from old cached pages — it's the company announcing its own rename, in its own words, right now.
We don't know why they changed the name, and we're not going to guess. Companies rename for all kinds of reasons — brand strategy, legal cleanup, a founder's preference — and inventing a story would be exactly the kind of thing a reader can't verify and shouldn't trust. What we can tell you, because you can check it yourself in under a minute, is what didn't change: the street address is the same, 51 West Vaughn Avenue Suite 205 in Gilbert, Arizona. The phone number is the same, (480) 999-1097. The lab-testing program, the shipping policy, the account system — all of it carried over. A rename is a label change. It is not evidence of a different business standing behind the label.
If you'd bookmarked oathpeptides.com specifically, that address now appears to be offline. That's expected once a company consolidates onto its new domain; it isn't a separate red flag stacked on top of the rename.
How we know it's the same company
Two details keep pointing to the same conclusion. First, Oath's own site is currently running both names at once — the header banner says Oath Research, the footer copyright line still says "© 2026 Oath Peptides." A company doesn't run someone else's old copyright line in its own footer. Second, the contact information hasn't moved: the same Gilbert, Arizona address, the same published phone number, (480) 999-1097. Three independent business directories list that same address and number tied to the company, which is a harder thing to fake than a website banner, since it would mean coordinating a fabrication across sources that have no reason to agree with each other.
None of this proves anything about the company's history or its future plans — we're not in a position to promise that. It's enough to answer the question most people searching "Oath Peptides promo code" actually have: is this still a working, ordering-open business? Yes, under its current name, Oath Research.
Where the codes actually work
The codes tracked on this page are entered at checkout on oathresearch.com — that's the live site, regardless of which name brought you here. One of the two active codes is aimed at a first order and knocks a meaningful chunk off the total; it beats the 15%-off welcome offer Oath already advertises on its own homepage, worth knowing if you were about to settle for the smaller number. The second code has no such restriction — it works on a first order or a fortieth, and there's no minimum cart size to hit.
Between the two, most shoppers have a code that fits them. Full instructions, including exactly where the code box sits in checkout and what to do if a code gets rejected, are on the how-to-use page. Neither code pays this site anything. There's no commission, no referral fee, no cut of your order — we track these because keeping one page current is more useful than making you dig through outdated coupon forums.
If you still have an old Oath Peptides code
Promo codes with the Oath Peptides name on them have circulated for a while, and most of the ones still being shared are dead. If a code you found somewhere else doesn't apply at checkout, that's very likely why — not a site glitch, not a browser problem, and not something specific to your account. The expired-codes page lists which older codes have stopped working and roughly when, so you're not left guessing whether to keep retrying a code that's simply run its course.
The two codes tracked here are checked against Oath's live checkout, not pulled from a list nobody's touched in months, and this page gets revisited whenever there's reason to think that's changed. If you're unsure whether a code you're holding is one of the two still working, the how-to-use page explains exactly what a successful code looks like once it's applied, so you're not left guessing at checkout either.
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.